[User]
Hi! I'm looking for some help creating a parametric filament guide for my 3D printer, which is a Wanhao i3 clone. I've seen some designs that use a spiral to guide the filament, and I'd like to try making my own.

The basic idea is this: I want a flat mounting plate that attaches to the printer, then an arm extending out, and finally a spiral that the filament will pass through. I need the design to be customizable, so I can adjust the size and shape to fit my specific printer and filament.

Here are the parameters I think are needed:

*   **`arm_height`**: The thickness of the arm and spiral. I was thinking around 2mm should work well for PETG, but I'd like to be able to adjust this.
*   **`mount_height`**: The thickness of the mounting plate. Maybe 1mm to start?
*   **`mount_x`**: The width of the mounting plate. I'm thinking 55mm would be good initially.
*   **`mount_y`**: The depth of the mounting plate. Maybe 48mm to start?
*   **`spiral_arm_length`**: Length from the edge of the mount plate to where the spiral begins, around 45mm to start.
*  **`mount_arm_length`**: Length from back of the mount plate to the end of the arm, before the spiral arm, about 36mm.
*   **`hole_x`**: Distance of the mounting holes from the right edge, maybe 15mm.
*   **`hole1_y`**: Distance of the first mounting hole from the front edge, around 10mm.
*   **`hole2_y`**: Distance of the second mounting hole from the front edge, maybe 40mm.
*   **`hole_d`**: Diameter of the mounting holes, I think 5.2mm for M5 screws.
*   **`arm_width`**: Width of the arms - how about 10mm?
*   **`spiral_loops`**: Number of loops in the spiral.  I'd like to start with 3.
*   **`spiral_zoom`**: A zoom factor for the spiral. maybe 1.5?
*   **`spiral_x_adj`**: An adjustment to line up the spiral end with the arm. I guess -11.5 to start?
*   **`spiral_arm_thickness`**: Thickness between the two lines of the spiral. I'd start at 2.

The spiral should be created using a function or module similar to this (but you can do it however you feel is best):
```
start_angle = 90;
end_angle = 360 * spiral_loops;

function spiral(r, t) = let(r = (r + t / 90)) [r * sin(t), r * cos(t)];

inner = [for(t = [start_angle : end_angle]) spiral(spiral_zoom - spiral_arm_thickness, t) ];

outer = [for(t = [end_angle : -1 : start_angle]) spiral(spiral_zoom, t) ];
```
And then a polygon should be made from the `inner` and `outer` results.

I'd like the design to be made up of these parts:

1.  **Spiral:** The spiral itself, extruded to `arm_height`.
2.  **Spiral Arm:** A small arm connecting the spiral to the main arm.
3.  **Mount Arm:** The straight part of the arm extending from the mounting plate.
4. **Mount Plate:** The plate that attaches to the printer with mounting holes.

I think using `hull()` will be good to connect the arms.
It would be great if the code could be well commented and easy to understand.  I'd like to be able to adjust all the parameters easily in the Customizer.

Could you generate the necessary OpenSCAD file(s) for this design? I don't need any additional libraries.

[Assistant]
SpiralFilamentGuide.scad:
```
/*----------------------------------------------------------------------------
 * Spiralised filament guide.
 *
 * Created by FeNi64
 * Version 2.0, 2018-05-22
 * Inspired by http://www.thingiverse.com/thing:1418581
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License,
 * LGPL version 2.1, or (at your option) any later version of the GPL.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *		2018. License, GPL v2 or later
 *----------------------------------------------------------------------------*/

// Spiralised filament guide.

// Thickness of arm and spiral.  PETG flexes well with 2mm.
arm_height=2.0; // [1:0.1:5]

// Thickness of mount plate.  Thick enough to not break at the join during normal flex.
mount_height=1.0; // [1:0.1:5]
// Width of mount plate
mount_x=55.0; // [30:100]
// Depth of mount plate
mount_y=48.0; // [30:100]

// Mount Arm.  From the edge of the mount plate
spiral_arm_length=45.0; // [40:99]
// Spiral Arm.  From the back of the mount arm to the start of the spiral
mount_arm_length=36.0; // [30:99]

// Holes in Mount plate are this far from the right edge.
hole_x=15; // [5:40]
// Front hole is this far from the front.
hole1_y=10; // [5:40]
// Rear hole is this far from the front.
hole2_y=40; // [5:40]
// Hole size.
hole_d=5.2; // [2:0.1:8]

// Width of the arms
arm_width=10; // [10:20]

/* [Hidden] */
spiral_arm_thickness=2.0;
spiral_loops=3;
spiral_zoom=1.5;
spiral_x_adj=-11.5; // Match the spiral end with the arm

module spiral(){
	// From http://forum.openscad.org/2dgraph-equation-based-2-D-shapes-in-openSCAD-td15722.html

	start_angle = 90;
	end_angle = 360 * spiral_loops;

	function spiral(r, t) = let(r = (r + t / 90)) [r * sin(t), r * cos(t)];

	inner = [for(t = [start_angle : end_angle]) spiral(spiral_zoom - spiral_arm_thickness, t) ];

	outer = [for(t = [end_angle : -1 : start_angle]) spiral(spiral_zoom, t) ];

	polygon(concat(inner, outer));

}

// Spiral.
translate([spiral_x_adj,0,arm_height]) rotate([180,0,90]) linear_extrude(arm_height) spiral();

// Spiral Arm
hull() {
	translate([0,0,0]) cube([2,2,arm_height]);
	translate([-arm_width/2,spiral_arm_length,0]) cube([arm_width,arm_width,arm_height]);
}

// Mount Arm
hull() {
	translate([-arm_width/2,spiral_arm_length,0])cube([arm_width,arm_width,arm_height]);
	translate([mount_arm_length-arm_width,spiral_arm_length,0])cube([arm_width,arm_width,mount_height]);
}

// Mount plate
translate([mount_arm_length,spiral_arm_length,0]) {
	difference() {
		cube([mount_x,mount_y,mount_height]);

		// Mount holes
		translate([mount_x-hole_x,hole1_y,-1]) cylinder(h=arm_height+2,d=hole_d,$fn=30);
		translate([mount_x-hole_x,hole2_y,-1]) cylinder(h=arm_height+2,d=hole_d,$fn=30);
	}
}

```


[User]
I need a parametric OpenSCAD design for a replacement crank wheel for my Craftsman table saw. The existing wheel is broken, and I want to be able to customize the new one.

Here are the requirements:

*   **Overall Shape:** The wheel should be cylindrical with a ridged outer edge for grip. It needs a central hole for mounting and a hex-shaped recess on the top for a captive nut.
*   **Parameters:** I need to be able to adjust the following dimensions:
    *   `od`: Outer diameter of the wheel (in inches)
    *   `height`: Thickness of the wheel (in inches)
    *   `hnd`: Diameter of the hex nut (measured across the flats, in inches).
*   **Features:**
    *   The outer edge of the cylinder should have a ridged or knurled surface. You could do that using a series of small cubes or similar protrusions.
    *   The central hole should be a simple cylindrical bore through the center of the wheel.
    *   The hex nut recess needs to be the correct size to capture a nut of the given `hnd` diameter, and it should sit on the top of the cylinder. The recess needs to have a depth that allows the nut to sit flush or slightly below the top of the wheel.
    *   There should be a countersunk hole for a small handle to be attached to the wheel, located off-center (around the 3 o'clock position). This hole should go all the way through.
    *   There needs to be another threaded hole for a bolt in the center.
*   **Units:** The design should use inches as the unit of measure.

Could you also make sure that the design uses the `MCAD/units.scad` library for unit conversion?

[Assistant]
CrankWheel.scad:
```

// Crank Diameter (in)
od  = 4;

// Crank Thickness (in)
height = .6;

// Hex Nut Diameter (in)
// Measured from flat part of nut.
hnd = .795;

or = od/2;

include <MCAD/units.scad>;

scale([inch, inch, inch]) {

    difference(){
    union(){
        difference() {
            cylinder(height,or,or, $fn=90);
            translate([0,0,-.1]){
                cylinder(1,r=or*.8, $fn=90);
            }
        }
        for(i=[0:5]) {
            rotate(i*72){
               translate([0,-.25,0])
                  cube([or*.9, .5, height*.5]);
            }
        }

        // inner cylinder
        cylinder(height*.5,r=or*.58, $fn=90);
        //
        cylinder(height,r=.9, $fn=90);
        translate([0,0,height]) {
            cylinder(.4,.9,1.6/2, $fn=90);
       }
        translate([or-.25,0,0]) cylinder(height,r=.5, $fn=90);
    }
    union(){
        // handle countersink
        translate([or-.25,0,height-.1]) cylinder(.9,.35,.35, $fn=90);
        // handle hole
        translate([or-.25,0,-.1]) cylinder(50,.13,.13, $fn=90);
        // screw hole
        translate([0,0,-.1]) {cylinder(50,.2/2,.2/2, $fn=90);}
        // key bolt
        translate([0,0,height+.4-.56]) {
            cylinder(.57, r=hnd/2, $fn=6);
        }
    }
}
}
```


[User]
Okay, so I'm looking to create a customizable plant label design in OpenSCAD. I've got this idea to make it multi-part, so I can print different sections in different colors.

Here's the breakdown:

**Overall Design:** The label will be a small, rectangular placard with rounded corners. It has a slightly raised, inset area in the center to hold the text, and then there's a text part that sits on that.

**Parts:**

1.  **Outer Frame/Backing:** This will be the main part of the label - a flat rectangular shape with rounded corners. It should have a rectangular cutout in the center to accommodate the raised label area. Basically the shape of the main label, but with a central cut out for the label area.
2.  **Raised Label:** This is a solid, raised rectangular shape, again with rounded corners, that will fit snugly into the cutout of the outer frame.
3.  **Text:** This will be the actual text for the label. It should be a single layer extrusion, sitting on top of the raised label. It will be printed in a separate step (and ideally in a different color).

**Customizations:**

*   **Text:** I need to be able to change the text that's displayed on the label.
*   **Font:** I need to be able to specify the font that is used for the text.
*   **Font Size:** The size of the text should be configurable.
*   **Overall Dimensions:** I'd like to be able to change the overall size of the label (length, width, and depth for the label back and raise, while depth will be the extrusion height for the text itself).
*   **Corner Radius:** It would be useful to be able to specify the radius of the rounded corners of the frame and label.
*   **Label Depth:** The depth of the raised label (how much it sticks out from the outer frame).

**Output:** I'd like to get 3 separate .scad files which generate 3 separate .stl files. These files will be:

1.  `plant_label_outer.scad` : Generates the outer frame and back.
2. `plant_label_label.scad`: Generates the raised label area.
3.  `plant_label_text.scad`: Generates the text for the label, based on the provided inputs.

Each of these should use the customizable parameters and work together, when used with a slicer that allows multiple stl imports to combine in one print.

Can you generate these OpenSCAD files for me? I don't think I'll need any external libraries for this. I will be providing the `text`, `font`, `size`, dimensions of the overall sign, the corner radius, and the label depth.

[Assistant]
plant_sign.scad:
```
// Text to put on the plant sign
text="Example Text";

// Font size (mm): The generated text will have approximately an ascent of the given value (height above the baseline).  Note that specific fonts will vary somewhat and may not fill the size specified exactly, usually slightly smaller.
size=4;

// Font to use (any font.google.com should work and other common ones too)
font="Oswald";

module rounded_square(size, r=1) {
    x=size[0];
    y=size[1];
    union() {
        translate([r,r]) circle(r=r, $fn=50);
        translate([r,y-r]) circle(r=r, $fn=50);
        translate([x-r,r]) circle(r=r, $fn=50);
        translate([x-r,y-r]) circle(r=r, $fn=50);
        translate([0,r]) square([x,y-(r*2)]);
        translate([r,0]) square([x-(r*2),y]);
    }
}

module rounded_cube(size, r=1) {
    linear_extrude(height=size[2]) rounded_square(size=size, r=r);
}

// If thingiverse let you import stls then I could enable this to let anyone generate their own single colour signs.  Alas, not yet...

// Either generate the full "sign" or just the "text" (to use as part of a multi-colour print)
mode="text";    // [sign, text]

module label() {
    label=[22,39,0.7];
    translate([-label[0]/2, -label[1]/2, 0.5]) rounded_cube(label, r=2.5);
}

module outer() {
    difference() {
        import("stl/plant_label.stl");
        label();
    }
}

module _text() {
    translate([0,0,0.75]) rotate([0, 0, 90]) linear_extrude(height=1) text(font=font, text=text, size=size, halign="center", valign="center");
}

if (mode == "sign") {
    outer();
    label();
    _text();
}

if (mode == "text") {
    _text();
}

```


[User]
Okay, so I'm looking to create a customizable twisting gear system, kind of like a Rubik's cube but with gears. I've seen some cool designs using OpenSCAD, and I'd like to make my own. I need it to be parametric so I can easily adjust the sizes and number of teeth.

