[User]
Okay, I'm looking to design a customizable enclosure for various 3D printer controller boards, based on the Prusa i3 MK2 Rambo case design but generalized to fit more boards. I want it to be parametric so I can easily adjust it for different board sizes and mounting hole locations.

Here's what I need:

*   **Core Functionality:** The design will consist of a base and a hinged cover, similar to the original Prusa design. I only need the design for the cover, as I can use existing files to get the base or can request that separately. The cover needs to be designed to attach to the base via printed hinges.

*   **Parametric Board Dimensions:**
    *   `board_length`: The length of the controller board's PCB.
    *   `board_width`: The width of the controller board's PCB.
    *   `hole_offset`: The distance from the board's corner to the center of the mounting holes.
    *  `top_gap`:  Optional extra spacing between the top of the case and the PCB. Default should be zero.
     *  `hbp_offset`:  Optional offset for the heated bed power cable entry, to move it up or down.

*   **Derived Dimensions:**
    *   `case_length`: The length of the case (board length plus padding).
    *  `case_width`:  The width of the case (board width plus padding).
    *   `case_height`: The height of the case - I'd like to be able to vary this one as well.
    *   `cover_width`: The width of the cover (slightly narrower than the case).
    *   `cover_length`: The length of the cover (slightly shorter than the case).

*   **Key Design Features of the Cover:**
    *   Side panels with necessary cutouts for ventilation and the hinge.
    *   Reinforced corners and screw mounts.
    *   Rounded side (for cable routing)
    *   Hinge mechanism.
    *   Door closing mechanism with a screw.
    *   Cutouts for all necessary features.
    *   Ventilation slots/holes along the sides.
    *   Cutout for the door-closing screw.
    *   Side panel lightning slots.

*   **Considerations:**
    *   The cover is slightly narrower and shorter than the base.
    *   The hinge design is very important for proper fit and movement. I'm expecting that to be based on the original design, but the cutouts in the cover need to fit the hinges in my base.
    *   The ventilation holes need to be easily customizable, allowing for different widths of gaps between the ribs.

*   **Output:**
    *   I need a single OpenSCAD file for the parametric cover (and any necessary supporting files). I'm assuming you can use the standard OpenSCAD library for basic operations.

Can you generate this for me? I'd like to be able to use it to create covers for different boards, not just the RAMBo Mini.

[Assistant]
RAMBo-cover-doors.scad:
```
// PRUSA iteration3
// RAMBo doors
// GNU GPL v3
// Josef Průša <iam@josefprusa.cz> and contributors
// http://www.reprap.org/wiki/Prusa_Mendel
// http://prusamendel.org

// Length of controller PCB (mm)
board_length=103;

// Width of controller PCB
board_width=69;

// offset from the corner of the pcb to the mount hole centre
hole_offset=4;

// Padding at the top of the case - needed for some boards
top_gap=0;

// shift the HBP cable entry up (negative values) or down
hbp_offset = 0;

// // MKS SBASE
// board_length=146.5;
// hole_offset=4;
// board_width=95;
// top_gap=6;

// MKS BASE
//board_length=110.0;
//hole_offset=5;
//board_width=90;
//top_gap=6;

// RAMBO mini
// board_length=103;
// hole_offset=4;
// board_width=69;
// top_gap=0;

case_length=board_length+15.5+top_gap; // original 118.5
case_width=board_width+23; // original 92
case_height=35*1; // original 35. this isn't really adequately parameterized

// cover is narrower than the base by 4.5mm which is made up by the hinge tube
// cover is shorted than the base by 13mm because it doesn't have the extra flap bit
cover_width = case_width - 4.5; // originally 87.5
cover_length = case_length - 13; // originally 105.5

module body()
{
    // side panels
    cube( [ cover_length , cover_width , 1 ] );
    cube( [ cover_length , 2 , 20 ] );
    cube( [ 2 , cover_width , 20 ] );

    // corner reinforcement
    translate( [ cover_length-7.5 , 1 , 0 ] ) cube( [ 7.5 , 5 , 20 ] );
    translate( [ 0.5 , 0.5 , 0 ] ) cube( [ 5 , 6.5 , 20 ] );
    translate( [ 1 , 0 , 0 ] ) cube( [ 10 , cover_width , 6 ] );
    translate( [ cover_length-6 , 0 , 0 ] ) cube( [ 6 , cover_width , 7 ] );
    translate( [ 10 , 0 , 0 ] ) cube( [ 6 , 5 , 6 ] );

    // screw thread body
    translate( [ case_length/2 - 5.25 , 2 , 0 ] ) cube( [ 9.5 , 6 , 20 ] );

    // rounded side
    translate( [ 0 , cover_width , 4.5 ] ) rotate([0,90,0]) cylinder( h = cover_length, r = 4.5, $fn=30);

    // upper hinge reinforcement
    translate( [ 0.5 , cover_width-18.5 , -9 ] ) rotate([20,0,0]) cube( [ cover_length-79.5 , 20 , 10 ] );

    // door closing
    translate( [ 4 , 3.5 , 16.8 ] ) rotate([0,0,0]) cylinder( h = 3.2, r1 = 1.8, r2= 3.5, $fn=30);
    translate( [ cover_length-3.5 , 3.5 , 16.8 ] ) rotate([0,0,0]) cylinder( h = 3.2, r1 = 1.8, r2= 3.5, $fn=30);
}

module ventilation_holes()
    {
        width = (case_width-23-12) / 3;
        start = cover_length - 79;

      for ( i = [start: 5.5: cover_length-10] ){
    //   translate([46 + i,10.5,-1]) cube([3.65,19+50,1.2]);
    //   translate([46 + i,10.5,-1]) cube([3.65,19,10]);
    //   translate([46 + i,10.5+25,-1]) cube([3.65,19,10]);
    //   translate([46 + i,10.5+50,-1]) cube([3.65,19,10]);

        // fill width ribs underneath
        translate([i,10.5,-1]) cube([3.65,case_width-29,1.2]);

        // row 1
        translate([i,10.5,-1]) cube([3.65,width,10]);

        // middle row
        translate([+i,10.5+6 + width,-1]) cube([3.65,width,10]);

        // row 3
        translate([ i,10.5+12 + width*2,-1]) cube([3.65,width,10]);
    }
    // for ( i = [-6 : 0] ){
    //   translate([46 + (i*5.5),10.5,-1]) cube([3.65,19+50,1.2]);
    // }
    // for ( i = [-7 : -6] ){
    //   translate([46 + (i*5.5),20.5,-1]) cube([3.65,19+40,1.2]);
    // }
}

module cutouts()
{
    // door closing screw
    translate( [ case_length/2-0.75 , 4 , 5 ] ) cylinder( h = 17, r = 1.8, $fn=30);
    translate( [ case_length/2-0.75 , 4 , 18.5 ] ) cylinder( h = 2.6, r1 = 1.8, r2=2.2, $fn=30);
    translate( [ case_length/2-0.75 , 4 ,15.5] ){
        translate( [ 0 , 0 , 2.5 ] ) cube([5.7,3.8,1], center=true);
        translate( [ 0 , 0 , 3 ] ) cube([3.8,3.8,1], center=true);
    }

    ventilation_holes();

    // rounded side cutoff
    translate( [ cover_length-79 , cover_width , 4.5 ] ) rotate([0,90,0]) cylinder( h = 73, r = 3.5, $fn=30);
    translate([ cover_length-79 ,cover_width-7.5,5]) cube([73,19,10]);
    translate([ cover_length-79 ,cover_width-5,1]) cube([73,5,10]);

//////////////////////////

// these lot didn't get bottom referenced, and they should, but might need a bit of redesigning. need to understand the hinges better
    // upper hinge cut
    translate( [ -1, cover_width-27.5 , -10 ] ) cube( [ cover_length+2 , 30 , 10 ] );
    translate( [ cover_length-106.5 -5, cover_width , 0 ] ) cube( [ 22.5+5 , 10 , 10 ] );

    // upper hinge
    translate( [cover_length-106.5 -5, cover_width-7.5, 6] ) cube( [ 22.5+5, 10 , 10 ] );
    translate( [cover_length-106.5 -5, cover_width+2.2, 3] ) rotate([70,0,0]) cube( [ 22.5+5, 10 , 5 ] );
    // hinge hole in case end if the end is close
    translate( [ cover_length-84-21.5-1-5 , cover_width , 4.5 ] ) rotate([0,90,0]) cylinder( h = 22.5+5, r = 2.8, $fn=30);

    // hinge hole
    translate( [ cover_length-85 ,cover_width , 4.5 ] ) rotate([0,90,0]) cylinder( h = 120, r = 2.6, $fn=30);

////////////////////////////

    // door closing
    translate( [ 4 , 3.5 , 16.9 ] ) rotate([0,0,0]) cylinder( h = 3.2, r1 = 1.2, r2= 2.8, $fn=30);
    translate( [ cover_length-3.5 , 3.5 , 16.9 ] ) rotate([0,0,0]) cylinder( h = 3.2, r1 = 1.2, r2= 2.8, $fn=30);

    // M3 NUT
    translate( [case_length/2-3.6 , 0.5, 16] ) cube( [ 5.7, 10 , 2.2 ] );

    // side panel lightning slot
    translate( [2 , 10, 3] ) cube( [ 7, cover_width-22.5 , 5 ] );
    translate( [cover_length-4.5 , 10, 3] ) cube( [ 3, cover_width-17.5 , 5 ] );

    // corners - cut
    translate( [case_length/2-6.25 , 3, 1] ) rotate([0,0,70]) cube( [ 10, 10 , 50 ] );
    translate( [case_length/2+1.75 , 12, 1] ) rotate([0,0,-70]) cube( [ 10, 10 , 50 ] );

    translate( [16 , 2, 1] ) rotate([0,0,45]) cube( [ 5, 5 , 50 ] );

}

module RAMBo_doors()
{
difference()
{
    body();
    cutouts();
    // large corner cut
    translate( [0 , -20, -3] ) rotate([0,45,45]) cube( [ 30, 30 , 20 ] );
    }
}

RAMBo_doors();

```


[User]
Hey, I'm looking to create a customizable calendar-like object in OpenSCAD that's similar to something I made before, but I want it to be much more flexible. I want to be able to specify the number of columns and rows, the size of the toggles/holes, the thickness of the base, and the spacing between the toggles.

Basically, I want a base plate with a grid of holes, and I envision that these holes will have an insert piece that can be flipped or moved to indicate a "done" state. I'd like the insert piece to have a cylindrical shape that sits within a cutout of the hole, so the user can rotate the insert when they have completed something.

I'd like to be able to set the following parameters:

*   `columns`: The number of columns in the grid.
*   `rows`: The number of rows in the grid.
*   `hole_width`: The width of the hole cutout for the insert, measured along the row.
*   `hole_length`: The length of the hole cutout for the insert, measured along the column.
*   `thickness`: The thickness of the base plate.
*   `x_offset`: The spacing between holes, measured horizontally along the column.
*   `y_offset`: The spacing between holes, measured vertically along the row.
*  `insert_radius`: The radius of the cylindrical insert.

I'd like the code to create two modules: one for the base and one for the toggle (the insert that goes in the hole). I'd also like to have a main module that places the toggles on the base in a grid pattern. The main output should be the difference between the base and the toggles in their cut-out positions.

I'm not particularly concerned about complex aesthetics; the main thing is that it's functional and I can easily adjust the parameters.  I am not using any libraries right now, but if any of them would help with parametric design, please feel free to incorporate them, I'm open to using them, and I'm specifically interested in MCAD, BOSL, BOSL2, dotSCAD, NopSCADlib, and BOLTS. I'm also fine with the code being broken into multiple .scad files if that makes things more organized. It should be relatively straightforward.