Here's what I'm picturing:

*   **Core Design:** I want a central cube-like structure where the gears attach. This center piece should have cutouts or attachment points for the gears to connect to.
*   **Gears:** I want to use bevel gears, and I'll need two sizes: a larger gear and a smaller gear. The number of teeth should be configurable, and there should be a way to adjust the spacing between the teeth for backlash. I'd like to be able to specify the relationship between gear sizes, like a 2:1 or 3:2 ratio. Also, it should be able to do a 1:1 ratio, in case I want all the gears to be the same.
*   **Layout:** The gears will be placed on all six faces of the central cube. Each corner of the cube should have two gears, one larger and one smaller. The gears should be arranged so that they mesh and rotate together.
*   **Customization:** It needs to be highly customizable. I need to be able to specify:
    *   The number of teeth on each gear
    *   The backlash (spacing between teeth)
    *   The overall size of the mechanism
    *   The ratio between the gear sizes
    *   The ability to choose a predefined ratio between the gears from a list or to input the ratio manually
    *   The ability to incorporate a custom .stl file as the base shape, in place of the central cube. I should be able to scale, translate, and rotate the imported .stl.
    *   The output should be able to be exported as a .stl file, and I also want to see an assembly. I should be able to have the assembly animated to show how the gears move together, and an exploded view where the parts are all separated out. I'd like to see them separated on the x axis, but that can be a parameter.
    *   I need a way to render each part separately as well.
    *   I'd like to be able to select a part to render from a drop down menu, and also select the type of gear ratio to use from a drop down menu.
*   **Pin Attachment:** I'd like to use snap-fit pins to attach the gears to the central cube. The design should include these pins and their corresponding holes in the gears. This pin design is pretty important, and I might want to adjust the parameters of them, so please make sure those are exposed.
*   **Libraries:** I'd like to use the `MCAD/involute_gears.scad` library for the bevel gear generation, since that already handles gear parameters nicely, so please make sure to include that. I'd also like to have the parametric pin design available.

I think that's about it. I know it's a lot, but I'd really appreciate it if you could put together the OpenSCAD code for me. Let me know if you have any questions.

[Assistant]
Custom_Twisting_Gears.scad:
```
// Customizable Cube Gears
// Note: the assembly is animated

use <MCAD/involute_gears.scad>
//use <../pin2.scad>

choose(i=object);

//Choose which part to render (assembly is only for viewing)
object=13;//[0:Center,1:Large Gear 1,2:Large Gear 2,3:Large Gear 3,4:Large Gear 4,5:Small Gear 1,6:Small Gear 2,7:Small Gear 3,8:Small Gear 4,9:Pin,10:Plate,11:Assembly,12:Exploded,13:test]
//Numbers of teeth on gears
type=0;//[0:18 & 9,1:9 & 6,2:18 & 15]
//Space between gear teeth
Backlash=0.5;
// .stl file name/path
filename="";
x=0; // [-300:300]
y=0; // [-300:300]
z=0; // [-300:300]
enlarge=1.0; //[1:0.1:20]
shrink=1.0; //[1:0.1:20]
separate = 50; // [30:90]
/* [Hidden] */
TOP=0;
BOTTOM=1;
RIGHT=0;
LEFT=1;
FRONT=0;
BACK=1;
first_rotate =
[
  [
    [
      [0,0,45], // top right front
      [0,0,-45] // top right back
    ],
    [
      [0,0,135], // top left front
      [0,0,-135] // top left back
    ]
  ],
  [
    [
      [180,0,-45], // bottom right front
      [0,-180,-135] // bottom right back
    ],
    [
      [0,180,45], // bottom left front
      [0,180,-45] // bottom left back
    ]
  ]
];
//use <utils/build_plate.scad>
////for display only, doesn't contribute to final object
//build_plate_selector = 0; //[0:Replicator 2,1:Replicator,2:Thingomatic,3:Manual]
////when Build Plate Selector is set to "manual" this controls the build plate x dimension
//build_plate_manual_x = 100; //[100:400]
////when Build Plate Selector is set to "manual" this controls the build plate y dimension
//build_plate_manual_y = 100; //[100:400]

rf1=50*1;// distance from center of cube to end of gear 1 (before clipping)
$fs=0.5*1;// adjust number of faces in holes

NR=[[18,9,0.7493,0.3746,1],
	[9,6,0.6860,0.4573,2],
	[18,15,0.6285,0.5238,5]];

Nr=NR[type];
n1=Nr[0];// number of teeth on gear 1
n2=Nr[1];// number of teeth on gear 2
r1=Nr[2];// these two numbers come from gearopt.m
r2=Nr[3];
nt=Nr[4];// number of turns per cycle
cp=0.28*1;// percentage of rf1 for the center block
dc=rf1/sqrt(1-pow(r1,2));
theta=asin(1/sqrt(3));
pitch=360*r1*dc/n1;
rf2=sqrt(pow(dc,2)-pow(r2*dc,2));

module choose(i=0){
	if(i==0)translate([0,0,rf1*cp])center();
	if(i==1)gear1(first_rotate[TOP][LEFT][BACK]);
	if(i==2)gear1(first_rotate[TOP][RIGHT][FRONT]);
	if(i==3)gear1(first_rotate[BOTTOM][RIGHT][BACK]);
	if(i==4)gear1(first_rotate[BOTTOM][LEFT][FRONT]);
	if(i==5)gear2(first_rotate[TOP][RIGHT][BACK]);
	if(i==6)gear2(first_rotate[TOP][LEFT][FRONT]);
	if(i==7)gear2(first_rotate[BOTTOM][LEFT][BACK]);
	if(i==8)gear2(first_rotate[BOTTOM][RIGHT][FRONT]);
	if(i==9)pinpeg();
	if(i==10)plate();
	if(i==11)assembly(1);
	if(i==12)assembly(3);
	//if(i<5)build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);
   if(i==13)test();
}

module test() {
    main_shape(rf1);
}

module plate() {
for (tb_loop=[TOP:BOTTOM])
	for (lr_loop=[LEFT:RIGHT])
		for (fb_loop=[FRONT:BACK])
		{
			k = 4*tb_loop+2*lr_loop+fb_loop;
			j = floor(k/2);
			translate([10*(k-1),-separate,0])pinpeg();
			is_large = ((tb_loop+lr_loop+fb_loop)%2 == 0);
			if (is_large) {
				translate([separate*(j-1.5),is_large ? 0 : separate,0])rotate([0,0,10])gear1(first_rotate[tb_loop][lr_loop][fb_loop]);
			} else {
				translate([separate*(j-1.5),is_large ? 0 : separate,0])rotate([0,0,10])gear2(first_rotate[tb_loop][lr_loop][fb_loop]);
			}
		}
	translate([-separate,-separate,rf1*cp])center();
}

module assembly(factor)
rotate([0,0,45]){
	rotate([theta+90,0,0])center();

	twogears1([0,0,0],first_rotate[TOP][LEFT][BACK],factor);
	twogears2([0,0,0],first_rotate[TOP][RIGHT][BACK],factor);

	twogears1([0,0,180],first_rotate[TOP][RIGHT][FRONT],factor);
	twogears2([0,0,180],first_rotate[TOP][LEFT][FRONT],factor);

	twogears1([180,0,90],first_rotate[BOTTOM][RIGHT][BACK],factor);
	twogears2([180,0,90],first_rotate[BOTTOM][LEFT][BACK],factor);

	twogears1([180,0,-90],first_rotate[BOTTOM][LEFT][FRONT],factor);
	twogears2([180,0,-90],first_rotate[BOTTOM][RIGHT][FRONT],factor);
}

module twogears1(last_rotation,first_rotation,factor){
	rotate(last_rotation)rotate(a=[0,90-theta,90])rotate([0,0,nt*120*$t])translate([0,0,factor*rf1*cp])gear1(first_rotation);
}

module twogears2(last_rotation,first_rotation,factor){
	rotate(last_rotation)rotate(a=[0,90-theta,0])rotate([0,0,-nt*n1/n2*120*$t])translate([0,0,factor*rf2*cp])gear2(first_rotation);
}

module center(){
intersection(){
	box();
	rotate([2*(90-theta),0,0])box();
	rotate([2*(90-theta),0,120])box();
	rotate([2*(90-theta),0,-120])box();
	rotate(-[theta+90,0,0])rotate([0,0,45])cube(0.85*rf1,center=true);
}}

module box(){
render(convexity=2)
translate([0,0,(rf2-rf1)*cp/2])difference(){
	cube(size=[dc,dc,(rf1+rf2)*cp],center=true);
	translate([0,0,-(rf1+rf2)*cp/2])pinhole(fixed=true,fins=false);
	rotate([180,0,0])translate([0,0,-(rf1+rf2)*cp/2])pinhole(fixed=true,fins=false);
}}

module main_shape() {
    scale_amount = enlarge / shrink;
    if (filename == "") {
	    cube(size=rf1, center=true);
       //sphere(r=rf1/2.0, $fn=90, center=true);
    } else {
        scale(scale_amount)
        translate([x,y,z])
        import(filename, center=true);
    }
}

module gear1(first_rotation){
render()
intersection(){
	translate([0,0,-rf1*cp])rotate([0,theta-90,0])rotate(first_rotation)main_shape();
	difference(){
		translate([0,0,rf1*(1-cp)])rotate([180,0,90/n1])
		bevel_gear (number_of_teeth=n1,
			outside_circular_pitch=pitch,
			cone_distance=dc,
			face_width=dc*(1-cp),
			bore_diameter=0,
			backlash=Backlash,
			finish=0);
		pinhole(fixed=false);
	}
}}

module gear2(first_rotation){
render()
intersection(){
	translate([0,0,-rf2*cp])rotate([0,theta-90,0])rotate(first_rotation)main_shape();
	difference(){
		translate([0,0,rf2*(1-cp)])rotate([180,0,90/n2])
		bevel_gear (number_of_teeth=n2,
			outside_circular_pitch=pitch,
			cone_distance=dc,
			face_width=dc*(1-cp),
			bore_diameter=0,
			backlash=Backlash,
			finish=0);
		pinhole(fixed=false);
	}

}}

module monogram(h=1)
linear_extrude(height=h,center=true)
translate(-[2,5])union(){
	difference(){
		square([4,5]);
		translate([1,1])square([2,3]);
	}
	square([6,1]);
	translate([0,2])square([2,1]);
}

// Parametric Snap Pins (http://www.thingiverse.com/thing:213310)

module pin(r=3.5,l=13,d=2.4,slot=10,nub=0.4,t=1.8,space=0.3,flat=1)
translate(flat*[0,0,r/sqrt(2)-space])rotate((1-flat)*[90,0,0])
difference(){
	rotate([-90,0,0])intersection(){
		union(){
			translate([0,0,-0.01])cylinder(r=r-space,h=l-r-0.98);
			translate([0,0,l-r-1])cylinder(r1=r-space,r2=0,h=r-space/2+1);
			translate([nub+space,0,d])nub(r-space,nub+space);
			translate([-nub-space,0,d])nub(r-space,nub+space);
		}
		cube([3*r,r*sqrt(2)-2*space,2*l+3*r],center=true);
	}
	translate([0,d,0])cube([2*(r-t-space),slot,2*r],center=true);
	translate([0,d-slot/2,0])cylinder(r=r-t-space,h=2*r,center=true,$fn=12);
	translate([0,d+slot/2,0])cylinder(r=r-t-space,h=2*r,center=true,$fn=12);
}

module nub(r,nub)
union(){
	translate([0,0,-nub-0.5])cylinder(r1=r-nub,r2=r,h=nub);
	cylinder(r=r,h=1.02,center=true);
	translate([0,0,0.5])cylinder(r1=r,r2=r-nub,h=5);
}

module pinhole(r=3.5,l=13,d=2.5,nub=0.4,fixed=false,fins=true)
intersection(){
	union(){
		translate([0,0,-0.1])cylinder(r=r,h=l-r+0.1);
		translate([0,0,l-r-0.01])cylinder(r1=r,r2=0,h=r);
		translate([0,0,d])nub(r+nub,nub);
		if(fins)translate([0,0,l-r]){
			cube([2*r,0.01,2*r],center=true);
			cube([0.01,2*r,2*r],center=true);
		}
	}
	if(fixed)cube([3*r,r*sqrt(2),2*l+3*r],center=true);
}

module pinpeg(r=3.5,l=13,d=2.4,nub=0.4,t=1.8,space=0.3)
union(){
	pin(r=r,l=l,d=d,nub=nub,t=t,space=space,flat=1);
	mirror([0,1,0])pin(r=r,l=l,d=d,nub=nub,t=t,space=space,flat=1);
}

```


[User]
Hey, I'm looking to design a parametric mount for a standard-sized servo motor, like an MG995, but I need it to be easily adjustable for different servo dimensions and screw sizes. I've seen a design that seems pretty close to what I want, but I need it made from scratch so it's fully customizable using parameters.