[Assistant]
calendar.scad:
```
$fn = 50;

columns = 2;
rows = 7;

CHANGE_NO_VALUES_BELOW_THIS_POINT="CHANGE NO VALUES BELOW THIS POINT";

hole_width = 6;
hole_length = 18;
thickness = 10;

x_offset = 7;
y_offset = 6.833;

module base(){
    cube([(hole_length+x_offset)*columns+x_offset,(hole_width+y_offset)*rows+y_offset,thickness]);
}
module hole(){
    cube([hole_length,hole_width,thickness+2]);

    rotate(a=90, v=[0,1,0]) translate([-3.5,.5,0]) cylinder(r=3.162/2, h=hole_length);

    rotate(a=90, v=[0,1,0]) translate([-3.5,hole_width-.5,0]) cylinder(r=3.162/2, h=hole_length);
}
module holematrix(){
    for(col = [0:columns-1]){
        for(row = [0:rows-1]){
            translate([x_offset+(col*(hole_length+x_offset)),y_offset+(row*(hole_width+y_offset)),-1]){
                hole();
            }
        }
    }
}
difference(){
    base();
    holematrix();
}
```


[User]
I need a parametric OpenSCAD design for a cap that fits on the end of a pipe or can, like a cardboard tube. I'd like to be able to customize it for different pipe sizes, wall thicknesses, and whether or not it has a lid with holes. Also, it would be great if I could add dividers inside the cap.

Here's a breakdown of the parameters I'm thinking of:

*   **`tol`**: A tolerance value to add to hole diameters, let's start with 0.6 mm.
*   **`wt`**: The wall thickness of the cap itself; a default of 1.0 mm should be good.
*   **`d1`**: The outer diameter of the pipe/can, for example 85.5 mm.
*   **`d2`**: The inner diameter of the pipe/can, for example 77.5 mm.
*   **`l1`**: The outer length/height of the cap; 6.0 mm should be fine to start.
*   **`l2`**: The inner length/height of the cap; 6.0 mm, same as `l1` for now.
*   **`makeCap`**: A boolean (or perhaps a string like "yes" or "no") to determine whether to include a top on the cap, defaulting to "no".
*   **`makeHoles`**: Another boolean/string, only relevant if `makeCap` is "yes", to include holes in the top of the cap, defaults to "no".
*   **`dh`**: The height of internal dividers (if present), zero for no dividers; let's start with 49.1 mm.
*   **`hd`**: The diameter of the holes, if present, say 4.0 mm initially.
*   **`e`**: A small difference value between holes and solids to prevent glitches; 0.02 mm is a good start.
*   **`$fn`**:  A smoothness parameter (number of fragments for circles); 128 is good for a fine resolution.

The cap itself should be a hollow cylinder that fits snugly over the end of a pipe, with adjustable wall thickness. If `makeCap` is "yes," the hollow cylinder will have a top with or without holes, specified by `makeHoles`. If `dh` is greater than zero, there should be intersecting internal dividers. I'd like the holes to be arranged in a circular pattern but to still be functional for holding things (e.g., pencils), not just a basic grid.

I'm not sure if this will need multiple .scad files, but I'd like everything to be parametric. I’m not using any libraries and don't expect you to use any either, just vanilla OpenSCAD.

[Assistant]
pipeCanCap.scad:
```
// all measurements are in millimeters (mm)

// tolerance added to every hole diameter (mm)
tol = 0.6;

// wall thickness (mm)
wt 		= 1.0;

// pipe/can outer diameter (mm)
d1 = 85.5;
d1t = d1 + tol;

// pipe/can inner diameter (mm)
d2 = 77.5;
d2t = d2 - tol;

// outer length (mm)
l1 = 6.0;

// inner length (mm)
l2 = 6.0;

// make cap?
makeCap = "no"; // [yes,no]

// make holes?
makeHoles = "no"; // [yes,no]

// dividers height (zero -> no dividers)
dh = 49.1;

// holes diameter (mm)
hd = 4.0; // [4:12]

// difference in holes and solids to prevent (visual) glitches (mm)
e = 0.02*1;

// smoothness
$fn = 128;

module outerSolid()
{
	cylinder(d=d1t+2*wt,h=l1);
}

module outerHole()
{
	translate([0,0,wt]) cylinder(d=d1t,h=l1+2*e);
}

module innerSolid()
{
	cylinder(d=d2t,h=l1);
}

module innerHole()
{
	translate([0,0,-e			]) cylinder(d=d2t-2*wt,h=l1+2*e);
}

module holes()
{
	pi = 3.14159*1;
	m = floor(0.7*d2t/(1.1*hd+3));
	s = 0.53*d2t/m;
	for(i=[0:m-1])
	{
		d2 = i*s;
		k = 1+floor(2*pi * d2 / (1.2*hd+2));
		s2 = 360/k;
		for(j=[0:k])
		{
			rotate([0,0,i*s2/2+j*s2])
				translate([d2,0,-e])
					cylinder(d=hd,h=wt+2*e,$fn=3+5*hd);
		}
	}
}

union()
{
	difference()
	{
		union()
		{
			innerSolid();
			difference()
			{
				outerSolid();
				outerHole();
			}
		}
		innerHole();
	}
	if(makeCap=="yes")
	{
		difference()
		{

			cylinder(d=d2t-2*wt+2*e,h=wt);
			if(makeHoles=="yes") holes();
		}
	}
	if(dh>0.01)
	{
		translate([0,0,dh/2])
		{
			cube([d2t,wt,dh],center=true);
			cube([wt,d2t,dh],center=true);
		}
	}
}
```


[User]
I need a parametric OpenSCAD design for wire clips, similar to the ones described in the `wireclip_custom_v1_03.scad` file I'm providing. These clips should be able to secure either flat speaker wire or round coax cable to a wall or baseboard.

Here are the key features and parameters I need:

*   **Cable Type:**  The design needs to handle both flat and round cables, selectable by a `cable_type` parameter (likely an enumerated string, values like "FLAT" and "ROUNDED").  For flat cable, the channel should be rectangular. For round cable, the channel needs to be a half-cylinder to hold the rounded cable.
*   **Nail Count:** I need an option for single or dual nails.  A `nails` parameter (likely an enumerated string) should control this, with options like "SINGLE" and "DUAL". For dual nails, the clip should be symmetrical along its lengthwise axis.
*   **Clip Strength:** A `clip_strength` parameter (likely an integer) should adjust the overall thickness/robustness of the clip. Something like 1 for lightweight, 2 for standard, 3 for beefy, and 4 for heavy-duty, controlling the thickness of the clip's base, top, and sides.
*   **Nail Hole Size:** The diameter of the nail hole needs to be adjustable with a `nail_hole_width` parameter, probably controlling the hole's diameter. Suggested values are provided like 1.0mm, 2.2mm, 3.0mm, and 4.0mm.
*   **Wire Channel Dimensions:**  I need `wire_width` and `wire_height` parameters to precisely define the dimensions of the wire channel.
*   **Clip Width:** I'll also need a `clip_width` parameter to specify the overall width of the clip itself.

The design should construct the main body of the clip, subtract a void for the wire channel, and include a hole for the nail(s). For the dual-nail option, two of these base units should be mirrored and joined.

I'm looking for a clean, well-structured design using modules and parameters. I'd expect that your generated file will include the following modules: `clip_block`, `wire_channel_square`, `wire_channel_rounded`, `nail_hole`, `clip_composite`, and `clip`, or similar modules with descriptive names.

I am *not* expecting you to use existing libraries like MCAD, BOSL, BOSL2, dotSCAD, NopSCADlib, or BOLTS. Instead, I'd like you to implement all of these structures directly in OpenSCAD primitives.

[Assistant]
wireclip_custom_v1_03.scad:
```
// Flat cable (Speaker wire) & Round cable (Coax) clip v1.03 by nexustar
//
// Now you can print exactly the quantity of wire clips you need, tailored for a snug fit to the wire you are securing,
// using appropriate colors to blend in with either the wall or wire.
// I suggest printing in ABS or Nylon for strength, but for light/normal use, PLA seems to work well.
// Take care removing small clips from the bed, the non-nail side tag can easily snap.
//
// Version 1.00 - 2017-06-03
//   * Speaker wire clip at 7.4mm
//
// Version 1.01 - 2016-06-05
//   * Preparing for thingiverse, clean up modules
//   * Added cusomizable capability for thingiverse: Clip width, cable width, cable height, hole size, strength.
//
// Version 1.02 - 2016-06-06
//   * Added coax vs flat option
//
// Version 1.03 - 2016-06-08
//   * Re-engineered to be centrally aligned on y-axis to use mirror to support dual-nail clips

// --- Begin Thingiverse Customizer Section ----

cable_type = "FLAT"; // [FLAT:Flat Speaker Cable,ROUNDED:Rounded Coax Cable]

nails = "SINLE"; // [SINGLE:One Nail,DUAL:Two Nails]

clip_strength = 2; // [1:Lightweight,2:Standard,3:Beefy,4:Heavy Duty]

nail_hole_width = 2.2; // [1.0:Thin Guide 1mm,2.2:Standard 2.2mm,3.0:Large 3mm, 4.0:Extra Large 4mm]

// (width of wire channel, in mm)
wire_width = 7.4; // [2:0.2:30]

// (height of wire channel, in mm)
wire_height = 3.8; // [2:0.2:30]

// (width of the clip, in mm)
clip_width = 5; // [3:30]

// --- End Customizer Section ----

clip_length = wire_width + clip_strength + 1.7;
clip_height = wire_height + clip_strength;
x_center_offset = 0 - (clip_length / 2) + 0.35;

module clip_block(){
    translate([x_center_offset, 0, 0]) cube([clip_length, clip_width, clip_height]);

    translate([clip_length + x_center_offset, (clip_width / 2),0])
      cylinder(h=clip_height, r=(clip_width / 2), $fn=30);
}

module wire_channel_square(){
    translate([(clip_strength * 0.75) + x_center_offset , -0.5, clip_strength])
      cube([wire_width, (clip_width + 1),(wire_height + 0.5)]);
}

module wire_channel_rounded(){
    translate([(clip_strength * 0.75) + x_center_offset, -0.5, clip_strength + (wire_width / 2)])
      cube([wire_width, (clip_width + 1),(wire_height + 0.5)]);

    translate([(clip_strength * 0.75) + x_center_offset, -0.5, clip_strength + (wire_width / 2)])
      translate([(wire_width / 2), clip_width + 1,0])
      rotate([90,0,0])
      cylinder(h=clip_width + 2, r=(wire_width / 2), $fn=30);
}

module nail_hole(){
    translate([clip_length + x_center_offset + (clip_width / (PI * 2)) + (nail_hole_width / (PI * 2)) - 1, (clip_width / 2), -0.5])
      cylinder(h=(clip_height + 1), r=(nail_hole_width / 2), $fn=30);
}

module clip_composite(){
    color([0.7,0.7,0.7])
    difference(){
        clip_block();
        if (cable_type=="FLAT") wire_channel_square();
        if (cable_type=="ROUNDED") wire_channel_rounded();
        nail_hole();
    }
}

module boolean_chopped_clip_composite(){
    difference(){
        clip_composite();

        translate([-clip_length - 0.5, -0.5, -0.5])
          cube([clip_length, clip_width + 1, clip_height + 1]);
    }
}

module clip(){
    if (nails=="DUAL")
    {
        union(){
          boolean_chopped_clip_composite();

          mirror([1,0,0])
            boolean_chopped_clip_composite();
        }
    }
    else // "SINGLE"
    {
        clip_composite();
    }
}

// Build part
clip();

```


[User]
I need to create a mount for a BLTouch sensor on the rear linear bearing of my 3D printer, specifically an Anet A8. I've seen a design that does this but it's not parametric enough for my needs. I need to be able to adjust several dimensions to fit my specific setup.

Here's what I'm thinking. The mount should consist of a backplate that attaches to the linear bearing housing and a sensor mount that holds the BLTouch.

**Backplate Parameters:**

*   **`mount_width`**:  The width of the backplate. This should match the width of the linear bearing housing. The default on an Anet A8 is 30mm, but I need to be able to adjust this.
*   **`mount_height`**: The height of the backplate. The default is 12.7mm, but again, I need this to be adjustable.
*   **`mount_thickness`**:  The thickness of the backplate. Default is 4.5mm but I need to change this too.
*  **`mount_hole_vert_offset`**: How far the mounting holes are from the top edge of the backplate.  The default for an Anet A8 is 3.7mm.
*   **`mount_hole_dist`**:  The horizontal distance between the linear bearing mounting holes. On the A8 this is 18mm.
*   **`dia_screw_hole`**: The diameter of the screw holes that attach the mount to the linear bearing housing. It should be smaller than the screw used, ideally 2.8mm.
*  **`dia_screw_hole2`**: The diameter of the end of the dowel. Should be smaller than `dia_screw_hole`, maybe 2mm.
*   **`dia_mounting_hole`**: The diameter of the holes on the linear bearing itself. For the A8 it's 3.4mm.
*   **`dowel_length`**: The length of the dowels that protrude into the linear bearing holes. Default is 10mm.
*   **`add_bevels`**: An option to add a bevel to the dowels for easier insertion. This should be a boolean (0 or 1).
*   **`dia_screw_head`**: The diameter of the screw heads. Default should be 5.5mm.