Essentially, the mount should consist of a base plate that sits flush against the servo, with side arms that wrap around the servo, allowing for it to be screwed in. The base plate's thickness and the side arms' height need to be adjustable.

Specifically, I'd need the following parameters:

*   `servoDepth`: The depth of the servo.
*   `servoHeight`: The height of the servo.
*   `mountThickness`: The thickness of the base plate and side arms.
*   `screwHeadDiameter`: The diameter of the screw head.
*   `screwThreadDiameter`: The diameter of the screw thread.
*   `screwHeadHeight`: The height of the screw head.
*    `screwHeadIsSlanted`: A boolean to control whether the screw head has a conical or flat seat.

The design should use differences with cylinders to create the screw holes. The holes should countersink correctly using `screwHeadDiameter`, `screwThreadDiameter`, and `screwHeadHeight` and `screwHeadIsSlanted` as parameters. The screw holes should go through the thickness of the side arms.

It would also be great if the final design used OpenSCAD and didn't rely on any external STL files. Let me know what you think, I'm excited to see what you come up with!

[Assistant]
mg995-mount.scad:
```
servoDepth = 20;
servoHeight = 40.5;
mountThickness = 3;
screwHeadDiameter = 6;
screwThreadDiameter = 2;
screwHeadHeight = 2.5;
screwHeadIsSlanted = true;

// translate([24,16.5,-1])
	// rotate([270,0,0])
		mount();
		//translate([0,0,(servoDepth/2)+mountThickness]) cube([servoDepth,servoHeight,servoDepth], center=true);
// color("grey") rotate([0,90]) scale(.92) import(file="MG995_dummy.stl");

module mount()
{
	// translate([-(servoDepth/2),-(servoHeight/2)+mountThickness/2,0])
	union()
	{
		translate([servoDepth/2,0,(mountThickness/2)]) cube([servoDepth,servoHeight,mountThickness], center=true);
		translate([0,-(servoHeight/2)-mountThickness,0]) side();
		translate([0,(servoHeight/2)+mountThickness,0]) mirror([0,1,0]) side();
	}

}

module rightTriangle()
{
	translate([0,0,20])
	rotate([0,90,0])
	difference()
	{
		cube([20,20,20]);
		rotate([0,0,45]) translate([0,0,-1]) cube([30,20,25]);
	}
}

module side()
{

	difference()
	{
		union()
		{
			translate([0,-10,servoDepth]) cube([servoDepth,10+mountThickness,mountThickness]);
			cube([servoDepth,mountThickness,servoDepth]);
			translate([0,0,servoDepth]) mirror([0,1,1]) resize([servoDepth, 10, 10]) rightTriangle();

		}

		union()
		{
			translate([servoDepth/2,-5,0]) cylinder(h=servoDepth+10, d=screwThreadDiameter, $fn=20);
			translate([servoDepth/2,-5,0]) cylinder(h=servoDepth-screwHeadHeight, d=screwHeadDiameter, $fn=20);
			translate([servoDepth/2,-5,servoDepth-screwHeadHeight]) cylinder(h=screwHeadHeight, d1=screwHeadDiameter, d2=screwHeadIsSlanted ? screwThreadDiameter : screwHeadDiameter , $fn=20);
		}
	}
}

```


[User]
I'm looking for an OpenSCAD design that can create either a stylized tree or a pot for that tree, controlled by a single variable that I can set to "Tree" or "Pot".

For the "Tree" option, I want a recursive tree structure. It should start with a main trunk, and then branch out repeatedly. The key parameters should be:

*   `levels`: The number of branching levels (how many times the trunk splits into two).
*   `len`: The length of the initial trunk segment.
*   `thickness`: The thickness of the initial trunk segment.
*   `height`: The overall height of the tree, which should only affect the vertical extrusion of the 2D tree shape, if possible.
*   `random_number`: A seed for controlling the randomness of branching angles and segment lengths.

Each branch should get slightly shorter and thinner as it goes up the levels, maybe about 80% of the length and thickness of the previous. Also, the branching angles shouldn't be fixed, I'd like them to be random within a small range, say between 20 and 35 degrees for the left and right branches. I want each branch to be rotated on the Z axis, as shown in the provided code. The color of the tree segments should also be a gradient, going from dark green at the base to a brighter, lighter green at the highest point.

For the "Pot" option, it should be a cylindrical pot with a lip/torus at the top. The parameters for this should be:

*   `shaft_deepness`: The depth of a rectangular hole at the center of the pot, for placing the tree.
*   `y_side_length_of_your_tree` and `x_side_length_of_your_tree`: The dimensions of the rectangular hole in the center of the pot.
*   `Base_radius`: The base radius of the pot.
*    `top_torus_radius`: The radius of the torus/lip at the top.
*   `height_pot`: The total height of the pot.

I’d also like to ensure that the central hole is properly aligned with the center of the pot and extends all the way through. The pot should be a smooth cylinder, extruded from a circle, and the torus should be created with a rotate_extrude.

The design should use a conditional block with an `if` statement to choose between generating the tree or the pot, controlled by a string variable.

I don't need any libraries for this.

[Assistant]
Pot.scad:
```
//!OpenSCAD

// you need both!
Item = "Pot";//[Pot,Tree]

/*[Tree]*/

//number of brenches
levels = 5;
// length of the first segment in mm
len = 50;
// thickness of the first segment
thickness = 5;
//heigh of thewhle tree
height = 5;
//a random number wich determines the position of the trees
random_number = 6;//[-100000,100000]

/*[Pot Settings]*/
// length of the shaft for the tree in mm
shaft_deepness = 10;
// legth of the sides of the base of the tree in mm
y_side_length_of_your_tree = 3.5;
x_side_length_of_your_tree = 3.5;
// base radius of the pot in mm
Base_radius = 12.5;
//Top radius in mm
top_torus_radius = 3;
//height of the pot in mm
height_pot = 20;
/*[Hidden]*/
identity = [ [ 1, 0, 0, 0 ], [ 0, 1, 0, 0 ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ];

rcnt = 1000;
random = rands(0, 1, rcnt, random_number);

function rnd(s, e, r) = random[r % rcnt] * (e - s) + s;

// generate 4x4 translation matrix
function mt(x, y) = [ [ 1, 0, 0, x ], [ 0, 1, 0, y ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ];

// generate 4x4 rotation matrix around Z axis
function mr(a) = [ [ cos(a), -sin(a), 0, 0 ], [ sin(a), cos(a), 0, 0 ], [ 0, 0, 1, 0 ], [ 0, 0, 0, 1 ] ];

module tree(length, thickness, count, m = identity, r = 1) {
    color([0, 1 - (0.8 / levels * count), 0])
        multmatrix(m)
            square([thickness, length]);

    if (count > 0) {
        tree(rnd(0.6, 0.8, r) * length, 0.8 * thickness, count - 1, m * mt(0, length) * mr(rnd(20, 35, r + 1)), 8 * r);
        tree(rnd(0.6, 0.8, r + 1) * length, 0.8 * thickness, count - 1, m * mt(0, length) * mr(-rnd(20, 35, r + 3)), 8 * r + 4);
    }
}
if (Item == "Pot"){
difference() {
  union(){
    {
      $fn=50;    //set sides to 50
      linear_extrude( height=height_pot, twist=0, scale=[1.2, 1.2], center=false){
        circle(r=Base_radius);
      }
    }
    translate([0, 0, height_pot]){
      scale([1.2, 1.2, 1]){
        // torus
        rotate_extrude($fn=50) {
          translate([(Base_radius - top_torus_radius), 0, 0]) {
            circle(r=top_torus_radius, $fn=50);
          }
        }
      }
    }
  }

  translate([0, 0, (height - shaft_deepness) + 50]){
    cube([x_side_length_of_your_tree, y_side_length_of_your_tree, 100], center=true);
  }
}
}
else{

linear_extrude(height = height){
    tree(len, thickness, levels);
}}
```


[User]
I'd like to request an OpenSCAD design for a parametric soap dish. I have some ideas about the shape and features, and I'd like it to be fully customizable.

Here's what I'm envisioning:

**Overall Shape:** The soap dish should have a generally rectangular footprint but with some unique shaping, specifically incorporating a sloping base for drainage.

**Dimensions (Parametric):**
*   **Width (W):**  This will define the overall width of the dish.
*   **Depth (D):** This will define the front-to-back depth of the dish.
*   **Height (H):** This will define the overall height of the dish.
*   **Thickness (T):** The thickness of the material used for the dish.
*   **Corner Rounding Radius (R):** Radius for rounding the corners.

**Features:**

1.  **Sloping Base:** The bottom of the dish should be a plane that slopes down from the right side toward the lower-left corner to allow water to drain effectively.

2.  **Ribs:** There should be a series of ribs running along the width of the base to minimize contact with the soap and further promote drainage. These ribs should have rounded ends.

3. **Frontal Element:** Along the front (depth) side of the dish, there should be a cut-out that contains some text, like the word "SOAP".

4.  **Drainage Window:** In the lower-left corner of the dish, there should be an opening to allow water to drip through.

5.  **Top Notch:** On the top edge of the dish, I want a notch that's curved downwards, kind of like a semi-circle that's been slightly cut into the top, that will help keep the soap centered on the dish. This should be positioned roughly centered along the depth.

**Customization:**

*   All of the dimensions mentioned above (W, D, H, T, R) should be parametric, so I can easily adjust them.
*   The text for the frontal cut-out should also be customizable, allowing me to specify the words and the font used.

**Additional Requirements:**

*   I would like the design to be minimalistic and efficient to print.
*   I'd like the design to use the `$fn` variable for all circles and curves to maintain a smooth appearance. Please use `$fn = 100` as a starting point.
*   Please use only OpenSCAD code for the design, and don't rely on any libraries.

I think that's all of the details. Please let me know if there's anything unclear or if you need more information before getting started. Thank you!

[Assistant]
Jabonera_v2.scad:
```
// Width
    W=120;
// Depth
    D=80;
// Height
    H=20;
// Thickness
    T=1.5;
// Corner rounding radius
    R=1.5;
// $fn
    $fn=100;

// Jabonera
difference() {
    union () {
        ribs();
        plano_inclinado();
        frontal();
    }
    desague();
    muesca_superior();
}

// Modules
module ribs () {
    for(y=[0:(W-T)/12:W]) {
        translate([0,y,0])
        minkowski(){
            if ((y > 0) && (y < W-T-1))
                cube([D-2*R-5, T/2, H-2*R]);
            else
                cube([D-2*R, T/2, H-2*R]);
            translate([R,0,R]) rotate([-90,0,0])cylinder(r=R, h=T/2, center=false);
        }
    }
}

module plano_inclinado () {
    Plano = [
    [R,0,H-R],       // 0 top left back
    [D,0,T],         // 1 top left front
    [D,W,H/4],       // 2 top right front
    [R,W,H-R],       // 3 top right  back
    [R,0,H-R-T],     // 4 bottom left back
    [D,0,0],         // 5 bottom left  front
    [D,W,H/4-T],     // 6 bottom right front
    [R,W,H-T-R],     // 7 bottom right  back
    ];
    Caras = [
    [0,1,2,3],  // top
    [4,5,1,0],  // left
    [7,6,5,4],  // bottom
    [5,6,2,1],  // front
    [6,7,3,2],  // right
    [7,4,0,3]]; // back
    polyhedron(Plano, Caras, convexity=10);
}

module frontal () {
    difference(){
    translate([D-T,T,0]) cube([T,W-2*T,H-R]);
    translate([D-0.5,W/2,H/2-R])rotate([90,0,90])linear_extrude(height=0.5)text("SOAP", font="Herculanum", halign="center", valign = "center");}
    }

module desague () {translate([D-2*T,T,1.6*T]) rotate([0,15,0]) cube(5,5,5);}

module muesca_superior () {translate([D/2,T,0.84*H+1.19*D])
rotate([-90,0,0]) cylinder(h=W-2*T, r=1.19*D);}

```


[User]
Alright, I'm looking to design a parametric tape dispenser in OpenSCAD. I've got a few specific requirements and some ideas on how it should be structured.

Essentially, the dispenser needs to have a main body that cradles the tape roll, with a curved section for the tape to pass over. The basic parameters I'm looking at are:

*   `tape_width`: This defines the width of the tape roll itself.
*   `height`: The overall height of the dispenser body.
*   `length`: The length of the dispenser body.
*   `diametre_curvature`: The diameter of the curved section that guides the tape.
*   `gap`: A gap to allow for the tape to be pulled out, I think.
*   `detent_radius`: Radius of spheres that act as detents to hold the roll of tape in place
*   `add_teeth`: A boolean to add or remove the teeth for cutting tape.

Here are some more specific details:

*   The main body should be created by a difference of a cube that defines the outer body, a cube that creates the inner cutout for the roll, a cube that creates the tape gap, and two cylinders for finger cutouts.
*   The curved section for the tape should be a portion of a cylinder.
*   There should be spherical detents on each side of the roll cutout. These should be controlled by `detent_radius`.
*   If `add_teeth` is true, then a set of cutting teeth should be created along the edge where the tape would be pulled and cut. They should be cylinders and be positioned accordingly. There also should not be a finger cutout on the teeth side of the dispenser.
*   The teeth, if enabled, should be created with a separate module with some additional parameters like `tooth_size` and `tooth_distance_factor`.

I'd like all the parameters to be easily configurable, so everything should be adjustable in the customizer.

I'd like the files to be structured with a main file that calls all the modules. I don't need any external libraries for this project. I think it can all be done with basic primitives and transforms.

I'm not sure what the best naming scheme is so whatever you come up with is good, but please make sure everything is clear.

[Assistant]
tape_dispenser.scad:
```
// Tape dispenser
// Made by Lucian Brandus
// teeth by Marcel Mommsen (and some stuff translated to english - incomplete)
// Detents by Jonas Schiller

tape_width = 51; // width rola
height = 20; // dispenser height
length = 30; // dispenser length
diametre_curvature = 50; // grip diameter
gap = 10; // gap
detent_radius=4;
add_teeth = "no"; // [yes,no]
enable_teeth = add_teeth == "yes";

/* [Hidden] */
width = tape_width + 1.9*2;

$fn=100;

tooth_size=1;
tooth_distance_factor=1.5;

corp();
if (enable_teeth) {
    teeth();
}
detent();
mirror([0,1,0]) detent();

// Module

module corp() {
    union()
    {
        intersection()
        {
            // cilindru curbura aripi
            rotate([90, 0, 0])
            translate([0, -diametre_curvature/2, 0])
            cylinder(h = tape_width*2, d = diametre_curvature, center = true, $fn=100);
            // corp
            difference(){
                // corp dispenser
                translate([0, 0, -height/2])
                cube(size = [length,width,height], center = true);
                // cutout roll
                translate([0, 0, 2-height/2])
                cube(size = [length+1,tape_width,height], center = true);
                // gap tape
                cube(size = [gap,tape_width,height*3], center = true);
                // cutout finger
                translate([-length/2-10, 0, 0])
                cylinder(h = tape_width*2, d = 26, center = true);
                // second cutout finger (remove this one for teeth)
//                if (!enable_teeth) {
//                    translate([length/2+10, 0, 0])
//                    cylinder(h = tape_width*2, d = 26, center = true);
//                }
            }
        }
    }
}

module teeth() {
    union()
    {
        for(a = [-tape_width/2:tooth_size*tooth_distance_factor:tape_width/2]) {
            translate([length/2-tooth_size, a, -height-tooth_size])
            cylinder(h=tooth_size,r1=0,r2=tooth_size,$fn=4);
        }

    }
}

module detent() {
    difference(){
        translate([0,width/2,-detent_radius])
        sphere(r=detent_radius);
        translate([0,width/2+detent_radius,-detent_radius])
        cube(2.2*detent_radius, center=true);
    }
}

```


[User]
I'd like to create some 2D shapes in OpenSCAD, specifically circles, rounded rectangles, and both regular and compound Bézier curves. I've seen a library called `2d_points` that seems to generate these shapes as arrays of points that you can then feed into `polygon()`. I would like you to create a parametric OpenSCAD file, or several if it makes more sense, that implements these functions so that I can use them.

The circle function should allow me to specify the radius, start and end angles for arcs, and the number of segments for the curve. The rounded rectangle function should let me define the dimensions of the rectangle, a general corner radius, and individual corner radii.  I also need functions to draw Bezier curves of varying degrees, which should allow the user to specify an array of points and a resolution of sampling the curve, and also a function for drawing *compound* Bezier curves (polybeziers), which consist of multiple Bezier segments of any degree chained together, and that also lets me specify resolution.

Please organize the code into separate modules for clarity. For example, a `demo_circle` module to show off circle functionality, and so on, as shown in the example code I provided. Make use of `linear_extrude` so that these 2D shapes aren't only 2D. I'd also like to be able to use these functions within other modules or functions, as if they were a library I included.