**Sensor Mount Parameters:**

*   **`bl_height_with_offset`**: The overall height of the BLTouch including the 8.3mm offset from the probe tip to the mounting holes. I'd like this to be a user-defined value. The default should be 44.6mm.
*   **`measured_height`**: The distance from the top of the linear bearing mount to the bed when the nozzle is touching the bed. This is used to calculate the correct height for the sensor.
*   **`sensor_offset_mount`**: An offset of the sensor from the linear bearing in the Y-direction. This is to give clearance on the newer A8 models, the default is 16mm but I want to adjust this.
*   **`sensor_height_wall`**: The height of the wall holding the sensor.  Default 3mm
*   **`sensor_diameter`**: Distance between screws on the sensor (should be 18)
*  **`sensor_thickness_wall`**: Thickness of the mounting wall, should be 2mm

**General Parameters:**

*   **`extra_radius`**:  An extra radius for screw holes to avoid tight fits. Default 0.05mm.
*   **`mount_type`**: option between thick and thin mount. Default is thick mount.
*  **`$fn`**:  For curvature. Default 50.

**Functionality:**

*   The design needs to calculate the sensor mount height (`sensor_mount_height`) based on  `mount_height_holes`, `measured_height`, and `bl_height_with_offset`. The calculation should be `(mount_height_holes + measured_height) - bl_height_with_offset + 1`. `mount_height_holes` is `mount_height - mount_hole_vert_offset`.
*   The backplate should have dowels that fit into the linear bearing holes. The dowels should be slightly larger than the screw holes (`dia_mounting_hole`).
*   The mounting holes should have recesses for the screw heads and dowels.
*   The sensor mount needs to have the correct height for the sensor to sit correctly. The sensor mount should have holes that line up with the BLTouch screw holes, with screw head recesses.
* I'd like the `cos_line` and `cos_line_i` functions from the provided code to be used to provide a smooth curve in the sensor mount.
*   Use `mirror2` module to make code more readable

I'm requesting that you provide the OpenSCAD code for this design with all these parameters adjustable and make sure the dowel/hole dimensions fit as described. It's important to get the sensor height correct, based on `measured_height`, so please make sure the calculations are correct. I would prefer to use standard OpenSCAD functionality, but would be happy with suggestions to use external libraries if they greatly simplify the code.

[Assistant]
Bl_Touch_Rear_Mount_v1.1.scad:
```
eps = 0.01*1;
$fn = 50*1;

// Increase this if your slicer or printer make holes too tight (default 0.1)
extra_radius = 0.05*1;

// Major diameter of metric 3mm thread
m3_major = 2.85*1;
m3_radius = m3_major / 2 + extra_radius;
m3_wide_radius = m3_major / 2 + extra_radius + 0.2;

/* [Main Parameters] */

//type of support
mount_type=0; //0:thick,1:thin

//Length of the touch sensor used including 8.3 offset (36.30 + 8.3)
bl_height_with_offset = 44.6;

//Measured height of top mount screw mid to bed with nozzle all the way down
measured_height = 60;

// Give an offset of the sensor to the linear bearing in printers y-direction (default: 7).  This is used to give clearance to the sensor when it reaches the extreme end or it will bind on new Anet A8's
sensor_offset_mount = 16; //[3:0.1:25]

/* [General Mounting Options] */

// Width of back plate - should match the width of the linear bearing housing (for stock Anet A8: 30)
mount_width = 30;  //[20:0.1:60]

// Height of back plate (default: 12.7)

mount_height = 8; //[10:0.1:50]

// Thickness of back plate (default: 4.5)
mount_thickness = 4.5; //[2:0.1:10]

//  Height of the clip holding the sensor (default: 5)
sensor_height_wall = 3;  //[2:0.1:12]

// Diameter of screw head(s) (default: 5.5)
dia_screw_head = 5.5; //[4:0.1:7]

// How far should the mount holes be away from the top bezel - should match the geometry of linear bearing housing (for stock Anet A8: 3.7)
mount_hole_vert_offset = 3.7; //[2.5:0.1:5]

//adjust holes location
mount_height_holes = mount_height - mount_hole_vert_offset;

// Horizontal distance of linear bearing mounting holes in mm (default: 18)
mount_hole_dist = 18; //[10:0.1:30]

// Diameter of screw hole for mount to linear bearing - should be smaller than screw for effective dowel and MUST BE SMALLER by an amount of around twice the nozzle width than dia mounting hole! (recommended: 2.8)
dia_screw_hole = 2.8; //[2:0.1:4]
// Nonconical: 2.6

// Diameter of screw hole at the end of the dowel - conical for best dowel effect, i.e. smaller than value above (recommended: 2)
dia_screw_hole2 = 2;  //[1:0.1:4]

// Diameter of the hole of linear bearing - must be larger then diameter of screw hole (default: 3.4)
dia_mounting_hole = 3.4; //[1:0.1:5]

// Length of dowels (default: 10)
dowel_length = 10; //[6:0.1:20]

// Add bevel to dowels for easier insertion (reduces effective dowel length slightly)
add_bevels = 1;  // [0:No, 1:Yes]

//distance between screws on sensor
sensor_diameter = 18;

//thickness of mounting wall default:2
sensor_thickness_wall = 2;
//calculate needed mount height from given measurements
//sensor_mount_height = ((mount_height_holes + measured_height) - (bl_height + bl_offset_height));

sensor_mount_height=calc_mount_height();

//echo(sensor_mount_height,mount_height,bl_offset_height);
rotate([180,0,180])
difference(){
    union(){
        backwall(mount_width, mount_height, mount_thickness);

            sensor_bltouch(sensor_diameter, sensor_thickness_wall,sensor_height_wall, sensor_offset_mount,sensor_mount_height);

    }

    // Ensure screws are accessible
    mirror2([1,0,0])
            translate([mount_hole_dist/2,-eps,mount_height_holes])
                rotate([-90,0,0])
                    cylinder(r1=dia_screw_head/2, r2=0, h = 20);
}

module backwall(w, h, th){
    thickness_slices = 1;
    angle_bevel = 35;

    difference(){
        union(){
            translate([0, -th/2, h/2])
                cube([w, th, h], center=true);

            //Cylinders for dowels
             mirror2([1,0,0])
                translate([mount_hole_dist/2,-th+eps,mount_height_holes])
                    rotate([90,0,0])
                        cylinder(r=dia_mounting_hole/2, h = dowel_length);

            //Dowel support
             mirror2([1,0,0])
                translate([mount_hole_dist/2,-th+eps,mount_height_holes])
                    rotate([90,0,0])
                        cylinder(r1=dia_mounting_hole/2*1.3, r2=dia_mounting_hole/2, h = 0.5);

        }

        // Holes for screws
        mirror2([1,0,0])
            translate([mount_hole_dist/2,eps,mount_height_holes])
                rotate([90,0,0])
                    cylinder(r1=dia_screw_hole/2,r2=dia_screw_hole2/2, h = th+dowel_length+3*eps);

        // Holes for screwheads
        mirror2([1,0,0])
            translate([mount_hole_dist/2,eps,mount_height_holes])
                rotate([90,0,0])
                    cylinder(r=dia_screw_head/2, h = 1);

        // Slices for dowels
        mirror2([1,0,0])
            translate([mount_hole_dist/2-thickness_slices/2,-th-0.5-dowel_length,mount_height_holes-dia_mounting_hole/2])
                cube([thickness_slices,dowel_length+3*eps,dia_mounting_hole+2*eps]);

        // Bevel
        if(add_bevels)
             mirror2([1,0,0])
                translate([mount_hole_dist/2-dia_mounting_hole/2,-th-dowel_length-dia_mounting_hole,mount_height_holes-dia_mounting_hole/2+(sin(angle_bevel)*dia_mounting_hole)])
                    rotate([-angle_bevel,0,0])
                        cube([dia_mounting_hole+2*eps,dia_mounting_hole,dia_mounting_hole*2]);
    }
}

module sensor_bltouch(dia, th_wall, h_wall, y_offset,z_offset) {

    points= concat([[-z_offset,y_offset-th_wall]],cos_line_i(-z_offset+h_wall,0,y_offset-th_wall,1,30), [[-z_offset,1]]);

     difference(){
        union(){
            difference(){
                union(){
                    //lower sensor mount
                    translate([0,0,z_offset-h_wall])
                  hull(){
                       translate([dia/2,y_offset+th_wall,0]) cylinder(r=5, h = h_wall);

                      translate([-dia/2,y_offset+th_wall,0])
                        cylinder(r=5, h = h_wall);

                       }

                       if(mount_type==0) {
                       //extra 1mm padding between curve and mount for support
               translate([0,0,0])    mirror2([1,0,0])   cube([6,1,z_offset],center=false);

                        //middle throat section with smoothed curve

                        mirror2() rotate([0,90,0])   linear_extrude(height = 6)
                            polygon(points);

                       } else {

                         translate([0,0,0])    mirror2([1,0,0])   cube([6,h_wall,z_offset],center=false);

                         translate([0,0,z_offset-h_wall])    mirror2([1,0,0])   cube([6,y_offset-th_wall,h_wall],center=false);

                       }
                     }

                //middle hole
            translate([0,y_offset+th_wall,0])
                       scale([1,1]) cylinder(r=3, h = z_offset+1);

                  // Holes for screws in sensor mount
        mirror2([1,0,0])
            translate([18/2,y_offset+th_wall,z_offset-h_wall])
                //rotate([0,0,0])
                    cylinder(r=3.3/2, h = h_wall+3*eps);

        // Holes for screwheads
        mirror2([1,0,0])
            translate([18/2,y_offset+th_wall,z_offset-h_wall])
               // rotate([90,0,0])
                    cylinder(r=dia_screw_head/2, h = 1);

            }

        }

 }

}
function cos_line(x_min,x_max,y_min,y_max,fn=180)=
    [for(i=[180:180/fn:360])
    [x_min+((i-180)/180)*(x_max-x_min),y_min+(cos(i)+1)/2*(y_max-y_min)]
];
function cos_line_i(x_min,x_max,y_min,y_max,fn=180)=
    [for(i=[180:180/fn:360])
    [x_min+(cos(i)+1)/2*(x_max-x_min),y_min+((i-180)/180)*(y_max-y_min)]
];

function calc_mount_height()=

   (mount_height_holes + measured_height) - (bl_height_with_offset) +1 ;

module mirror2(v) {
    children();
    mirror(v) children();
}

```


[User]
Hey, I'm looking for a customizable lamp shade design that I can 3D print, and I found this really cool one on Thingiverse that I want to recreate, but I need it to be parametric so I can adjust it easily.

The original design has a few shapes: simple (like a cone or cylinder), sphere, flower, and a dodecahedron. For the simple shape, I'd like to be able to control the top and base diameters as well as the height. For the sphere, I need to be able to control how much of the top and bottom are cut off. The flower shape has a base diameter, a head diameter, height, and a number of leaves. The dodecahedron should let me control how much of the top is cut off.

All shapes should have a shell thickness, a base diameter where it attaches to the bulb holder, and a bulb bracket hole with a customizable diameter and support. I also need to be able to set the resolution of round shapes, which will determine the number of edges on the simple shape and the number of segments in the circles for other round shapes.

Can you create an OpenSCAD file that lets me adjust all these parameters? I'd love to be able to experiment with different designs by changing the variables. I'm not using any external libraries, so it can all just be in a single file.