[Assistant]
2d_points.scad:
```

demo_rect();
translate([0, 20, 0]) demo_circle();
translate([0, 30, 0]) demo_bezier();
translate([0, 60, 0]) demo_polybezier();
translate([0, 120, 0]) scale([0.4, 0.4, 1]) demo_polybezier2();
translate([0, 80, 0]) demo_polybezier3();

module demo_circle() {
    polygon(circle_points(r=3));
    translate([10, 0]) polygon(circle_points(r=3, a1=45, a2=270));
    translate([20, 0]) polygon(circle_points(r=3, fn=8));
    translate([30, 0]) polygon(circle_points(r=3, a1=45, a2=270, fn=8));
}

module demo_rect() {
    polygon(rect_points([10, 15], center=true));
    translate([15, 0]) polygon(rect_points([10, 15]));
    translate([30, 0]) polygon(rect_points([10, 15], r=4));
    translate([45, 0]) polygon(rect_points([10, 15], r=4, r3=0, r4=2));
}

module demo_bezier() {
    seg1=[[0,0], [0, 10], [10, 10], [10, 0]];
    seg2=[[0,0], [-5, 10], [15, 10], [10, 0]];
    seg3=[[0,0], [-5, 5], [15, 15], [10, 0]];
    seg4=[[0,0], [0, 10], [5, 15], [10, 10], [10, 0]];

    color([0.9,0.4,0.9]) polygon(seg1);
    linear_extrude(height=2) polygon(bezier_points(seg1));

    translate([15, 0, 0]) {
        color([0.9,0.4,0.9]) polygon(seg1);
        linear_extrude(height=2) polygon(bezier_points(seg1, fn=5));
    }

    translate([35, 0, 0]) {
        color([0.9,0.4,0.9]) polygon(seg2);
        linear_extrude(height=2) polygon(bezier_points(seg2));
    }

    translate([60, 0, 0]) {
        color([0.9,0.4,0.9]) polygon(seg3);
        linear_extrude(height=2) polygon(bezier_points(seg3));
    }

    translate([80, 0, 0]) {
        color([0.9,0.4,0.9]) polygon(seg4);
        linear_extrude(height=2) polygon(bezier_points(seg4));
    }
}

module demo_polybezier() {
    segments=[
        [[0, 0], [0, 10], [10, 10], [10, 0]],
        [[10, 0], [5, -10], [20, -5], [20, 0]],
        [[20, 0], [15, 10], [35, 10], [30, 0]],
        [[30, 0], [20, -10], [35, -15], [45, -10], [40, 0]]
    ];

    color([0.4,0.9,0.9]) polygon(segments[0]);
    color([0.9,0.4,0.9]) polygon(segments[1]);
    color([0.9,0.9,0.4]) polygon(segments[2]);
    color([0.4,0.4,0.9]) polygon(segments[3]);
    linear_extrude(height=2)
        polygon(polybezier_points(segments, fn=100));
}

module demo_polybezier2() {
    segments=[
        [[24.5, 4.5], [27, 20]],
        [[27, 20], [35, 29.5]],
        [[35, 29.5], [44.5, 44], [42, 44], [41, 46]],
        [[41, 46], [29, 56], [16, 73] , [3, 85]], // затылок
        [[3, 85], [10, 93], [28, 98], [51, 102.5]],
        [[51, 102.5], [55.5, 95], [60, 88], [64, 77.5]],
        [[64, 77.5], [64, 76], [65, 73], [66.5, 70]],
        [[66.5, 70], [67, 67.5], [69, 65], [69.2, 63.3]], // лоб
        [[69.2, 63.3], [69, 61.7], [70.3, 59.6], [71.7, 57.7]], // переносица
        [[71.7, 57.7], [72.8, 56.1], [73.9, 54.6], [74.1, 54.1]], // переносица
        [[74.1, 54.1], [75, 52.7], [73.5, 50.9], [72.1, 50.8]], // нос
        [[72.1, 50.8], [71.9, 50.4], [72, 49.6], [72.5, 48.9]],  // верхняя губа
        [[72.5, 48.9], [72.5, 48.4], [72.3, 47.3], [71.5, 47.2]], // верхняя губа
        [[71.5, 47.2], [72, 46.9], [72.3, 46.8], [72.1, 45.5]], // нижняя губа
        [[72.1, 45.5], [71.4, 45.2], [71.1, 45], [71.4, 44.3]], // нижняя губа
        [[71.4, 44.3], [72.9, 39.8], [69.8, 39.2], [68.1, 39.6]], // подбородок
        [[68.1, 39.6], [66.2, 39.9], [65.2, 39.7], [64.7, 39.6]], // шея
        [[64.7, 39.6], [63.3, 39.5], [60.5, 40.2], [59.7, 36.5]], // шея
        [[59.7, 36.5], [58.8, 34.8], [58.3, 34.1], [57.5, 33]], // шея
        [[57.5, 33], [56.1, 30.2], [54.3, 26.9], [52.3, 24.4]], // шея
        [[52.3, 24.4], [51.3, 21.5], [52.6, 20.9], [53.1, 18.7]], // яремная ямка
        [[53.1, 18.7], [53.4, 17.7], [53.1, 16.9], [53.1, 16.3]], // грудь
        [[53.1, 16.3], [54.1, 15.4], [54.5, 12], [55.1, 9.5]], // грудь
        [[55.1, 9.5], [52, 5.5], [49.5, 5], [47, 2.5]],
        [[47, 2.5], [24.5, 4.5]]
    ];

    //for(seg=[0:len(segments)-1])
    //    color([0.4, 0.9, 0.9]) polygon(segments[seg]);
    linear_extrude(height=2)
        polygon(polybezier_points(segments));
    translate([80, 0, 0]) linear_extrude(height=2)
        polygon(polybezier_points(segments, fn=5));
    translate([160, 0, 0]) linear_extrude(height=2)
        polygon(polybezier_points(segments, fn=2));
}

module demo_polybezier3() {
    // point array generated with https://www.thingiverse.com/thing:2805184
    segments=[
        [[9.85, 32.61], [8.93, 32.78], [-7.73, 9.26], [33.94, 1.15]],
        [[33.94, 1.17], [34.94, 1.28], [36.78, 1.16], [38.40, 0.92]],
        [[38.40, 0.92], [40.48, 0.62], [42.02, 0.74], [43.46, 0.54]],
        [[43.46, 0.54], [44.95, 0.29], [45.50, 1.23], [45.33, 2.00]],
        [[45.33, 2.00], [44.28, 3.75], [41.93, 4.39], [39.91, 4.37]],
        [[39.91, 4.37], [10.75, 6.27], [4.60, 25.84], [15.62, 26.50]],
        [[15.62, 26.50], [16.70, 25.83], [17.50, 25.11], [19.31, 24.60]],
        [[19.31, 24.60], [18.18, 21.61], [16.94, 18.64], [17.65, 15.34]],
        [[17.65, 15.34], [17.65, 15.34], [18.36, 15.80], [18.36, 15.80]],
        [[18.36, 15.80], [20.54, 21.27], [22.37, 22.98], [24.20, 24.84]],
        [[24.20, 24.84], [26.20, 24.88], [28.24, 24.85], [29.32, 26.73]],
        [[29.32, 26.73], [33.60, 25.22], [31.10, 18.28], [40.93, 17.00]],
        [[40.93, 17.00], [41.46, 17.10], [41.16, 17.39], [41.16, 17.68]],
        [[41.16, 17.68], [36.73, 21.13], [38.02, 24.79], [33.74, 26.49]],
        [[33.74, 26.49], [33.15, 27.17], [33.54, 27.83], [33.72, 28.28]],
        [[33.72, 28.28], [36.52, 30.01], [37.34, 28.89], [42.83, 33.88]],
        [[42.83, 33.88], [45.50, 36.16], [47.66, 36.41], [49.45, 37.96]],
        [[49.45, 37.96], [49.81, 38.34], [49.44, 38.58], [48.58, 38.53]],
        [[48.58, 38.53], [39.95, 37.46], [37.64, 33.11], [28.30, 37.03]],
        [[28.30, 37.03], [29.32, 38.71], [30.79, 39.88], [32.62, 40.77]],
        [[32.62, 40.77], [32.60, 40.93], [32.82, 41.17], [32.20, 41.18]],
        [[32.20, 41.18], [29.24, 40.84], [26.37, 38.89], [24.85, 37.53]],
        [[24.85, 37.53], [19.21, 38.28], [15.80, 36.80], [12.83, 34.89]],
        [[12.83, 34.89], [9.24, 38.20], [5.35, 39.42], [0.99, 40.88]],
        [[0.99, 40.88], [0.36, 41.00], [0.65, 40.11], [0.71, 40.09]],
        [[0.71, 40.09], [1.88, 38.81], [2.73, 38.41], [4.14, 37.51]],
        [[4.14, 37.51], [5.88, 36.39], [7.95, 33.75], [9.85, 32.61]],
        [[9.85, 32.61], [9.85, 32.61], [9.85, 32.61], [9.85, 32.61]],
        [[9.85, 32.61], [9.85, 32.61], [9.85, 32.61], [9.85, 32.61]]
    ];

    //for(seg=[0:len(segments)-1])
    //    color([0.4, 0.9, 0.9]) polygon(segments[seg]);

    linear_extrude(height=2)
        polygon(polybezier_points(segments));

    translate([60, 0, 0]) linear_extrude(height=2)
        polygon(polybezier_points(segments, fn=6));
}

/**
 * Окружность или дуга.
 *
 * Для полной окружности: a1=0, a2=360
 *
 * @param r радиус окружности
 * @param a1 начальный угол дуги
 *     (по умолчанию: 360)
 * @param a2 конечный угол дуги
 *     (по умолчанию: 360)
* @param shift смещение по X и Y
 * @param fn количество сегментов на полной окружности
 *     (по умолчанию: 100)
 * @return массив точек [x,y] окружности или дуги
 */
function circle_points(r=1, a1=0, a2=360, shift=[0,0], fn=100) =
    a2 > a1 ?
        concat(
            circle_points(r=r, fn=fn, a1=a1, a2=a2-360/fn, shift=shift),
            [[r*cos(a2)+shift.x, r*sin(a2)+shift.y]]
        ) :
        [[r*cos(a1)+shift.x, r*sin(a1)+shift.y]];

/**
 * Прямоугольник со скругленными углами.
 *
 * r2 r1
 * r3 r4
 *
 * @param dim размеры прямоугольника: [x, y]
 * @param center центрировать прямоугольник
 * @param r радиус скругления всех углов
 * @param r1 радиус скругления угла 1 (право, верх)
 * @param r2 радиус скругления угла 2 (лево, верх)
 * @param r3 радиус скругления угла 3 (лево, низ)
 * @param r4 радиус скругления угла 4 (право, низ)
* @param shift смещение по X и Y
 * @param fn количество сегментов на скруглениях окружности
 *     (по умолчанию: 100)
 * @return массив точек [x,y] прямоугольника

 */
function rect_points(dim=[1,1], center=false,
        r=0, r1=-1, r2=-1, r3=-1, r4=-1,
        shift=[0,0], fn=100) =
    concat(
        // право, верх
        (r == 0 && r1 < 0) || r1==0 ?
            [[dim.x - (center?dim.x/2:0) + shift.x, dim.y - (center?dim.y/2:0) + shift.y]] :
            circle_points(
                r=(r1>0?r1:r), a1=0, a2=90,
                shift=[
                    dim.x-(r1>0?r1:r) - (center?dim.x/2:0) + shift.x,
                    dim.y-(r1>0?r1:r) - (center?dim.y/2:0) + shift.y],
                fn=fn),
        // лево, верх
        (r == 0 && r2 < 0) || r2==0 ?
            [[0 - (center?dim.x/2:0) + shift.x, dim.y - (center?dim.y/2:0) + shift.y]] :
            circle_points(
                r=(r2>0?r2:r), a1=90, a2=180,
                shift=[
                    (r2>0?r2:r) - (center?dim.x/2:0) + shift.x,
                    dim.y-(r2>0?r2:r) - (center?dim.y/2:0) + shift.y],
                fn=fn),
        // лево, низ
        (r == 0 && r3 < 0) || r3==0 ?
            [[0 - (center?dim.x/2:0) + shift.x, 0 - (center?dim.y/2:0) + shift.y]] :
            circle_points(
                r=(r3>0?r3:r), a1=180, a2=270,
                shift=[
                    (r3>0?r3:r) - (center?dim.x/2:0) + shift.x,
                    (r3>0?r3:r) - (center?dim.y/2:0) + shift.y],
                fn=fn),
        // право, низ
        (r == 0 && r4 < 0) || r4==0 ?
            [[dim.x - (center?dim.x/2:0) + shift.x, 0 - (center?dim.y/2:0) + shift.y]] :
            circle_points(
                r=(r4>0?r4:r), a1=270, a2=360,
                shift=[
                    dim.x-(r4>0?r4:r) - (center?dim.x/2:0) + shift.x,
                    (r4>0?r4:r) - (center?dim.y/2:0) + shift.y],
                fn=fn)
    );

// Bezier curve by Christian Limberg
// http://climberg.de/page/openscad-implementation-of-bezier-curves-of-any-degrees/

function _bezier_choose(n, k)=
    k == 0 ? 1 : (n * _bezier_choose(n - 1, k - 1)) / k;

function _point_on_bezier_rec(points, t, i, c)=
    len(points) == i || len(points) == undef ? c :
        _point_on_bezier_rec(points, t, i+1, c+_bezier_choose(len(points)-1, i) *
            pow(t, i) * pow(1-t, len(points)-i-1) * points[i]);

function _point_on_bezier(points, t)=
    _point_on_bezier_rec(points, t, 0, [0,0]);

/**
 * A bezier curve with any number of control points.
 *
 * @param points the control points of the bezier curve
 *     (number of points is variable)
 * @param fn fragment number - the sampling resolution of the bezier curve
 *     (number of segments on the curve, default: 100)
 * @return array of points for bezier curve
 */
function bezier_points(points, fn=100)=[
    // this looks like onenscad bug:
    // if you generate list with step=0.1: [0:0.1:1],
    // you will get [0, 0.1, 0.2, 0.3 ... 1]
    // but if you generate list with step=0.01 [0:0.01:1],
    // you will get [0, 0.01, 0.02, 0.03 ... 0.99] (no 1 at the end)
    // so add small delta which is less than step: delta=1/fn/2
    for (t =[0:1.0/fn:1+(1/fn/2)]) _point_on_bezier(points, t)
];

function _polybezier_points(segments, fn=100, seg_n)=
    seg_n == 0 ? bezier_points(segments[0], fn) :
        concat(
            _polybezier_points(segments, fn=fn, seg_n=seg_n-1),
            bezier_points(segments[seg_n], fn)
        );

/**
 * Composite bezier curve.
 *
 * @param segments array of segments, each segment is an array of
 *     control points for bezier curve
 * @param fn number of fragments per each segment
 * @return array of points for composite bezier curve
 */
function polybezier_points(segments, fn=100)=
    _polybezier_points(segments, fn=fn, seg_n=len(segments)-1);

```


[User]
I'm looking for a parametric OpenSCAD design for a dowel holder. I need it to have a cylindrical section that holds the dowel, and optionally a flange at the base that can be used to mount the holder.

Here's what I need to be able to customize:

*   **Dowel Diameter:** I need to be able to specify the diameter of the dowel that the holder will hold. I'll probably want to add a small amount for clearance.
*   **Dowel Holder Height:** The height of the cylindrical part that holds the dowel.
*   **Dowel Wall Thickness:** The thickness of the material surrounding the dowel hole.
*   **Flange Diameter:** The diameter of the mounting flange. If this is set to 0, then no flange will be created.
*  **Flange Height:** The height of the flange.
*   **Flange Mounting Hole Diameter:** I need to be able to specify the diameter for mounting holes in the flange.  If this is set to 0, no holes will be generated.  I would like the flange holes to be evenly spaced around the center circle, and ideally 3 of them.

I would like the dowel holder to have a cylindrical shape, with the circular hole for the dowel in the center, and the flange to also be a circle. The flange, if enabled, should be flush with the bottom of the dowel holding cylinder. I will want to be able to generate 3D printable stls with this design, so a smooth cylinder with a high `$fn` value is important.

I'm not sure if this would be best as a single OpenSCAD file, or multiple linked files, so whatever you think would be best is fine. Let me know if you need any additional information.

[Assistant]
dowel-holder.scad:
```
// The diameter of the dowel hole in mm (you may want to add a mm or two for clearance)
dowel_d = 13;

// The diameter of the flange for mounting the dowel holder (in mm)
flange_d = 0;

/* [Dowel Customization] */

// The height of the dowel holder in mm (inclusive of the height of the flange)
dowel_h = 20;

// The thickness of the wall holding the dowele in mm
dowel_wall = 5;

/* [Flange Customization] */

// The height of the flange in mm
flange_h = 4;

// The diameter (in mm) for the holes placed for mounting the holder (0 disables the holes)
flange_hole_d = 6;

/* [Hidden] */

holder_d = dowel_d + dowel_wall*2;
$fn = 128;

module holder() {
    difference() {
        union() {
            cylinder(d = holder_d, h=dowel_h);
            translate([0, -holder_d/2, 0]) cube([dowel_d/2 + dowel_wall, holder_d, dowel_h]);
        }
        translate([0, 0, flange_h]) union() {
            cylinder(d=dowel_d, h=100);
            translate([0, -dowel_d/2, 0]) cube([100, dowel_d, 100]);
        }
    }
}

module flange() {
    difference() {
        cylinder(d = flange_d, h = flange_h);
        if (flange_hole_d > 0) {
            for (xy = [ [0, 1], [-1, 0], [0, -1] ]) {
                delta = (holder_d + (flange_d - holder_d)/2)/2;
                translate([xy[0] * delta, xy[1] * delta, 0]) cylinder(d=flange_hole_d, h=100);
            }
        }
    }
}

holder();
if (flange_d > 0) {
    flange();
}
```


[User]
I'm looking to create a fully articulated watch band that can be 3D printed in place, similar to the design I saw. I'd like to be able to customize a few key parameters.

Specifically, I need:

*   **Number of Links:** A parameter to control the total number of regular links in the band.
*   **Print Tolerance:** A parameter to adjust the spacing between moving parts to account for print tolerances.
*   **Link Width:** A parameter to set the width of the links, which should match the watch's lug width.
*   **Link Height:** A parameter to control the height of the links.
*   **Link Length:** A parameter to set the length of each individual link.

The band should include:

*   **Regular Links:** The main body of the band, with rounded ends to allow for articulation.
*   **Lug Links:** Specialized links to attach the band to the watch, with holes for lug pins.
*   **Clasp:** A two-part clasp mechanism with a simple button closure.

The links should be designed with the correct spacing to allow the cylindrical hinge pins to pass through, as well as allow for articulation. All holes for pins should include print tolerance.

I'd also like the design to be parametric so that these measurements can easily be adjusted, so I'd like an OpenSCAD file (or multiple files) that will allow me to do this. I'm not particular about the specific file structure, but do think that it will be helpful to use a library for any helper functions that will assist with this. I am primarily familiar with using the BOSL2 library, but am open to suggestions if you think that another library would be better for this design.