[Assistant]
customizable_lamp_shade.scad:
```
/*
 * Customizable Lamp Shade - https://www.thingiverse.com/thing:2372190
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-06-08
 * version v1.0
 *
 * This work is licensed under the Creative Commons - Attribution - Non-Commercial license.
 * https://creativecommons.org/licenses/by-nc/3.0/
*/

 // Parameter Section//
//------------------//

// choose the shape of the lamp shade
lamp_shape = "dodecahedron"; //[simple,sphere,flower,dodecahedron]

// [Simple, sphere and flower shape] Resolution of round shapes. You can also use this value as the number of edges of the simple shade. If you want a cube or a pyramide, set the value of 4. If you want a cylinder or a cone, set the value of 100-255. Create a star shape with the flower shape with resolution of 3-5. Minimum value for a sphere shape is 7. You can use a low resolution (e.g. 16-32) to create a low polygon style. You can create some interesting shapes with this parameter. Just try some different values!
resolution = 16; //[3:255]

// Thinner for more translucency, thicker for more stable lamp shade. Default: 1.0
shell_thickness_in_millimeter = 1.0;

// [All lamp shapes] Set the diameter of the base of the lamp shade. The base is the position, where the bulb fitting is located. This parameter is used for all lamp shapes.
lamp_shade_base_diameter_in_millimeter = 130.0; //[1:300]

// [Simple and flower shape] Set the diameter of the head of the lamp shade. The head is the top position of the lamp shade. If this value is higher or lower than the base diameter, you get a cone or pyramide. Lower value can be used for desk lamp, higher value can be used for ceiling lamp. This parameter is used for simple and flower shape.
lamp_shade_head_diameter_in_millimeter = 160.0; //[1:300]

// [Simple and flower shape] Set the height of the lamp shade. This parameter is used for simple and flower shape
lamp_shade_height_in_millimeter = 80.0; //[1:300]

// [Sphere and dodecahedron shape] Set the cut height of the head of the shape. 0 means a closed top. It is like sclicing the top of an apple with a knife. This parameter is used for sphere and dodecahedron shape.
head_cut_height_in_millimeter = 20.0; //[0:200]

// [Sphere shape only] Set the cut height from the base of the shape. It is like sclicing the bottom of an apple with a knife. This parameter is used for sphere and dodecahedron shape.
base_cut_height_in_millimeter = 30.0;  //[0:200]

// [Flower shape only] This parameter only is used for flower shape
number_of_flower_leaves = 8; //[2:64]

// Set the diameter of the bulb bracket you want to use. Add a little extra for tolerance like 2mm if you are using a outside threaded bracket + nut/ring. If you are using a threadless bracket, it depends on the material. If it is a silicone one, you can use a little smaller hole. If it is non elastic plastic, this could be a challenge. If it is to loose, you can try to glue the gap between bracket and the lamp shade. Or do some test prints of the first 5-10 layers, before printing the whole lamp shade. Use 0, if you don't need a hole.
bulb_bracket_diameter_in_millimeter = 42.0;

// This is the additional support height for the bulb bracket. Depending on the bulb bracket you are using, this extra makes the hole more stable.
bulb_bracket_support_height_in_millimeter = 2.0;

// This is the additional support width for the bulb bracket. Depending on the bulb bracket you are using, this extra makes the hole more stable.
bulb_bracket_support_width_in_millimeter = 3.0;

/* [Hidden] */
shape_height = lamp_shade_height_in_millimeter;
base_cut = base_cut_height_in_millimeter;
head_cut = head_cut_height_in_millimeter;
shell = shell_thickness_in_millimeter;
flower_leaves = number_of_flower_leaves;
bulb_bracket_d = bulb_bracket_diameter_in_millimeter;
bulb_bracket_support_w = bulb_bracket_support_width_in_millimeter;
bulb_bracket_support_h = bulb_bracket_support_height_in_millimeter;
shape_base_outside = lamp_shade_base_diameter_in_millimeter;
shape_head_outside = lamp_shade_head_diameter_in_millimeter;

shape_base_inside = shape_base_outside - shell * 2;
shape_head_inside = shape_head_outside - shell * 2;
$fn=resolution;

 // Program Section//
//-----------------//

color("DeepSkyBlue") rotate([0,0,45]) {
	difference() {
		union() {
			// Shape part
			if(lamp_shape == "simple") simple_shape();
			if(lamp_shape == "sphere") sphere_shape();
			if(lamp_shape == "flower") flower_shape();
			if(lamp_shape == "dodecahedron") dodecahedron_shape();

			// Bulb bracket support
			cylinder(d = bulb_bracket_d + bulb_bracket_support_w * 2, h = bulb_bracket_support_h + shell, $fn=100);
		}

		// Bottom bulb bracket hole
		translate([0,0,- 0.1]) {
			cylinder(d = bulb_bracket_d, h = shell + bulb_bracket_support_h + 0.2, $fn=100);
		}

	}
}

 // Module Section//
//---------------//

module simple_shape() {
	difference() {
		cylinder(d1 = shape_base_outside, d2 = shape_head_outside, h = shape_height);
		translate([0, 0, shell]) {
			cylinder(d1 = shape_base_inside, d2 = shape_head_inside, h = shape_height);
		}
	}
}

module sphere_shape() {
	translate([0, 0, shape_base_outside / 2 - base_cut]) {
		difference() {
			base_cut_sphere(shape_base_outside, base_cut);
			translate([0, 0, shell / 2]) {
				base_cut_sphere(shape_base_inside, base_cut);
			}
			// Head Cut
			translate([0, 0, shape_base_outside / 2 - head_cut]) {
				cylinder(d = shape_base_outside * 2, h = head_cut);
			}
		}
	}
}

module flower_shape() {
	difference() {
		flower(shape_base_outside, shape_head_outside);
		translate([0, 0, shell]) {
			flower(shape_base_inside, shape_head_inside);
		}
	}
}

module dodecahedron_shape() {
	translate([0, 0, shape_base_outside / 2]) {
		difference() {
	            dodecahedron(shape_base_outside);
	            dodecahedron(shape_base_inside);
	           	// Head Cut
				translate([0, 0, shape_base_outside / 2 - head_cut]) {
					cylinder(d = shape_base_outside * 2, h = head_cut + 0.1);
			}
	    }
	}
}

module base_cut_sphere(size, base) {
	difference() {
		sphere(d = size);
		// Base Cut
		translate([0, 0, - size / 2]) {
			cylinder(d = size * 2, h = base);
		}
	}
}

module dodecahedron(size) {
	scale([size, size, size]) {
        intersection() {
            cube([2, 2, 1], center = true);
            intersection_for(i = [0:4]) {
                rotate([0, 0, 72 * i]) {
                	rotate([116.565, 0, 0]) {
                        cube([2, 2, 1], center = true);
                    }
                }
            }
        }
    }
}

module flower(size1, size2) {
	leaf_diameter1 = size1 * 3 / flower_leaves;
	leaf_diameter2 = size2 * 3 / flower_leaves;

	difference() {
		union() {
			cylinder(d1 = size1 - leaf_diameter1,, d2 = size2 - leaf_diameter2, h = shape_height, $fn=100);
			for(leaf = [0:flower_leaves]) {
				rotate([0, 0, 360 / flower_leaves * leaf]) {
					hull() {
						translate([(size1 - leaf_diameter1) / 2, 0, 0]) {
							cylinder(d = leaf_diameter1, h = 0.1);
						}
						translate([(size2 - leaf_diameter2) / 2, 0, shape_height]) {
							cylinder(d = leaf_diameter2, h = 0.1);
						}
					}
				}
			}
		}
		translate([0, 0, shape_height]) {
			cylinder(d = size2 + 1, h = 0.2);
		}
	}
}

```


[User]
I'd like to create a customizable shade, similar to the "U-TWIST-O-SHADE" design I saw online. It's got a neat twisty look, and I'd like to be able to tweak things like the overall height, diameter, and the amount of twist. I'm thinking of using it as a lamp shade, but maybe also as a decorative vase or even a bottle insulator if it works out.

Here's what I have in mind:

*   **Overall Shape:** The design should have a generally cylindrical base that gets "twisted" as it goes up. This twisting is achieved by having a number of extensions around the cylinder that are twisted as they're extruded vertically.
*   **Customizable Dimensions:**
    *   **Inside Diameter:**  I need to be able to set the base inner diameter of the cylinder.
    *   **Overall Height:** I'd like control over the total height, perhaps broken into sections, with adjustable height for each section (bottom, lower middle, upper middle, top).
    *   **Extension Number:** I need to be able to set how many of those twisted extensions there are around the cylinder.
    *   **Extension Angle:**  I should be able to adjust the angle of each of those extensions. The larger the angle, the more visible the twist.
    *    **Extension Offset:** I also want to control how far the extensions stick out from the main cylinder.

*   **Twist:**
    *   **Sectional Twist:** Each height section (bottom, lower middle, upper middle, top) should have its own adjustable twist angle.

*   **Optional Rings:**
    *   **Top and Bottom Rings:** I'd like the option to add rings at the bottom and top of the shade. These would effectively extend the diameter of the base and top and would make the shade look a little more finished. They would extend out from the main diameter, as well as extend up vertically.
    *   **Ring Cutouts:** I want to specify a shift parameter for both the top and bottom rings. This will enable me to use the cut-out method used in the original design with the rings.
*   **Adapter Hole:**
    *   **Base Hole:** I need to be able to define an adapter hole in the center of the base, for mounting the shade onto something. I should be able to control its diameter, and also to set this to 0 if I don't want it.
*   **Ventilation Holes**
    *   **Vent Holes:** I want to add ventilation holes around the base, spaced evenly around the base circle. I need to be able to control the diameter of these holes, as well as the number of them. I should also be able to set both the number of holes and the diameter to zero if I don't want them.
*   **Crossed pattern:**
    *   **Mirror Option:** I would like to be able to mirror the whole pattern. I don't know what this would look like, but the original design has it so I'd like to have it too.
*   **Slices:**
    *   **Slices:** I want to be able to control the amount of slices used to create the twist. This parameter, in the original design, also sets the smoothness of the twist.

*   **Printer Settings:**
    *   **Layer Thickness:** I'd like to be able to specify the layer height for the printer so that cutouts can be adjusted.
    *  **Nozzle Thickness:** I'd also like to specify the nozzle thickness for cutouts.

It seems like a good way to create the twists would be to use `linear_extrude` with the `twist` and `slices` parameters, combined with `hull` operations. I'd prefer a clean design with well-commented code.

Could you provide me with an OpenSCAD file (or files) to accomplish this?  I don't need any libraries.

[Assistant]
U-TWIST-O-SHADE.scad:
```
/*
 *  GLOBALS *
*/

//      2017 Daniel Spielmann,copyright
//      www.thingiverse.com/thing:2373657

// preview[view:south, tilt:bottom diagonal]

/* [Features] */
//crossed or not, mirror the pattern
crossed = "no";	//	[yes,no]
//Lower Ring
ring_low = "yes";	//	[yes,no]
//Upper Ring
ring_up = "yes";	//	[yes,no]
//Bottom cut shift, 0 for none, used only when ring
bottomshift = 1;
//Top cut shift, 0 for none, used only when ring
topshift =1;

//Inside Diameter
diameter = 60;
//Adapterholediameter, 0 for none
adaptersize = 10;
//Ventingholesdiameter, 0 for none
venthole = 4;
//Number of Ventholes
num_ventholes = 3;
//Bottom Height
bottomheight = 10;
//Lower Middle Height
lowmiddleheight = 15;
//Upper Middle Height
upmiddleheight = 15;
//Top Height
topheight = 10;

/* [Extensions] */
//Number of extensions
num_extensions = 40;
//Angle of Extensions, the more the thicker the extensions
angle_extension = 6;//[1:30]
//Offset of Extensions
offset_extension = 4;

/* [Twist] */
//Bottom Twist Angle
bottomtwist = 15;//[-80:80]
//Lower Middle Twist Angle
lowmiddletwist = -40;//[-80:80]
//Upper Middle Twist Angle
upmiddletwist = 40;//[-80:80]
//Top Twist Angle
toptwist = -15;//[-80:80]
//Middle slices
slices = 5;//[0:200]

/* [Printersettings] */
//Layer, Height of Layer, used for cutouts
layer = 0.2;
//Nozzle or Wallthicknes
nozzle = 0.4;

/* [Hidden] */

adapter_radius = (adaptersize/2);
extensionangle = (angle_extension/2);
insideradius = (diameter/2);
angle_number_extension = 360/num_extensions;
bottomringheight = offset_extension;
vent_dist = (((diameter/2)-(adaptersize/2))/2);
vent_ang = 360/num_ventholes;

 difference(){
    part();

    union(){

        if (bottomshift > offset_extension)  translate([0,0,-(2*offset_extension)+offset_extension])  cutoff();
        else translate([0,0,-(2*offset_extension)+bottomshift])  cutoff();

       if (topshift > offset_extension)  translate([0,0,(bottomheight+lowmiddleheight+upmiddleheight+(2*topheight))])  cutoff();
       else  translate([0,0,(bottomheight+lowmiddleheight+upmiddleheight+topheight)+(offset_extension)-topshift])  cutoff();
        }

 }

module vent() {
 for(i=[0:num_ventholes])
    {
    rotate([0,0,i*vent_ang])

     difference(){
    translate([adapter_radius+venthole+vent_dist,0,-layer]) cylinder($fn = 3,h=layer*5, r=(venthole/2));
    translate([adapter_radius+venthole+vent_dist,0,-layer]) cylinder($fn = 3,h=layer*6, r=(venthole/2-(3*layer)));
     }
    }

}
module cutoff() {
     cylinder($fa = 3,h=(offset_extension), d=2*(insideradius+offset_extension));
     translate([0,0,+offset_extension])  adapter();
     translate([0,0,+offset_extension])  vent();
}

module part() {
difference(){

    union(){                                                                                shade();
    translate([0,0,0]) if (crossed == "yes") mirror([1,0,0])                                  shade();

    translate([0,0,-offset_extension]) if (ring_low == "yes")                                  ring();

    translate([0,0,(bottomheight+lowmiddleheight+upmiddleheight+topheight)-offset_extension])
                                       if (ring_up == "yes")                                   ring();

}

           if (ring_low == "yes") translate([0,0,(-offset_extension-layer-bottomshift)])      adapter();
           else  translate([0,0,-layer]) adapter();

          if (ring_low == "yes")  translate([0,0,(-offset_extension-layer-bottomshift)]) vent();
           else  translate([0,0,-layer]) vent();
}
}

module ring() {
  cylinder($fa = 3,h=bottomringheight, d1=2*insideradius, d2=2*(insideradius+offset_extension));
 translate([0,0,offset_extension]) cylinder($fa = 3,h=bottomringheight, d1=2*(insideradius+offset_extension), d2=2*insideradius);
}

module shade() {

    union(){
                                                                                partial_bottom();

        translate([0,0,bottomheight])rotate([0,0,-(bottomtwist)])                                   partial_middle_low();
        translate([0,0,bottomheight+lowmiddleheight]) rotate([0,0,-(bottomtwist+lowmiddletwist)])   partial_middle_up();
        translate([0,0,bottomheight+lowmiddleheight+upmiddleheight])rotate([0,0,-(bottomtwist+lowmiddletwist+upmiddletwist)])    partial_top();

    }

}

module adapter() {
    difference(){
    cylinder($fa = 3,h=layer*4, r=adaptersize);

    translate([0,0,-layer])cylinder($fa = 3,h=layer*6, r=adaptersize-(2*nozzle));
}
}
module partial_bottom() {

    cylinder($fa = 3,h=bottomheight, r=insideradius);

for(i=[0:num_extensions])
    {
    rotate([0,0,i*angle_number_extension])  translate([0,0,0]) extension_bottom();
    }

}
module partial_middle_low() {

    cylinder($fa = 3,h=lowmiddleheight, r=insideradius);

for(i=[0:num_extensions])
    {
    rotate([0,0,i*angle_number_extension])  translate([0,0,0]) extension_middle_low();
    }

}

module partial_middle_up() {

    cylinder($fa = 3,h=upmiddleheight, r=insideradius);

for(i=[0:num_extensions])
    {
    rotate([0,0,i*angle_number_extension])  translate([0,0,0]) extension_middle_up();
    }

}

module partial_top() {

    cylinder($fa = 3,h=topheight, r=insideradius);

for(i=[0:num_extensions])
    {
    rotate([0,0,i*angle_number_extension])  translate([0,0,0]) extension_top();
    }

}

module extension_bottom() {
linear_extrude (height = bottomheight, convexity = 10, twist = bottomtwist, slices = slices){
    hull() {
   rotate([90,0,extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-5),bottomheight]]);

    rotate([90,0,-extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    }
}
}
module extension_middle_low() {
linear_extrude (height = lowmiddleheight, convexity = 10, twist = lowmiddletwist, slices = slices){
    hull() {
   rotate([90,0,extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    rotate([90,0,-extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    }
}
}
module extension_middle_up() {
linear_extrude (height = upmiddleheight, convexity = 10, twist = upmiddletwist, slices = slices){
    hull() {
   rotate([90,0,extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    rotate([90,0,-extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    }
}
}
module extension_top() {
linear_extrude (height = topheight, convexity = 10, twist = toptwist, slices = slices){
    hull() {
   rotate([90,0,extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    rotate([90,0,-extensionangle])
 polygon(points=[[insideradius-2,0],[(insideradius+offset_extension),0],[(insideradius+offset_extension),bottomheight],[(insideradius-2),bottomheight]]);

    }
}
}
```


[User]
I'm looking to create a design with a smaller cube inside a larger, cut-away cube, kind of like a cage. The inner cube should be fully enclosed but not touching the outer cube.

The outer cube will have sections cut out of each of its faces, effectively creating a frame. These cut-outs should consist of:
1.  Cylindrical discs located at the midpoints of each face. These discs should have a radius a bit larger than half the inner cube's side length.
2.  Cylindrical holes that pass all the way through the outer cube centered on each axis.

I'd like the design to be parametric, so I can change the size of the inner and outer cubes. Specifically, I need parameters for the outer cube's side length and the inner cube's side length. I'd like to be able to specify the dimensions of the inner and outer cubes using the variables `o_s` and `i_s` respectively. The size of the discs and holes should be calculated based on these parameters. The radius of the discs should be approximately half of the average of the outer and inner cube sizes plus a small amount of the inner cube's size, so `(o_s+(i_s/5))/2` should be a good starting point, and their height should be based on the difference in size between the cubes divided by 4, so `(o_s-i_s)/2/2`, or `(o_s-i_s)/4`. The disc's position should be based on half of the inner cube's size plus half the disc's height, so `(i_s/2)+ht/2`. The radius of the holes should be based on the outer cube size, minus approximately 5/6 of the inner cube's side, all divided by 2, or `(o_s-(i_s*5/6))/2`.

Could you generate the OpenSCAD code for this design?

[Assistant]
cube_in_cube.scad:
```
o_s=32;
i_s=20;

outer_cube();
inner_cube();

module inner_cube()
{
	cube([i_s, i_s, i_s], center=true);
}

module outer_cube()
{
	difference()
	{
		cube([o_s, o_s, o_s], center=true);
		union()
		{
			discs();
			holes();
		}
	}
}

module discs()
{
	rad=(o_s+(i_s/5))/2;
	ht=(o_s-i_s)/2/2;
	sh=(i_s/2)+ht/2;

	translate([0,0,sh])
	cylinder(r=rad, h=ht, center=true);
	translate([0,0,-sh])
	cylinder(r=rad, h=ht, center=true);

	translate([0,sh,0])
	rotate([90,0,0])
 	cylinder(r=rad, h=ht, center=true);
	translate([0,-sh,0])
	rotate([90,0,0])
	cylinder(r=rad, h=ht, center=true);

	translate([sh,0,0])
	rotate([0,90,0])
 	cylinder(r=rad, h=ht, center=true);
	translate([-sh,0,0])
	rotate([0,90,0])
	cylinder(r=rad, h=ht, center=true);
}

module holes()
{
	rad=(o_s-(i_s*5/6))/2;
//	rad=(i_s*1.45/2);

	cylinder(r=rad, h=o_s, center=true);
	rotate([90,0,0])
	cylinder(r=rad, h=o_s, center=true);
	rotate([0,90,0])
	cylinder(r=rad, h=o_s, center=true);
}

```


[User]
Hey, I'm looking to create a parametric design for a bearing cover, similar to a dust cap or seal. I want it to be customizable with text wrapping around its circumference, as well as have options for a retainer ring and rings above both the inner and outer radii.

Here's what I'm thinking in terms of specific parameters and how they should affect the design:

**Text Customization:**

*   `shape_text`: The text to be printed around the circumference. I need this to be a string value that I can change.
*   `text_font`: The font to use for the text. I'd like this to accept a string and use a font from the system fonts.
*   `text_size`: The point size of the text. This should be a numerical value.
*   `text_thickness`: The thickness of the text above the base, also numerical.
*   `text_rotation`:  The rotation angle of the text in degrees - positive to read from inside the cover, negative from outside. A zero value would effectively create a vertical text column if that makes sense.
*   `text_offset`: The offset in mm of the text from the center of the base; this should be a negative value if I want the text on the circumference.

**Base Shape:**

*   `inner_base_radius`: The inside radius of the base. This needs to be a numerical value and should be big enough to allow a bearing to spin freely.
*   `outer_base_radius`: The outside radius of the base, also numerical and sized to snap into the dust cap ring inside the bearing race.
*  `base_thickness`: The thickness of the main base. This will be a numerical value.

**Retainer Ring:**

*   `print_retainer_ring`: A boolean (1 for yes, 0 for no) to enable or disable the retainer ring.
*   `retainer_ring_thickness`:  The thickness of the retainer ring. Should be thinner than the base. Numerical.
*   `retainer_ring_width`:  The width of the retainer ring. Numerical.

**Optional Top Rings:**

*   `print_top_inner`:  A boolean to enable/disable an inner ring on top of the base.
*   `top_inner_width`: The width of the top inner ring if enabled. Numerical.
*   `top_inner_thickness`: The thickness of the top inner ring if enabled. Numerical.

*   `print_top_outer`: A boolean to enable/disable an outer ring on top of the base.
*   `top_outer_width`:  The width of the top outer ring if enabled. Numerical.
*  `top_outer_inset`: The distance the outer ring is inset from the outer radius. Numerical.
*   `top_outer_thickness`: The thickness of the top outer ring. Numerical.

I'd like the code to have a modular structure, so it's easier to read and potentially re-use if I need to create other similar parts. I would like to make sure I'm using MCAD for any modules, since I'm familiar with those. I don't think I need any other libraries, but if you find something else that makes things easier then please feel free to include it.

The intended output will be for 3D printing, so I also need the OpenSCAD to render correctly and allow for standard STL exports, and of course for all of the parameters to be adjustable so I can dial it in to the right dimensions.

Could you generate the parametric OpenSCAD code for me? I'm excited to see what you come up with!