[Assistant]
watchband.scad:
```
//the total number of regular links in the bracelet
num_links = 8; // [2:20]

//the space added between moving parts to account for print tolerance
print_tolerance = 0.3; // [0:0.05:1.0]

//the width of the links (should be your lug width)
link_width = 19; // [16:0.5:28]

//the height of the links
link_height = 5;

//the length of each individual link
link_length = 12;

bar_offset = 1;
lug_pin_radius = (1.8 + print_tolerance) / 2;
$fn = 64;

/*
#-#-#  <-- sideA end
#####  <-- base shape
 # #   <-- sideB end
*/

// base shape of the link
module link_base() {
    union() {
        // base shape
        cube([link_width, link_length, link_height]);

        // sideA rounded end
        translate([0, 0, link_height/2]) rotate([0, 90, 0])
            cylinder(h = link_width, r=link_height/2, center = false);

        // sideB rounded end
        translate([0, link_length,link_height/2]) rotate([0, 90, 0])
            cylinder(h = link_width, r=link_height/2, center = false);
    }
}

module link_sideA() {
    // spacing of slots
    spacing = link_width / 5;

    for(i = [0 : 1]) {
        difference() {
            // sleeve
            translate([spacing + (2 * (i * spacing)) - print_tolerance, 0, link_height / 2]) rotate([0, 90, 0])
                cylinder(h = spacing + (print_tolerance * 2), r = link_height / 2 + print_tolerance, center = false);

            // bar
            translate([spacing + (2 * (i * spacing)) - print_tolerance, 0, 2.5]) rotate([0, 90, 0])
                cylinder(h = spacing + (print_tolerance * 2), r = (link_height / 2) - bar_offset - print_tolerance, center = false);
        }
    }

}

module link_sideB() {
    // spacing of slots
    spacing = link_width / 5;

    // sideB end bore
    translate([0, link_length,link_height/2]) rotate([0, 90, 0])
        cylinder(h = link_width, r=link_height/2 - bar_offset, center = false);

    // sideB end slots
    for(i = [0 : 2]) {
        translate([2 * (i * spacing), link_length, link_height / 2]) rotate([0, 90, 0])
            cylinder(h = spacing, r = link_height / 2 + print_tolerance, center = false);
    }
}

module link () {
    difference() {
        link_base();
        link_sideA();
        link_sideB();
    }
}

module lug_link() {
    difference() {
        link_base();
        link_sideB();

        // bore for lug pin
        translate([0, 0, link_height/2]) rotate([0, 90, 0])
            cylinder(h = link_width, r = lug_pin_radius, center = false);
    }
}

button_offset = 0.15;
module sideA_clasp() {
    difference() {
        union() {
            link_base();
            cube([link_width, link_length * 1.5, link_height]);
        }
        link_sideA();
        translate([0, link_length / 2 - print_tolerance, link_height/2]) cube([link_width, link_length + print_tolerance, link_height / 2]);

        // button hole
        translate([link_width / 2, link_length, 0]) cylinder(h = link_height/4, r1 = link_length/3 - button_offset, r2 = link_length/3, center = false);
        translate([link_width / 2, link_length, link_height/4]) cylinder(h = link_height/4, r1 = link_length/3, r2 = link_length/3 - button_offset, center = false);
    }
}

module sideB_clasp() {
    union() {
        difference() {
            union() {
                link_base();
                cube([link_width, link_length * 1.5, link_height]);
            }
            link_sideA();
            translate([0, link_length / 2 - print_tolerance, link_height/2]) cube([link_width, link_length + print_tolerance, link_height / 2]);
        }

        // button
        difference() {
            union() {
                translate([link_width / 2, link_length, link_height / 2]) cylinder(h = link_height/4, r1 = link_length/3 - button_offset, r2 = link_length/3, center = false);
                translate([link_width / 2, link_length, 3* link_height / 4]) cylinder(h = link_height/4, r1 = link_length/3, r2 = link_length/3 - button_offset, center = false);
            }
            // slot
            translate([link_width / 2, link_length, link_height * (3/4)])  cube([2, link_length, link_height / 2], center = true);
        }
    }
}

//link();

// build the bracelet

// sideA side
translate([0, 0, 0]) {
    lug_link();
    sideA_links = ceil(num_links / 2);
    for(i = [1 : sideA_links]) {
        translate([0, i * link_length, 0]) link();
    }
    translate([0, (sideA_links + 1) * link_length, 0]) sideA_clasp();
}

// sideB side
translate([link_width + 10, 0, 0]) {
    lug_link();
    sideB_links = floor(num_links / 2);
    for(i = [1 : sideB_links]) {
        translate([0, i * link_length, 0]) link();
    }
    translate([0, (sideB_links + 1) * link_length, 0]) sideB_clasp();
}

```


[User]
I need an OpenSCAD design for a single battery holder, specifically for a Pentax DL-I109 battery. I've got some rough dimensions to start with but I'd like it to be parametric so I can tweak it if needed.

Here's a breakdown of what I'm looking for:

*   **Battery Dimensions:**
    *   Width: 36.5 mm
    *   Depth: 60 mm
    *   Height: 15.5 mm
*   **Wall Thickness:** I want a consistent wall thickness of 2 mm.
*   **Contact Cutout:** There needs to be a cutout in the base to allow for the battery contacts.  The cutout should reduce the battery depth by 25mm from the back.
*  **Locking Mechanism:**  I'd like a locking mechanism on one of the longer sides of the battery holder that's 20mm deep into the battery area. I don't need anything too fancy, just something to keep the battery from sliding out. I'm imagining some sort of raised edge, maybe 2mm high and 4mm deep.

I'd like the design to be a single piece, printable as-is. I am okay with using the difference() module, that will make it easier for me to read.  I am open to different ideas on how to do the locking part if you think there's a better approach. I'm assuming basic OpenSCAD functionality, I don't need anything from extra libraries.

[Assistant]
Battery.scad:
```
battery_w = 36.5;
battery_d = 60;
battery_h = 15.5;
wall_tick = 2;
battery_contact_d  = 25;

lock_d    = 20;
look_sw   = 2;
look_sd   = 4;

union()
{
    //translate([0,0, wall_tick])
    cube([wall_tick, look_sd, battery_h + wall_tick*2], false);

    translate([wall_tick, look_sd/2, (battery_h + wall_tick*2)/2 ])
        sphere(d = look_sd, $fn = 50);

    translate([0,look_sd,0])
        difference()
        {
            cube([battery_w + wall_tick*2,battery_d+ wall_tick,battery_h+ wall_tick*2], false);
            translate([wall_tick,0,wall_tick])
            {
                #cube([battery_w,battery_d,battery_h], false);
                #cube([battery_w,battery_d-battery_contact_d,battery_h+wall_tick], false);
            }

             // Lock
            translate([wall_tick,0,0])
                #cube([battery_w,lock_d,battery_h+wall_tick], false);
        }
}
```


[User]
Hey, I'm looking for some help designing a snap-action clasp for round rods. I've seen some cool designs online, but I need something that's fully parametric so I can adjust it for different rod sizes and thicknesses.

Basically, I want a clasp that can grip a round rod and be attached to another object. It should be a single piece design, printable without supports, and have a captive clasp so it doesn't fall off. It should rely on a snap-action to hold onto the rod. The design should include a main body that's meant to be attached to another object via a union operation, a cylindrical shell where the rod will sit, and a snap clasp that pivots to grab the rod.

Here's a breakdown of what I'm thinking:

*   **Rod Diameter:** The design should be parametric, allowing the user to specify the diameter of the rod to be held.
*   **Clasp Width:** The design should be parametric, allowing the user to specify the width/height of the clasp.
*   **Clasp Thickness:** Parametric so it can be thickened if it breaks.
*  **Clearances:** The design should use parametric tolerances to ensure the clasp moves smoothly and can close/open easily. I'd like a parameter to control this.
*   **Straight Edges Option:** I'd love an option to include flat, straight edges on the base of the clasp to make it easier to combine with other shapes. This should be toggle-able with a variable.
*   **Captive Clasp:** The clasp should be connected to the main body using a pin or hinge, ensuring that it doesn't fall off. The pin or hinge needs to be parametric, with the pin having a diameter and height and the hinge being defined by that pin. I need a parameter for the clearance between the captive clasp and the "main body."
*   **Locking Nub:** The clasp should have a locking nub that provides the snap-action, holding onto the rod. It should be parametrically adjustable.
*   **Attachment Point:** The main body of the clasp should be a flat surface where the user can attach other shapes and designs via union.
*   **Preview Rod:** It'd be nice if it included a preview of the rod being held, for visual checks.

I don't want to use any external libraries for this, it should all be written from scratch.  Could you help me design this in OpenSCAD? I'd really appreciate it if the design was well-commented and easy to modify. I'm envisioning this as being broken into multiple modules/functions so it can be easily understood and adjusted.

Let me know if you need any other info or if I can clarify anything.

[Assistant]
rod_clasp.scad:
```
//
// Rod Clasp
// Design by Marius Gheorghescu (mgx), May 2018
//

// width of the clasp (mm)
clasp_height = 16;

// diameter of the rod (mm)
rod_diameter = 12;

// clasp thickness (increase if it breaks)
thickness = 2.4;

// Flat & Square - add straight edges for easy remixing
straight_edges = 1; // [1: Yes, 0: No]

/* [Hidden] */

epsilon = 0.001;

pin_dia = 3 + thickness;

binding_tolerance = 0.45;

module clasp(width, rod_dia=8, rod_offset)
{
    $fn=20;
    height = width;
    capture_dia = rod_offset + rod_dia/2 - thickness*.25;
    over_angle = -12;

    // captive pin
    hull() {
        cylinder(r=thickness/2, h=height, center=true);
        cylinder(r=pin_dia/2, h=height*0.7, center=true);
    }

    // clasp
    translate([0, capture_dia/2 + thickness/2, 0])
    difference() {
        cylinder(r=capture_dia/2 + thickness, h=height, $fn=50, center=true);
        cylinder(r=capture_dia/2, h=height+epsilon, $fn=30, center=true);

        translate([thickness/2, -capture_dia/2 - thickness/2, 0])
            cube([thickness, 2*thickness, height+epsilon], center=true);

        // half the clasp cylinder
        rotate([0,0,over_angle])
        translate([capture_dia/2 + pin_dia/2 + 2, 0,0])
            cube([capture_dia + 2*thickness, capture_dia + 2*thickness, height+epsilon], center=true);

    }

    // locking nub
    translate([0, capture_dia/2, 0])
    rotate([0,0, over_angle])
    translate([thickness/2, capture_dia/2 + thickness, 0])
        cylinder(r=thickness, h=height, center=true);
}

module clasp_outset(width, rod_dia, rod_offset)
{
    $fn=12;

    if (1) {
        minkowski() {
            clasp(width, rod_dia, rod_offset);
            sphere(r=binding_tolerance);
        }
    } else {

        scale([1.3, 1.3, 1.1]) clasp(width, rod_dia, rod_offset);
    }
}

module rod_clasp(width=24, rod_dia=8)
{
    $fn=50;
    rod_offset = pin_dia/2 + thickness + rod_dia/2;

    difference() {

        // main clasp body
        hull() {
            cylinder(r=5, h=width-epsilon, center=true);

            // rod shell
            translate([0, rod_offset , 0])
                cylinder(r=rod_dia/2 + thickness, h=width, center=true);

            // flat&square base
            if (straight_edges) {
                translate([rod_dia/4 + thickness/2, -pin_dia/2 - thickness, 0])
                    cube([rod_dia/2 + thickness, thickness, width], center=true);
            }
        }

        rotate([0,0,-5]) clasp_outset(width, rod_dia, rod_offset);
        rotate([0,0,20]) clasp_outset(width, rod_dia, rod_offset);

        // rod clearance
        translate([0, rod_offset , 0])
            cylinder(r=rod_dia/2, h=2*width, center=true);

        // rod
        %translate([0, rod_offset , 0])
            color([0,0.5,.5, 0.6])
            cylinder(r=rod_dia/2, h=3*width+epsilon, center=true);

        // clearance for rod buckle
        translate([0, rod_offset + rod_dia + thickness, 0])
            cube([2*rod_dia + 2*thickness, 2*rod_dia + 2*thickness, width+epsilon], center=true);

    }

    // clasp at the default print location
    rotate([0,0,10])
        clasp(width, rod_dia, rod_offset);

    // guide: locked clasp
    rotate([0,0,0])
        % color([0.9,0.4,0.7,0.55]) scale(0.99) clasp(width, rod_dia, rod_offset);

}

intersection() {rod_clasp(clasp_height, rod_diameter); /*translate([0, 0, -50]) cube([100,100,100], center=true);*/}

```


[User]
I need a design for a PTFE tubing cutting guide. Basically, it's a block with a channel for the tube and a slot for a razor blade so you can get a nice, square cut.

Here are the important parameters:

*   **Tube Diameter:** This will be the inner diameter of the PTFE tube, obviously. I'd like to be able to change this (default 4.5 mm).
*   **Blade Thickness:** This is the width of the slot the razor blade will go in. This needs to be configurable (default 1 mm).
*   **Wall Thickness:** The thickness of the material around the tube channel and blade slot (default 2 mm).
*   **Base Thickness:** The thickness of the base of the block (default 5 mm).
*   **Corner Radius:** I want to round off some corners where the blade slot meets the main body - I'll need to change this (default 4 mm).