[Assistant]
KODA_Design_Bearing_Cover_With_Retainer.scad:
```
// Written in 2017 by Erick Kobres <ekobres@gmail.com>
//
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to the
// public domain worldwide. This software is distributed without any
// warranty.

/* [Text] */
// Text to print around the circumference.
shape_text = "KODA-DESIGN-LTD-";
// Font to use (See fonts.google.com for options)
text_font = "Arial BLACK";
// Point size of the text.
text_size = 2.9;
// Thickness in mm of the text on top of the base.
text_thickness = .4;
// Degrees to rotate the text - negative to read from outside, positive to read from inside. (0 will print a circular "column".)
text_rotation = -90;
// Offset in mm of the text from the center of the base. (Negative)
text_offset = -8.1;

/* [Shape] */
// The inside radius of the base - make it big enough to allow your bearing to spin freely.
inner_base_radius = 6.4;
// The outside radius of the base - should snap into the dust cap ring inside the outer bearing race.
outer_base_radius = 9.7;
// Thickness of the base in mm.
base_thickness = .8;
// Select whether to print a retainer ring at the bottm of the base
print_retainer_ring = 1;//[1:Yes, 0:No]
// Retainer ring thickness - should be thinner than the base
retainer_ring_thickness = .4;
// Retainer ring width in mm.
retainer_ring_width = .2;

// Select whether or not you want a ring above the inner radius.
print_top_inner = 0;//[1:Yes,0:No]
// Enter the width of the inner ring in mm.
top_inner_width = .4;
// Enter the thickness of the inner ring in mm.
top_inner_thickness = .4;

// Select whether or not you want a ring above the outer radius.
print_top_outer = 0;//[1:Yes, 0:No]
// Enter the width of the outer ring in mm.
top_outer_width = .4;
// Enter the inset of the outer ring in mm.
top_outer_inset = .2;
// Enter the thickness of the outer ring in mm.
top_outer_thickness = .4;

/* [Hidden] */

$fs=.1;
$fa=.1;

top_outer_radius = outer_base_radius-top_outer_inset;
chars = len(shape_text);

cover_profile_base = [[inner_base_radius,0],[outer_base_radius,0],[outer_base_radius,base_thickness],[inner_base_radius,base_thickness]];
cover_profile_retainer = [[outer_base_radius-.1,0], [outer_base_radius+retainer_ring_width, 0], [outer_base_radius+retainer_ring_width,retainer_ring_thickness],[outer_base_radius,retainer_ring_thickness]];
cover_profile_top_inner = [[inner_base_radius,0],[inner_base_radius,top_inner_thickness],[inner_base_radius+top_inner_width,top_inner_thickness],[inner_base_radius+top_inner_width,0]];
cover_profile_top_outer = [[top_outer_radius-top_outer_width,0],[top_outer_radius-top_outer_width,top_outer_thickness],[top_outer_radius,top_outer_thickness],[top_outer_radius,0]];

    color("white",1.0)
    rotate_extrude()
    polygon(cover_profile_base);

  if(print_retainer_ring){
    color("white",1.0)
    rotate_extrude()
    polygon(cover_profile_retainer);
  }

if(print_top_inner){
    color("blue",1.0)
    translate([0,0,base_thickness])
    rotate_extrude()
    polygon(cover_profile_top_inner);
}

if (print_top_outer){
    color("blue",1.0)
    translate([0,0,base_thickness])
    rotate_extrude()
    polygon(cover_profile_top_outer);
}

    color("blue")
    translate([0,0,base_thickness])
    for (r = [1:1:chars] )
    {
    rotate(r*(360/chars)){
        translate([text_offset,0])
        rotate(text_rotation)
        t(shape_text[r-1], text_size,text_thickness,":style=bold");
     }
}

// Helper to create text
module t(t, s = 3, h = 2, style = "") {
    linear_extrude(height = h)
      text(t, font = str(text_font,style), size = s, halign="center", valign="center");
}
```


[User]
Hi, I'm looking for an OpenSCAD design for a customizable fan duct, specifically for 3D printers, that I can tweak to fit various printer setups. I've seen some designs online, but they don't offer the flexibility I need for my particular setup, where the nozzle is often positioned higher than typical.

I'd like to be able to adjust the following parameters:

*   **`fan_height`**: The overall height of the fan duct, measured from the bottom of the heater block (or slightly below if needed) to the lip of the fan insert hole. It should not include the insert portion height itself.
*   **`measured_nozzle_distance`**: The horizontal distance from the inside left corner of the fan duct to the nozzle tip.
*   **`measured_fan_offset`**: A horizontal offset of the fan in relation to the main body of the duct, also measured from the fan's inside left corner to the nozzle tip.
*   **`fan_type`**: Should allow for selecting a half-torus or a full torus design for the main air channel. This should be a simple boolean switch (0 for half, 1 for full).
*   **`fan_side_clip`**: Should allow for adding or removing side snap tabs, a boolean switch (0 for No, 1 for Yes).
*   **`fan_insert_width`**: The width of the top insert that fits into the fan, matching the fan hole.
*   **`fan_insert_length`**: The length of the top insert, again to fit into the fan.
*  **`fan_insert_height`**: The height of the top insert
*   **`fan_thickness`**: The thickness of the fan torus/air channel and the throat.
*   **`fan_diameter`**: The measured center diameter of the fan torus.
*   **`fan_shoulder`**: The width of the rim around the top insert.
*   **`skin_thickness`**: The thickness of the internal skin of the duct.
*   **`top_skin_thickness`**: The thickness of the skin of the top insert.
*   **`vent_cutout_offset`**: Vertical offset adjustment for the vent holes for controlling the airflow angle.
*   **`vent_hole_radius`**: The size of the vent holes.
*   **`pad`**: Manifold padding, a small value to prevent Z-fighting.

I'd prefer a design that uses a mix of cube, cylinder, hull, and torus shapes, similar to the design that inspired this request, and allows for easy modification to suit my printer. Specifically, I like the idea of using fillets for a smoother design around the edges. I'd like to be able to select the number of segments that the circles and curves are built out of (I think that would be `$fn`) , with a default of 50. Also, I would like the side clip design to use triangle shapes for the clips on the top insert.

Finally, It should be easy to adjust the air vent angles.

I don't have any preference for a specific library to use, but if there is a recommended one for this type of design, feel free to use it.

Thanks in advance!

[Assistant]
customizable_fan_v1.scad:
```
/* [Main parameters] */
//height of fan measured from heating block bottom (or a bit lower if needed)to the fan insert hole lip
fan_height=24; //does not include insert portion height

//measured from fan inside left corner to nozzle tip
measured_nozzle_distance=36;
//measured from fan inside left corner to nozzle tip
measured_fan_offset=-5.3;

//0: half torus , 1: full torus
fan_type=0; //[0:half,1:full]

//fan side snap tongue
fan_side_clip=1; //[0:No,1:Yes]
$fn=50;//shape resolution
/* [Advanced parameters]*/

//top insert width to match fan hole
fan_insert_width=16.8;
//top insert length to match fan hole
fan_insert_length=13.2;
//top insert height
fan_insert_height=7;

//hight of fan torus and throat
fan_thickness=7;
//measured center radius
fan_diameter=50;
//rim width around top insert
fan_shoulder=1.3;
//thickness of internal skin
skin_thickness=1.6;
//thickness of top insert skin
top_skin_thickness=1.6;
//angle adjustment for air flow direction downwards
vent_cutout_offset=-6;
//size of vent holes
vent_hole_radius=1.3;

//manifold padding
pad=0.01;

/* [hidden] */
vent_angle=80;
vent_angle_start=-10;
vent_angle_shift=-16;
fan_length=measured_nozzle_distance-fan_diameter/2+fan_insert_length+fan_shoulder;
fan_width=fan_insert_width+fan_shoulder*2;
fan_top_length=fan_insert_length+fan_shoulder*2;
fan_throat_length=fan_length-fan_top_length-fan_thickness/2;
r1=fan_thickness;
//r1=fan_height/2>fan_thickness?fan_thickness:fan_thickness/2;
//r1=fan_thickness/2;
r2=fan_top_length/2-skin_thickness;
fan_offset=-(measured_fan_offset+fan_insert_width/2);
tab_width=2;

//echo(fan_length,fan_top_length,fan_throat_length,fan_offset);

//main program loop

rotate([0,0,180]) union() {
    difference() {
        union() {
            difference() {
               main_shape();
               main_shape_cutout();
            }
            circular_fan_shape();
        }
        circular_fan_shape_cutout();

     }
     difference() {
        top_insert_shape();
         if(fan_side_clip)
            tab_cutout();
     }
}

//modules section

 module main_shape() {
        union() {
            difference() {

            //middle upper section
                translate([0,0,0]) cube([fan_width,fan_top_length,fan_height],center=false);

            //rear slanted cutout
                hull() {
                    translate([-pad,-4.5,fan_height-6]) cube([fan_width+pad*2,3.8,4]);
                   translate([-pad,0,-4]) cube([fan_width+pad*2,5,4]);
                }
            }

            difference() {
            //horizontal section
               translate([0,fan_top_length,0]) cube([fan_width,fan_throat_length+fan_diameter/2,fan_thickness],center=false);

            //horizontal section cut out
              translate([skin_thickness,fan_top_length,skin_thickness]) cube([fan_width-(skin_thickness*2),fan_throat_length+pad*2,fan_thickness-(skin_thickness*2)],center=false);

                  //front cutout to match round fan profile
        translate([fan_offset+fan_width/2,fan_length+fan_diameter/2+fan_thickness/2,-fan_thickness/2])
   cylinder(r=fan_diameter/2,h=fan_thickness*2);

            }
            //front fillet
           translate([fan_width/2,fan_top_length,fan_thickness]) rotate([0,-90,0]) fillet(r1/2,fan_width);

        }

}

module main_shape_cutout() {

    slope_distance=3;

      translate([skin_thickness,0,skin_thickness]){
                //main internal shape with rounded flow
           difference() {
              union() {
                        //slanted inside cut
                 hull() {
                      translate([0,fan_top_length/2,fan_height]) rotate([0,90,0]) cylinder(r=r2,h=fan_width-skin_thickness*2);
                           translate([0,slope_distance+fan_top_length/2,r2]) rotate([0,90,0]) cylinder(r=r2,h=fan_width-skin_thickness*2);
                        }
                        //horizonal lower cut
                       hull() {
                              translate([0,fan_top_length/2+r2/2,r2]) rotate([0,90,0]) cylinder(r=r2,h=fan_width-skin_thickness*2);
                              translate([0,fan_length*2,r2]) rotate([0,90,0]) cylinder(r=r2,h=fan_width-skin_thickness*2);
                        }
                    }

                   translate([-.1,fan_top_length-skin_thickness,-skin_thickness*2]){
                        //vertical front cut
                        hull() {
                         translate([-.5,r1,fan_height+r2]) rotate([0,90,0]) cylinder(r=r1,h=fan_width-skin_thickness*2+1);
                          translate([-.5,r1-skin_thickness/2,r1*2]) rotate([0,90,0]) cylinder(r=r1,h=fan_width-skin_thickness*2+1);
                        }
                        //horizonal top cut
                         hull() {
                             translate([-.5,r1+skin_thickness,r1*2]) rotate([0,90,0]) cylinder(r=r1,h=fan_width-skin_thickness*2+1);
                           translate([-.5,fan_length*2,r1*2]) rotate([0,90,0]) cylinder(r=r1,h=fan_width-skin_thickness*2+1);
                        }
                       //top horizontal cut
                      //translate([0,fan_top_length/2,fan_thickness]) cube([fan_width+.1,fan_length*2,fan_height]);

                    }
                }

        }

}

module circular_fan_shape() {

    translate([fan_offset+fan_width/2,fan_length+fan_diameter/2+fan_thickness/2,fan_thickness/2]) {

        difference() {
            //fan torus
            difference() {
                translate([0,0,0]) torus(fan_thickness,fan_diameter,-fan_thickness/2,-180);

                if(fan_type==0)
                //cut in half if needed
               translate([-fan_diameter/2-fan_thickness,0,-fan_thickness/2-skin_thickness])cube([fan_diameter+fan_thickness*2+10,fan_diameter,fan_thickness+pad*2+skin_thickness*2]);

            }

            //vent ports cutout
                for (a =[vent_angle_start:vent_angle_shift:-360]) {
                    translate([0,0,vent_cutout_offset])
                    rotate([0,vent_angle,a])
                            cylinder(r=vent_hole_radius,h=fan_diameter/2+fan_thickness/2-skin_thickness*2);

                 }

        }
    }
}

module circular_fan_shape_cutout() {

     difference () {
         //torus inside round cutout 360 degs

         translate([fan_offset+fan_width/2,fan_length+fan_diameter/2+fan_thickness/2,fan_thickness/2])
          torus(fan_thickness-(skin_thickness*2),fan_diameter,-fan_thickness/2);

        // torus(fan_thickness,fan_diameter,-fan_thickness/2,-180);

         //half torus cutout if chosen
         if(fan_type==0)
        translate([-fan_diameter/2+fan_offset+fan_thickness/2,fan_length+fan_diameter/2+fan_thickness/2-skin_thickness,-pad])cube([fan_diameter+fan_thickness*2,fan_diameter,fan_thickness+pad*4]);

    }
    difference() {
    // inside torus square throat cutout
          translate([skin_thickness,fan_length,skin_thickness-pad]) cube([fan_width-skin_thickness*2,fan_thickness+skin_thickness,fan_thickness-(skin_thickness*2)+pad],center=false);

      //now make the throat cutout match fan round shape
           translate([fan_offset+fan_width/2,fan_length+fan_diameter/2+fan_thickness/2,-fan_thickness/2])
       cylinder(r=fan_diameter/2,h=fan_thickness*2);
    }
}

module top_insert_shape() {

        //top insert

        difference(){
            //outer insert
            union() {
               translate([0,0,fan_height-top_skin_thickness])  cube([fan_width,fan_top_length,top_skin_thickness]);
                translate([fan_shoulder,fan_shoulder,fan_height])  cube([fan_insert_width,fan_insert_length,fan_insert_height]);
            }
            //inside cutout
            translate([fan_shoulder+top_skin_thickness,fan_shoulder+top_skin_thickness,fan_height-top_skin_thickness-pad])  cube([fan_insert_width-top_skin_thickness*2,fan_insert_length-top_skin_thickness*2,fan_insert_height+top_skin_thickness*2]);
        }
      //right inside bottom fillet
     translate ([skin_thickness-.2,fan_top_length/2,fan_height-top_skin_thickness]) rotate([90,90,0]) fillet(top_skin_thickness,fan_top_length-pad);
     //left inside bottom fillet
     translate ([fan_width-skin_thickness+.2,fan_top_length/2,fan_height-top_skin_thickness]) rotate([90,90,180]) fillet(top_skin_thickness,fan_top_length-pad);
     //front inside bottom fillet
   translate ([fan_width/2,fan_top_length-skin_thickness+.2,fan_height-top_skin_thickness]) rotate([180,90,0]) fillet(top_skin_thickness,fan_width-pad);
    //back inside bottom fillet
  translate ([fan_width/2,fan_shoulder,fan_height-top_skin_thickness]) rotate([0,90,0]) fillet(top_skin_thickness,fan_width-pad);

     if (fan_side_clip) {
         //right half arrow on tab
         translate ([fan_shoulder+pad,tab_width/2+fan_insert_length/2+.25,fan_height+fan_insert_height-2])rotate([0,0,0])
        triangle(top_skin_thickness/2,top_skin_thickness,tab_width);

         //left half arrow on tab
         translate ([fan_shoulder+fan_insert_width-pad,tab_width/2+fan_insert_length/2+.25,fan_height+fan_insert_height-2])rotate([0,0,180])
        triangle(top_skin_thickness/2,top_skin_thickness,tab_width);
     }

}

module tab_cutout() {

    //cut 4 slots ( 2 slots each side) to create tabs
      translate ([fan_shoulder-pad-top_skin_thickness,fan_shoulder+fan_insert_length/2+tab_width/2,fan_height+tab_width/2])cube([top_skin_thickness*2+pad*2,.5,fan_insert_height]);

      translate ([fan_shoulder-pad-top_skin_thickness,fan_shoulder+fan_insert_length/2-tab_width/2-.5,fan_height+tab_width/2])cube([top_skin_thickness*2+pad*2,.5,fan_insert_height]);

      translate ([fan_shoulder+fan_insert_width-top_skin_thickness-pad,fan_shoulder+fan_insert_length/2+tab_width/2,fan_height+tab_width/2])cube([top_skin_thickness*2+pad*2,1,fan_insert_height]);
      translate ([fan_shoulder+fan_insert_width-top_skin_thickness-pad,fan_insert_length/2-.5,fan_height+tab_width/2])cube([top_skin_thickness*2+pad*2,1,fan_insert_height]);

}

module triangle(b,h,w) {

    rotate(a=[90,-90,0])
 linear_extrude(height = w, center = true, convexity = 10, twist = 0)
 polygon(points=[[0,0],[h,0],[0,b]], paths=[[0,1,2]]);
}

module fillet(r, h) {

    translate([r / 2, r / 2, 0])
        difference() {
            cube([r + pad, r + pad, h], center = true);
            translate([r/2, r/2, 0])
                cylinder(r = r, h = h + 1, center = true);
        }
}

module torus (th, dia,off,angle) {

 hull_offset_adj=1;
 d1lb3rt66=0;
 rotate_extrude(angle=-360,convexity = 10)

    union() {
         difference() {

                hull() {

                    translate([dia/2, 0, 0]) circle(r=th/2,center=false);
                   translate([dia/2-th/2-hull_offset_adj,-th/2+th/8,0]) circle(r=th/8,center=false);

                }

               * translate([0,-th/2+th/8-d1lb3rt66,0]) rotate([180,0,0])  square([dia,th]);
        }

    }
}