The design should have a rectangular base, with a half-cylinder-shaped channel for the PTFE tube running along its length. The blade slot should run perpendicular to the tube channel, intersecting it, and go through the base. I'm picturing a 'T' shape, where the tube channel is the top of the 'T' and the blade slot is the stem.

I also want the tube channel to have a slightly larger opening than the tube diameter, for easier insertion, and the blade slot to be a bit wider than the actual blade thickness. The base should extend beyond the edges of both channels.

Please also echo the calculated sizes of the tube guide and blade guide diameters, as well as the base size, so that they can be seen in the output.

I will need to be able to adjust all of these parameters, so it needs to be parametric in OpenSCAD.

[Assistant]
ptfe_cutting_guide.scad:
```
// Diameter of hole for PTFE tube (mm)
tube_diameter = 4.5;
// Size of slot for blade (mm)
blade_thickness = 1;
// Corner Smoothness (higher is smoother)
$fn = 36;

/* [Hidden */

wall_thickness = 2;
base_thickness = 5;
corner_radius = 4;

tube_guide_thickness = tube_diameter + (wall_thickness * 2);
blade_guide_thickness = blade_thickness + (wall_thickness * 2);
base_size = max(20, tube_guide_thickness * 2);

echo("tube guide diameter", tube_guide_thickness);
echo("blade guide diameter", blade_guide_thickness);
echo("base size", base_size);

//cube([base_size, base_size, base_thickness]);

difference()
{
    union()
    {
        cube([base_size - blade_guide_thickness, base_size, base_thickness]);
        #translate([0, (base_size - tube_guide_thickness) / 2 , base_thickness]) tube_guide();
        #translate([base_size - blade_guide_thickness, 0, 0]) blade_guide();
    }
    translate([-1, base_size /2, base_thickness + wall_thickness + (tube_diameter / 2)]) tube_hole();
}

module tube_guide()
{
    cube([base_size - blade_guide_thickness, tube_guide_thickness, tube_guide_thickness / 2]);
    translate([0, tube_guide_thickness / 2, tube_guide_thickness / 2  ]) rotate([0, 90, 0]) cylinder(d = tube_guide_thickness, h = base_size - blade_guide_thickness);
}

module tube_hole()
{
    union()
    {
    rotate([0, 90, 0]) cylinder(d = tube_diameter, h = base_size + 2);
    rotate([0, 90, 0]) cylinder(d = tube_diameter + 1, d2 = tube_diameter, h = 2);
    translate([base_size - wall_thickness + (blade_thickness / 2), 0, 0]) rotate([0, 90, 0]) cylinder(d = tube_diameter + 1, d2 = tube_diameter, h = blade_thickness);
    }
}

module blade_guide()
{
    difference()
    {
        hull()
        {
        cube([blade_guide_thickness, base_size, base_thickness]);
        translate([0, corner_radius, base_thickness + tube_guide_thickness - corner_radius]) rotate([0, 90, 0]) cylinder(r = corner_radius, h = blade_guide_thickness);
        translate([0, base_size - corner_radius, base_thickness + tube_guide_thickness - corner_radius]) rotate([0, 90, 0]) cylinder(r = corner_radius, h = blade_guide_thickness);
        }
        translate([(blade_guide_thickness - blade_thickness) / 2, -1, base_thickness]) cube([blade_thickness, base_size + 2, base_thickness + tube_guide_thickness]);
    }
}
```


[User]
I'd like to design a simple six-bladed fan for small motors, and I'm hoping you can help me generate the OpenSCAD code. I've got some ideas about how it should be constructed and the parameters I'd like to control.

Essentially, the fan should have a central hub with six blades extending outwards at an angle. Here's what I'm thinking for parameters:

*   **`blade_length`**: This will control the length of each blade from the hub. I envision a range of about 20 to 100.
*   **`blade_width`**: The width of each blade, probably between 5 and 10 units.
*   **`axe_diameter`**: This is the diameter of the hole in the center for the motor shaft. I expect this will be quite small, maybe 2 to 10.
*   **`hub_diameter`**: The diameter of the central hub where the blades are attached. A range of 10 to 30 might work well.
*   **`angle`**: This is the angle of each blade relative to the horizontal plane when looking from the side (and thus not the angle relative to the fan plane). I'd like to control this angle; 30 to 60 degrees seems like a good range to avoid needing support during printing.
*   **`shrink`**: This is for material shrinkage compensation when 3D printing. I'd like to be able to adjust this as well, starting at around 1.1 but probably needing to be adjusted based on my printer.

The general idea would be to create a central cylinder for the hub, then rotate and attach a blade shape at six different locations around the circumference. I'm thinking a good approximation for the blades would be to use a linearly extruded, scaled circle. Finally, I need to cut out the central hole for the motor shaft, using the `axe_diameter`.

Also, because it's a fan, the blades will have a height based on their width and angle. If the blade_width is `bw` and the angle is `a`, the height should be approximately `bw * 2.5 * cos(a)`.

Finally, I want to make sure I can adjust each parameter individually using the OpenSCAD customizer.

Could you generate the OpenSCAD file to achieve this design? I am not using any external libraries.

[Assistant]
six_blade_fan.scad:
```
// Diameter of the fan
blade_length=60; // [20:100]
// Width of a blade
blade_width=7; //[5:10]
// Diameter of the axe
axe_diameter=2;  // [2:10]
// Diameter of the center hub
hub_diameter=18; // [10:30]
// Angle of the blades
angle=45; // [30:60]

// compensate material shrink
shrink=1.1+0;
height=blade_width*2.5*cos(angle);

propeller();
//blade();

 module propeller(){

  difference(){
    union(){
      cylinder(d=hub_diameter,h=height,$fn=100);
      for(i=[0:60:360])
        rotate([0,0,i])
            blade();
    }
    cylinder(d=axe_diameter*shrink,h= 8,$fn=40);
  }

 }

 module blade(){
   translate([0,0,height/2])
   rotate([90,angle,0])
    linear_extrude(height=blade_length/2-2)
      scale([0.2,2.5])
        circle(d=blade_width,$fn=50);
   }
```


[User]
Okay, I'm looking to create a customizable filament spool storage system using OpenSCAD. I've seen a bunch of designs out there, but I want something that's really tailored to my needs and flexible. I'd like to be able to configure it for different spool sizes and layouts.

Specifically, I need to be able to define:

*   **Spool Dimensions:** The outer diameter and the inside height of the filament spools I'll be using, as well as the difference between these, which I'll call rack width.
*   **Number of Racks:**  How many individual spool holding sections will there be in each tier (e.g. 4 racks, meaning each rack will hold 1/4 of a circle)
*   **Number of Separators:** I'd like to be able to put dividers inside each rack to prevent spools from sliding together.
*   **Separator Height:** The height of those dividers, as a percentage of rack height.
*   **Number of Floors/Tiers:** How many levels of these racks should be stacked vertically.
*   **Single Print Option:** A way to just print a single rack for testing.
*   **Mirroring:** An option to mirror each rack so that left-right variants can be printed if needed.
*   **Handle:** I want a customizable handle, ideally either a hole or a grip. For the handle:
    *   **Handle Hole Size:** The diameter of the hole, if using the hole handle.  It should be able to be disabled by setting it to 0.
    *   **Handle Grip Size:** The length/diameter of the grip, if using the grip handle, again, disabling it if 0.
    *   **Grip Height:** The height of the grip as a percentage of rack height
    *   **Grip Width:** The width of the grip as a percentage of the grip size
*   **Hinge:** The design will need hinges. For the hinges:
    *   **Hinge Width:**  The total width of the hinge
    *  **Drill width:** The diameter of the hole in the hinge.
*   **Wall Thickness:** The thickness of the main structure.
*   **Explode Margin:**  A margin to make it easier to print all of the parts separately, with the final product assembled afterwards
*   **Resolution:** A setting for the fineness of the curved objects.

I'd like the code to be parametric, so that all of the values can be easily configured.

I'm thinking that using `rotate_extrude` will be useful to make the round portions.

Could you generate the OpenSCAD files for this? I'm not using any specific libraries.

[Assistant]
OpenSCAD_Spool_Drawer_Storage_Box.scad:
```
// Global parameters, specific for each spool brand
/*******************
*    ICE 0.75kg    *
* inner hole 54mm  *
*******************/
// Full size of spool
//spool_diameter=199;
// Inside height
//spool_height=50;
// Rack width = spool outside diameter - spool inside diameter
//rack_width=41;

/*******************
*    Sunlu 1kg     *
* inner hole 73mm  *
*******************/
// Full size of spool
//spool_diameter=200;
// Inside height
//spool_height=54;
// Rack width = spool outside diameter - spool inside diameter
//rack_width=61;

/*******************
*   Verbatim 1kg   *
* inner hole 51mm  *
*******************/
// Full size of spool
//spool_diameter=200;
// Inside height
//spool_height=61;
// Rack width = spool outside diameter - spool inside diameter
//rack_width=47;

/*******************
*      BQ 1kg      *
* inner hole 53mm  *
*******************/
// Full size of spool
//spool_diameter=190;
// Inside height
//spool_height=65;
// Rack width = spool outside diameter - spool inside diameter
//rack_width=44;

/* [Spool and Rack] */
// Full size of spool
spool_diameter=190;
// Inside height
spool_height=65;
// rack width = spool outside diameter - spool inside diameter
rack_width=44;

// Custom parameters, according to your needs
// Number of racks
rack_count=4; // [2,3,4,5,6]
// Number of separators in each rack
spacer_count=1; // [0,1,2,3,4]
// Spacer height (percent of rack height)
spacer_height=0.8; // [0:0.1:1]
// Number of floors
floor_count=1; // [1,2]
// Print only one rack ?
single_print = 1; // [0:false, 1:true]
// Mirror each rack
mirror_rack = 0;  // [0:false, 1:true]

/* [Handle and Hinge] */
// Handle (hole)
// Size of hole handle (0 = disabled)
handle_hole_size=20;

// Handle (grip)
// Size of grip handle (0 = disabled)
handle_grip_size=0; // 10
// Grip height (percent of rack height)
handle_grip_height=0.5; // [0:0.1:1]
// Grip width (percent of grip size)
handle_grip_width=0.8; // [0:0.1:1]

// Hinge
hinge_width=20;
drill_width=5; // [1:0.5:6]

/* [Advanced] */
// Global thickness
wall_thickness=1.5;
// Exploded view (recommended for printing)
explode_margin=4;

/* [Hidden] */
//$fa = 0.01; $fs = 0.01;
// Resolution
$fn = 100; // [1:100]

// Computed constants
spool_radius = spool_diameter/2;
hinge_radius = hinge_width/2;
hinge_angle = asin(hinge_radius/(spool_radius-hinge_radius));

// older versions of OpenSCAD do not support "angle" parameter for rotate_extrude
// this module provides that capability even when using older versions (such as thingiverse customizer)
module rotate_extrude2(angle=360, convexity=2, size=1000) {

    module angle_cut(angle=90, size=1000) {
        x = size*cos(angle/2);
        y = size*sin(angle/2);
        translate([0,0,-size])
        linear_extrude(2*size) polygon([[0,0],[x,y],[x,size],[-size,size],[-size,-size],[x,-size],[x,-y]]);
    }

    // support for angle parameter in rotate_extrude was added after release 2015.03
    // Thingiverse customizer is still on 2015.03
    angleSupport = (version_num() > 20150399) ? true*false : false; // Next openscad releases after 2015.03.xx will have support angle parameter
    // Using angle parameter when possible provides huge speed boost, avoids a difference operation

    if (angleSupport) {
        rotate_extrude(angle=angle,convexity=convexity)
            children();
    } else {
        rotate([0,0,angle/2]) difference() {
            rotate_extrude(convexity=convexity)
                children();
            angle_cut(angle, size);
        }
    }
}

module drill(width_1=10, width_2=10, height=10, hole=5) {
    difference() {
        translate ([0, 0, 0]) rotate ([-90, 0, 0]) cylinder (h=height, r1=width_1/2, r2=width_2/2);
        translate ([0, -0.1, 0]) rotate ([-90, 0, 0]) cylinder (h=height+0.2, r=hole/2);
    }
}

module sub_rack() {
    // Main rack
    rotate_extrude2(angle = 360/rack_count, convexity = 2, size=spool_radius+2)
    translate([spool_radius-rack_width, 0, 0])
    polygon(points=[
        [0,0],
        [0,(spool_height-1)/floor_count],
        [wall_thickness,(spool_height-1)/floor_count],
        [wall_thickness,wall_thickness],

        [rack_width-wall_thickness,wall_thickness],
        [rack_width-wall_thickness,(spool_height-1)/floor_count],
        [rack_width,(spool_height-1)/floor_count],
        [rack_width,0]]);
    // Wall
    if (rack_count>1) {
        // First
        translate([spool_radius-rack_width+1.1, 0, 0])
        cube([rack_width-2.2, wall_thickness, (spool_height-1)/floor_count]);
        // Second
        rotate([0, 0, 360/rack_count])
        translate([spool_radius-rack_width+1.1, -wall_thickness, 0])
        cube([rack_width-2, wall_thickness, (spool_height-1)/floor_count]);
    }
    // Spacer
    if (spacer_count>0) {
        for(spacer_nr = [0 : spacer_count-1]) {
            rotate([0, 0, (360/rack_count)/(spacer_count+1)*(spacer_nr+1)])
            translate([spool_radius-rack_width+1.1, 0, 0])
            cube([rack_width-2.2, wall_thickness, (spool_height-1)/floor_count*spacer_height]);
        }
    }
}

module handle_hole() {
    rotate([0, 90, 0])
    scale([1.25,1,1.25])
    sphere (r=handle_hole_size/2);
}

module handle_grip() {
    cube([handle_grip_size*2/3, handle_grip_size*2/3*handle_grip_width, (spool_height-1)/floor_count*handle_grip_height]);
    translate([handle_grip_size*2/3, (handle_grip_size*2/3*handle_grip_width)/2, 0])
    scale([1,handle_grip_width,1])
    cylinder(h=(spool_height-1)/floor_count*handle_grip_height, r=handle_grip_size*0.66/2);
}

module rack() {
    union() {
        difference() {
            // Main rack
            sub_rack();

            // Handle (hole)
            translate([spool_radius-1, handle_hole_size, (spool_height-1)/floor_count])
            handle_hole();

            // Hinge, drill hole
            rotate([0, 0, 360/rack_count-hinge_angle])
            translate ([spool_radius-hinge_radius, 0, -1])
            rotate([90, 0, 0])
            drill(width_1=hinge_width, width_2=hinge_width, height=(spool_height-1)/floor_count+2, hole=0);

            // Hinge, round corner
            rotate([0, 0, 360/rack_count-hinge_angle])
            translate ([spool_radius-hinge_radius, 0, -1])
            cube([hinge_width, hinge_width, (spool_height-1)/floor_count+2]);

            rotate([0, 0, 360/rack_count-wall_thickness])
            translate ([spool_radius-hinge_radius, 0, -1])
            cube([hinge_width/2, wall_thickness+1, (spool_height-1)/floor_count+2]);
        }

        // Handle (grip)
        translate([spool_radius-1-wall_thickness, wall_thickness, 0])
        handle_grip();

        // Hinge
        rotate([0, 0, 360/rack_count-hinge_angle])
        translate ([spool_radius-hinge_radius, 0, 0])
        rotate([90, 0, 0])
        drill(width_1=hinge_width, width_2=hinge_width, height=(spool_height-1)/floor_count, hole=drill_width);
    }
}

if (single_print) {
        mirror ([mirror_rack, 0, 0])
        rack();
} else {
    for (floor_nr = [0 : floor_count-1]) {
        for(rack_nr = [0 : rack_count-1]) {
            mirror ([mirror_rack, 0, 0])
            rotate([0, 0, 360/rack_count*rack_nr])
            translate([explode_margin/2, explode_margin/2, (spool_height-1)/floor_count*floor_nr+floor_nr*explode_margin])
                rack();
        }
    }
}