```


[User]
I'm looking to create a customizable sewing guide that attaches to a sewing machine using magnets. I've seen some designs that use either cylindrical or rectangular magnets, and I'd like the flexibility to use either. The guide itself needs to be a sort of bar with angled sides that'll sit flush on the machine.

Here are the main things I need to be able to adjust:

*   **Overall Guide Dimensions:** I want to control the height and thickness of the guide, as well as the length of the angled sides and the length of the main guiding bar section.
*   **Magnet Type:** The design should work with either rectangular or cylindrical magnets, and I should be able to select which type I'm using.
*   **Magnet Dimensions:** For both cylinder and rectangular magnets, I need to specify their individual dimensions (radius and height for cylinders, and length, width, and height for rectangles).
*   **Magnet Spacing:** I need to set the distance between the two magnets within the guide.
*   **Rounding Smoothness:** The corners of the guide shouldn't be too sharp, so I need a parameter to control the smoothness/resolution of the rounding.
*   **Test Piece Option:** I'd also like the ability to print small test pieces that have the magnet holes, so I can verify the fit of my magnets before printing the whole guide.

I'm looking for the design to be parametric, meaning I can adjust all these parameters and regenerate the design. I'm not too picky about the structure of the files, but I'd prefer it to use common OpenSCAD libraries rather than writing all of the code from scratch, if that is something the AI assistant could manage. I don't need any complex file structures, either, just one or two files at most is fine.

I don't have any specific requests for the library choices, but I know there are a few available, so whatever works best for creating these parametric shapes is fine by me.

Thanks in advance for the help!

[Assistant]
Custom_Sewing_Guide.scad:
```
//	Customizable Bobbin Thread Spool Holder
//	Copyright by Drato Lesandar - Anika Uhlemann - RobotMama

/* [Guide] */
// Height of the whole guide in mm
guideHeight = 6;
// Thickness of the whole guide in mm
guideT = 10;
// Length of the angled sides in mm
sideLength = 15;
// Length of the actual guiding part in mm
barLength = 60;
// Magnet Type (Testpieces are for fast prints, to test magnet fitting)
magType = 0; //[0:Rectangle, 1:Cylinder, 2:TestPieceCylinder, 3:TestPieceRectangle]
// Distance between the two magnets in mm
distMag = 25;

/* [Cylinder Magnets] */
// Radius of cylinder magnet in mm
cylMagRad = 5.1;
// Height of cylinder magnet in mm
cylMagHeight = 5.2;

/* [Rectangle Magnets] */
// Length of rectangle magnet in mm (part that goes along bar)
rectMagLength = 5.1;
// Width of rectangle magnet in mm (part that goes along width of bar)
rectMagWidth = 5.1;
// Height of rectangle magnet in mm
rectMagHeight = 5.4;

/* [Other] */
// How smooth the roundings are (the bigger the value the smoother)
$fn = 40;
rotate ([0,180,0])
if(magType==0 || magType==1) { // Print ready guide
    difference() {
        union() {
            sideCoords = (sideLength)/sqrt(2);
            hull() {
                cylinder(guideHeight, r = guideT/2, center = false);
                translate ([0,barLength,0])
                cylinder(guideHeight, r = guideT/2, center = false);
            }
            hull() {
                cylinder(guideHeight, r = guideT/2, center = false);
                translate ([sideCoords,-sideCoords,0])
                cylinder(guideHeight, r = guideT/2, center = false);
            }
            hull() {
                translate ([0,barLength,0])
                cylinder(guideHeight, r = guideT/2, center = false);
                translate ([sideCoords,sideCoords+barLength,0])
                cylinder(guideHeight, r = guideT/2, center = false);
            }
        }

        if(magType==1) { //Cylinder Hole
            translate ([0,0.5*barLength+0.5*distMag,-0.05])
            cylinder(cylMagHeight+0.05, r = cylMagRad, center = false);
            translate ([0,0.5*barLength-0.5*distMag,-0.05])
            cylinder(cylMagHeight+0.05, r = cylMagRad, center = false);
        } else { //Rectangle Hole
            translate ([-rectMagWidth*0.5,0.5*barLength+0.5*distMag,-0.05])
            cube([rectMagWidth, rectMagLength, rectMagHeight+0.05], center = false);
            translate ([-rectMagWidth*0.5,0.5*barLength-0.5*distMag,-0.05])
            cube([rectMagWidth, rectMagLength, rectMagHeight+0.05], center = false);
        }
    }
} else { // Smaller TestPiece to test magnet fitting
    if(magType==2) { //Cylinder Hole
        difference() {
            translate ([0,0,0.05])
            cylinder(cylMagHeight+0.05+2, r = cylMagRad+1, center = false);
            cylinder(cylMagHeight+0.05, r = cylMagRad, center = false);
        }
    } else { //Rectangle Hole
        difference() {
            translate ([-1,-1,0.05])
            cube([rectMagWidth+2, rectMagLength+2, rectMagHeight+0.05+2], center = false);
            cube([rectMagWidth, rectMagLength, rectMagHeight+0.05], center = false);
        }
    }
}
```


[User]
I'm looking for a new tolerance test design, something that's more robust and less prone to issues with overhangs. I've been having trouble with the Maker's Muse version where the overhangs bind before the actual pins are fully tested.

Basically, I want a test where the pins are held in place by a central band, and there's some clearance (say 1mm) around the band so the pins can move a bit along the Z-axis. This also helps with freeing them if they're stuck. The pins should be able to be turned free, ideally using an 8mm hex key. It would be great if edges were chamfered to avoid first layer problems.

I need it to be parametric, so I can adjust things like the pin size and clearance for different materials and printers. I like the general structure of the example I found, but I want to make sure that the pins are definitely free, and I think that by making it so that the pins are not restrained by overhangs, I can get better, more useful results.

Here's the info I've got from the example, so you have a starting point, but feel free to make improvements as you see fit.

*   **Tolerances:** It used a list of tolerances, so it would be great if that could remain a parameter: `tolerances = [0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1];` I'd like to be able to modify this.

*   **Pin Height:** Also parameterized at `pin_height = 10;`, and it's suggested to be in a range of [10:20].

*   **Pin Radius:** The starting radius is set as `pin_radius = 7.5;`, with a suggested range of [5:0.5:10].

*   **Collar Clearance:** The collar clearance started at `collar_clearance = 1;`, with a suggested range of [1:0.5:2].

*   **Hex Wrench Size:** This was set at `pin_hex = 6;`, and it allowed for 5, 6, and 8mm wrench sizes. I'd like to keep that.

*  **Font Size Multiplier:** This was set at `font_size = 85;` and it was used to scale the text on each of the pins. I'd like to keep that a parameter, but make it actually correspond to a size, not a multiplier, if that's possible.

The example also had a separation value that made sure all pins are separated. Also, it used a 6 sided pattern and a rotation to make all of the pins. Can you use these principles to make a new tolerance test for me? I'd really appreciate a parametric, well-structured OpenSCAD file that would let me change all of these values, and not be bothered by overhangs.

[Assistant]
Tolerance_Test.scad:
```
// Tolerances to test *Must be 7 values*
tolerances = [0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1];

// Object height
pin_height = 10; //[10:20]

// Pin radius
pin_radius = 7.5; //[5:0.5:10]

// Collar clearance
collar_clearance = 1; //[1:0.5:2]

// Hex wrench size (measured across flats)
pin_hex = 6; //[5, 6, 8]

// Font size multiplier
font_size = 85; //[0:5:100]

/* {Hidden] */
pin_hex_r = ((1/cos(30))*(pin_hex/2)*1.05);
separation = (pin_radius + collar_clearance*2 + tolerances[0] + 0.5)*2;
separation_matrix = [[0, 0], [0, 1], [0.866, 0.5], [0.866, -0.5], [0, -1], [-0.866, -0.5], [-0.866, 0.5]];
font_size_factor = 0.65*(font_size/100);
$fn=60*1;

// Make carrier
difference(){
  for (a = [0:6]){ //base shape
    translate([separation_matrix[a][0]*separation, separation_matrix[a][1]*separation, 0])
      cylinder(r=(separation/2)*1.15, h=pin_height);
  }
  for (a = [0:6]){ //remove pins with the appropriate clearances
    translate([separation_matrix[a][0]*separation, separation_matrix[a][1]*separation, 0])
      make_pin(pin_radius+tolerances[a], collar_clearance*2, "", false);
  }
}
// Make pins
for (a = [0:6]){
  translate([separation_matrix[a][0]*separation, separation_matrix[a][1]*separation, 0])
  make_pin(pin_radius, collar_clearance, str(tolerances[a]), true);
}

module make_pin(radius, collar, pin_text = "", hex_key = false) {
  intersection(){
    difference(){
      union(){
        cylinder(r=radius, h=pin_height); //base pin
        translate([0, 0, pin_height/2]){ //collar
          rotate_extrude(convexity = 10)
          translate([radius, 0, pin_height/2])
          circle(r = collar, $fn = 100);
        }
        cylinder(r1=radius+1, r2=radius, h=1); //bottom outward chamfered edge - gets removed on the pins
        translate([0, 0, pin_height-1])
          cylinder(r2=radius+1, r1=radius, h=1); //top outward chamfered edge - gets removed on the pins
      }
      if (hex_key==true) {
        cylinder(r=pin_hex_r, h=(pin_height/2), $fn=6); //hex-wrench cutout
      }
      translate([0,0,pin_height-1]){
        linear_extrude(1) text(text=pin_text, size=pin_radius*font_size_factor, halign="center", valign="center", height=5); //tolerance text
      }
    }
    if (pin_text!=""){ //chamfer pin
      union(){
        translate([0, 0, pin_height/2])
        cylinder(r1=radius+(pin_height/2)-1, r2=radius-2, h=(pin_height/2)+1);
        translate([0, 0, -1])
        cylinder(r2=radius+(pin_height/2)-1, r1=radius-2, h=(pin_height/2)+1);
      }
    }
  }
}

```


[User]
I'd like to design a parametric fidget spinner with paw-shaped arms. I'm thinking it should have a few options I can tweak.

First, I'd like to be able to set the number of paws, probably with a dropdown or something that lets me choose between 2, 3, 4, or 5. Then, I need to set the paw size in millimeters, maybe with a slider that goes between 15 and 25 mm in 1 mm increments.

Next, I'd want to choose the style of the "impression" where the paw meets the central bearing. This would be another dropdown with options like "cutout", "emboss", "deboss", and "deboss+border".

I would also like the option to rotate the paw 90 degrees, using a yes/no toggle. And finally a yes/no toggle for including claws on the paws.

I think that covers all the features I need. I'm expecting the design to use a standard 608 bearing (22mm outer diameter, 7mm thick, 8mm inner diameter) at the center and should be parametric enough for me to modify the sizes, or at least use variables at the beginning of the file.

[Assistant]
solid-paw-2017-06-12.scad:
```
// paw spinner
// lucina
// 2017-06-08
/* [paw spinner settings] */
// number of paws for the spinner
paws = 3;  //[2, 3, 4, 5]
// size of paw in mm if type of weight is none
pawSize = 20; //[15:1:25]
// impression style
impression = "emboss";   //[cutout, emboss, deboss, deboss+border]
// rotate each paw 90 degrees
rotatePaw = "no";   //[yes, no]
// include claws
claws = "no";   //[yes, no]

/* [Hidden] */
// type of weight
$fn = 48;
x = 0; y = 1; z = 2; id = 3;
thick = 3;
inch = 25.4;
bearing608 = [22, 22, 7, 8];
bearing = bearing608;
none = [pawSize, pawSize, bearing[z]];

step = 360 / paws;
stop = (paws-1) * step;
weight = none;

pawAngle = (rotatePaw == "no") ? -90 : -180;
filRad = 2;
ff = .21;
ff2 = .28;
ffx = .75;
space = (impression=="deboss+border") ? 1.3*thick : .75*thick;
step = 360 / paws;
stop = (paws-1) * step;
pos = [60, 21, -21, -60];
off = [.28, .29, .29, .28];

module fcylinder(ht, wd, scaleX, rad) {
   resize([wd*scaleX, wd, ht])
   minkowski() {
      scale([scaleX, 1, 1]) {
         cylinder(h=ht-2*rad, d=wd-2*rad, center=true);
      }
      sphere(r=rad, center=true);
   }
}
module solidPaw(wid, ht) {
   echo("solidPaw", wid, ht);
   union() {
      for (a=[0:1:3]) {
         rotate([0, 0, pos[a]]) {
            translate([0, off[a]*wid, 0])
               scale([ffx, 1, 1])
                  cylinder(ht, d=wid*ff, center=true);
            if ( claws == "yes" )
               translate([0, off[a]*wid + wid*ff/2, 0])
//               cube([ff*wid*.2, 2, ht], center=true);
                  scale([1, ff*wid*.26, 1])
                     cylinder(h=ht, d=1.5, center=true);
         }
     }
      translate([0, -.07*wid, 0])
         cylinder(h=ht, d=1.3*wid*ff2, center=true);
      hull() {
         translate([-wid*ff2/2.1, -.9*wid*ff, 0])
            cylinder(h=ht, d=wid*ff2, center=true);
         translate([wid*ff2/2.1, -.9*wid*ff, 0])
            cylinder(h=ht, d=wid*ff2, center=true);
     }
  }
}
module emboss() {
   height = bearing[z];
   for ( angle = [0 : step : stop] ) {
      rotate([0, 0, angle])
         translate([(weight[x]+bearing[x])/2 + space, 0, 0])
            rotate([0, 0, pawAngle])
               union() {
                  difference() {
                     fcylinder(bearing[z], weight[x] + 2*thick, 1, filRad);
                     solidPaw(weight[x]+2*thick, height);
                  }
                  cylinder(h=bearing[z]-2*filRad, d=weight[x]+2*thick, center=true);
               }
   }
}
module deboss() {
   height = bearing[z]+2;
   for ( angle = [0 : step : stop] ) {
      rotate([0, 0, angle])
         translate([(weight[x]+bearing[x])/2 + space, 0, 0])
            rotate([0, 0, pawAngle])
               union() {
                  fcylinder(bearing[z], weight[x] + 2*thick, 1, 1.5);
                  translate([0, 0, 1])
                     solidPaw(weight[x]+2*thick, height);
               }
   }

}
module debossBorder() {
   height = bearing[z];
   for ( angle = [0 : step : stop] ) {
      rotate([0, 0, angle])
         translate([(weight[x]+bearing[x])/2 + space, 0, 0])
            rotate([0, 0, pawAngle])
               union() {
                  difference() {
                     fcylinder(bearing[z], weight[x] + 2*thick, 1, 1.5);
                        union() {
                           translate([0, 0, height/2])
                              cylinder(h=4, d=weight[x]+2*thick-4, center=true);
                           translate([0, 0, -height/2])
                              cylinder(h=4, d=weight[x]+2*thick-4, center=true);
                        }
                  }
                  solidPaw(weight[x]+2*thick, height);
               }
   }

}
module cutout() {
   height = 2*bearing[z];
   for ( angle = [0 : step : stop] ) {
      rotate([0, 0, angle])
         translate([(weight[x]+bearing[x])/2 + space, 0, 0])
            rotate([0, 0, pawAngle])
               difference() {
                  fcylinder(bearing[z], weight[x] + 2*thick, 1, filRad);
                  solidPaw(weight[x]+2*thick, height);
               }
   }
}
difference() {
   union() {
      if ( impression == "emboss" )
         emboss();
      if ( impression == "deboss" )
         deboss();
      if ( impression == "deboss+border" )
         debossBorder();
      if ( impression == "cutout" )
         cutout();
      fcylinder(bearing[z], bearing[x] + 2*thick, 1, filRad);
  }
   union() {
      cylinder(h=2*bearing[z], d=bearing[x], center=true);
   }
}

```


[User]
Hey, I'm looking to create a customizable fidget spinner cap, and I'd like to use OpenSCAD. I've seen a few designs online but want to make my own, and I need it to be parametric so I can easily adjust the dimensions.

Specifically, I need the cap to have a main disc, a small gap to fit over the spinner, and a raised circular section to house the bearing. The following dimensions should be configurable:

*   `disc_diameter_in_millimeter`: This controls the main diameter of the disc. It should default to 22mm which is the size of a common 608 bearing, but I need to be able to change it.
*   `disc_height_in_millimeter`:  The height of the main disc part of the cap, defaulting to 1.3mm.
*   `disc_edges`:  I want to be able to choose how many edges the disc has so it can be a triangle, square, pentagon, circle, or anything in between. It should default to 16, and should accept values from 3 to 100.
*   `disc_chamfer`: I'd like an option to chamfer the disc's edge rather than have a sharp edge. This should be a simple boolean yes/no option with "yes" being the default.
*   `gap_extra_diameter_in_millimeter`: The gap between the disc and the raised bearing area should be a little bit bigger than the bearing, and this setting should control how much bigger it is, defaulting to 3mm.
*   `gap_height_in_millimeter`: The height of this gap area, defaulting to 0.6mm.
*   `bearing_hole_diameter_in_millimeter`: The hole in the bearing area, defaulting to 8mm for standard 608 bearings.
*   `bearing_height_in_millimeter`: The overall height of the bearing part of the cap, defaulting to 7mm. This should be halved in the z direction.

I need the bearing section to have a hole in it so the bearing is not enclosed, with the diameter of the hole calculated as `bearing_hole_diameter_in_millimeter - 2.0`. Also the bearing hole section needs to be slightly taller to account for tolerance.

Could you generate a parameterized OpenSCAD file that implements this? I don't have any specific libraries in mind but would like to keep it as basic as possible if possible.  I'd like two copies of the cap to be displayed side-by-side in the output.

[Assistant]
customizable_fidget_spinner_cap.scad:
```
/*
 * Customizable Fidget Spinner Cap - https://www.thingiverse.com/thing:2369135
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-06-09
 * version v1.0
 *
 * This work is licensed under the Creative Commons - Attribution - Non-Commercial license.
 * https://creativecommons.org/licenses/by-nc/3.0/
*/

 // Parameter Section//
//------------------//

// This is the diameter of the cap. You may choose the diameter of the bearing. A 608 bearing has a diameter of 22mm.
disc_diameter_in_millimeter = 22.0;

// The height of the disc.
disc_height_in_millimeter = 1.3;

// Choose the number of edges. If you want a triangle, set the value to 3. Square = 4, Pentagon = 5, Hexagon = 6, ... Circle = 100.
disc_edges = 16; //[3:100]

// If you want a chamfered disc instead of a straight one, choose "yes".
disc_chamfer = "yes"; //[yes,no]

// You can set the extra diameter for the gap. The gap is located between the disc of the cap and the spinner.
gap_extra_diameter_in_millimeter = 3.0;

// The height of the gap.
gap_height_in_millimeter = 0.6;

// The hole diameter of your bearing. Default value is 8mm for a standard 608 bearing.
bearing_hole_diameter_in_millimeter = 8.0;

// The height of the bearing. Default value is 7mm for a standard 608 bearing.
bearing_height_in_millimeter = 7.0;

/* [Hidden] */
disc_d = disc_diameter_in_millimeter;
disc_h = disc_height_in_millimeter;
gap_d = bearing_hole_diameter_in_millimeter + gap_extra_diameter_in_millimeter;
gap_h = gap_height_in_millimeter;
insert_d = bearing_hole_diameter_in_millimeter;
insert_h = bearing_height_in_millimeter / 2;
insert_hole_d = bearing_hole_diameter_in_millimeter - 2.0;

 // Program Section//
//-----------------//

color("DeepSkyBlue") cap();
translate([disc_d + 4.0, 0, 0]) {
	color("DeepSkyBlue") cap();
}

 // Module Section//
//---------------//

module cap(type) {
	union() {
		if(disc_chamfer == "yes") {
			cylinder(d1 = disc_d - disc_h * 2, d2 = disc_d, h = disc_h, $fn = disc_edges);
		}
		if(disc_chamfer == "no") {
			cylinder(d = disc_d, h = disc_h, $fn = disc_edges);
		}

	    translate([0, 0, disc_h]) {
	        cylinder(d = gap_d, h = gap_h, $fn = 32);
	    }
	    translate([0, 0, disc_h + gap_h]) {
       		difference() {
       			cylinder(d = insert_d, h = insert_h, $fn = 100);
       			cylinder(d = insert_hole_d, h = insert_h * 1.9, $fn = 64);
        	}
	    }
	}
}

```