```


[User]
Hey! I'm looking to design a customizable knife block for my kitchen drawer, and I'd like to use OpenSCAD to create the design. I've got some specific requirements, and I'd also like the design to be parametric, so I can easily adjust it in the future.

Here's what I'm looking for:

First, the basic shape should be a rectangular prism. I want the ability to choose whether the edges are rounded or square. So, I need a parameter for that - let's call it `round_edges`, with a value of 0 for square edges, and 1 for rounded edges. If rounded, the radius should be a fraction of the overall height, say 0.2 times the `height`.

Second, since I have a smaller 3D printer, I want an option to split the block into two pieces that connect together using tabs. I need a parameter called `split_block`, with 0 for a single piece and 1 for two pieces.

Third, I want to be able to specify whether I'm working in millimeters or inches, and have that value converted to millimeters, since I know that OpenSCAD operates internally using mm. I'll need a parameter called `millimeters_or_inches` with 1 being millimeters, and 25.4 representing inches.

Fourth, I need to be able to control the number of blade slots, the length of the blade slots, and the width of those slots, and the length of the handle portion of the block. So, parameters named `blade_count`, `blade_length`, and `blade_width` for blade slots and `handle_length` for the handle portion. The blade slots should be created by subtracting a rectangular prism from the main block.

Fifth, I need to control the overall width and height of the knife block using the parameters `width` and `height`.

Finally, if the block is split, the tabs should have a configurable size, I guess. A parameter called `tab_scale` that scales the tab size by that amount would be great.

If the block is split, it should be split along the length, and I think that 80% of the length is a good place to put that split. The tabs should be placed such that they have a consistent amount of spacing between them across the width of the block, but the number of tabs should always be two. I need a tolerance, as well - say a 0.2 times the height that pads the edges of the block where those subtractions are occurring.

I think that's all. I'm looking for this to be as easily customizable as possible. I’m not planning to use any special libraries so this should be purely vanilla OpenSCAD code.

[Assistant]
knifeblock_split.scad:
```

//customizable options

// Round or square edges
round_edges = 1; // [0:Square Edges, 1:Rounded Edges]

// Split the block into 2 parts to make it fit on smaller printer beds
split_block = 1; // [0:Single Piece, 1:Two Pieces]

// Specify parameters in millimeters or inches. Export will always be in mm
millimeters_or_inches = 25.4; // [1:mm, 25.4:inches]

// Number of blade slots
blade_count = 2;
// Length of the blade slots
blade_length = 9;
// Width of the blade slots
blade_width = 0.125;

// Length of the handle portion
handle_length = 5.5;
// Width of the knife block
width = 2.5;
// Height of the knife block
height = 1;

// Scale of connector tabs (for split block only)
tab_scale = 0.95;

// hidden options
scaled_length = (blade_length + handle_length) * millimeters_or_inches;
scaled_width = width * millimeters_or_inches;
scaled_height = height * millimeters_or_inches;
scaled_blade_length = blade_length * millimeters_or_inches;
scaled_blade_width = blade_width * millimeters_or_inches;
$fs = 0.01*1;
buffer = 0.2*height;

module roundedcube(size = [1, 1, 1], center = false, radius = 0.5, apply_to = "all") {
	// If single value, convert to [x, y, z] vector
	size = (size[0] == undef) ? [size, size, size] : size;

	translate_min = radius;
	translate_xmax = size[0] - radius;
	translate_ymax = size[1] - radius;
	translate_zmax = size[2] - radius;

	diameter = radius * 2;

	module build_point(type = "sphere", rotate = [0, 0, 0]) {
		if (type == "sphere") {
			sphere(r = radius);
		} else if (type == "cylinder") {
			rotate(a = rotate)
			cylinder(h = diameter, r = radius, center = true);
		}
	}

	obj_translate = (center == false) ?
		[0, 0, 0] : [
			-(size[0] / 2),
			-(size[1] / 2),
			-(size[2] / 2)
		];

	translate(v = obj_translate) {
		hull() {
			for (translate_x = [translate_min, translate_xmax]) {
				x_at = (translate_x == translate_min) ? "min" : "max";
				for (translate_y = [translate_min, translate_ymax]) {
					y_at = (translate_y == translate_min) ? "min" : "max";
					for (translate_z = [translate_min, translate_zmax]) {
						z_at = (translate_z == translate_min) ? "min" : "max";

						translate(v = [translate_x, translate_y, translate_z])
						if (
							(apply_to == "all") ||
							(apply_to == "xmin" && x_at == "min") || (apply_to == "xmax" && x_at == "max") ||
							(apply_to == "ymin" && y_at == "min") || (apply_to == "ymax" && y_at == "max") ||
							(apply_to == "zmin" && z_at == "min") || (apply_to == "zmax" && z_at == "max")
						) {
							build_point("sphere");
						} else {
							rotate =
								(apply_to == "xmin" || apply_to == "xmax" || apply_to == "x") ? [0, 90, 0] : (
								(apply_to == "ymin" || apply_to == "ymax" || apply_to == "y") ? [90, 90, 0] :
								[0, 0, 0]
							);
							build_point("cylinder", rotate);
						}
					}
				}
			}
		}
	}
}

module knife_block() {
    difference() {
        if (round_edges < 1) {
            cube([scaled_width,scaled_length,scaled_height]);
        }
        else {
            roundedcube([scaled_width,scaled_length,scaled_height], radius = 0.2 * scaled_height, apply_to="zmax");
        }
        union() {
            translate([- buffer / 2, scaled_blade_length, scaled_height * 0.8]) {
                rotate([0, 90, 0]) {
                    cylinder(scaled_width + buffer, scaled_height/2, scaled_height/2, $fn = 64);
                }
            }
            translate([- buffer / 2, scaled_blade_length + 0.46 * scaled_height, scaled_height]) {
                rotate([115, 0, 0]) {
                    cube([scaled_width + buffer,scaled_length,scaled_height]);
                }
            }
            translate([- buffer / 2, scaled_blade_length, scaled_height * 0.3]) {
                rotate([10, 0, 0]) {
                    cube([scaled_width + buffer,scaled_length,scaled_height]);
                }
            }

            translate([- buffer / 2, scaled_blade_length, scaled_height / 2]) {
                rotate([2, 0, 0]) {
                    cube([scaled_width + buffer,scaled_length,scaled_height]);
                }
            }
            for (i = [1:blade_count]) {
                translate([(scaled_width * i) / (blade_count + 1) - scaled_blade_width/2, -buffer, scaled_height * 0.35]) {
                    cube([scaled_blade_width,scaled_blade_length + buffer, scaled_height]);
                }
            }
        }
    }
}

module tab(cylinder_radius, cylinder_height, length) {
    tab_height = cylinder_height / 2;
    translate([0, -length/2, 0]) {
        union() {
            cylinder(cylinder_height, cylinder_radius, cylinder_radius, $fn = 64);
            translate([0, length, 0]) {
                cylinder(cylinder_height, cylinder_radius, cylinder_radius, $fn = 64);
            }
            translate([-cylinder_radius / 2, 0, 0]) {
            cube([cylinder_radius, length, tab_height]);
            }
        }
    }
}

if (split_block <= 0) {
    knife_block();
} else {
    split_point = scaled_blade_length * 0.8;
    tab_length = scaled_length / 20;
    tab_radius = 0.25 * scaled_width / (blade_count + 1);
    translate([0, -split_point, 0]) {
        difference() {
            knife_block();
            translate([-buffer / 2, -buffer, -buffer / 2]) {
                cube([scaled_width + buffer, split_point + buffer, scaled_height + buffer]);
            }
            translate([scaled_width / (blade_count +1) / 2, split_point, 0]) {
                #tab(tab_radius, scaled_height * 0.3, tab_length);
            }
            translate([scaled_width - scaled_width / (blade_count +1) / 2, split_point, 0]) {
                #tab(tab_radius, scaled_height * 0.3, tab_length);
            }
        }
    }

    translate([scaled_width * 1.2, 0, 0]) {
         difference() {
            knife_block();
            translate([-buffer / 2, split_point, -buffer / 2]) {
                cube([scaled_width + buffer, scaled_length - split_point + buffer, scaled_height + buffer]);
            }
            translate([scaled_width / (blade_count +1) / 2, split_point, 0]) {
                #tab(tab_radius, scaled_height * 0.3, tab_length);
            }
            translate([scaled_width - scaled_width / (blade_count +1) / 2, split_point, 0]) {
                #tab(tab_radius, scaled_height * 0.3, tab_length);
            }
        }
    }

    translate([scaled_width * 2.4, tab_length, 0]) {
        tab(tab_radius * tab_scale, scaled_height * 0.3, tab_length);
    }

    translate([scaled_width * 2.4, 3 * (tab_radius + tab_length), 0]) {
        tab(tab_radius * tab_scale, scaled_height * 0.3, tab_length);
    }

}
```