[User]
I'm looking to create a set of bingo balls, but instead of numbers, I want to use text labels. I'd like the design to be parametric so I can easily adjust things like the ball size, font size, and the number of balls. The text for the labels will vary depending on how many balls I have, using a few pre-defined sets of labels that you'll have to specify in the code. The balls should be arranged in a grid.

Here are the specifics:

*   **Ball Size:** I want to be able to set the diameter of the ball via a variable, let's call it `ball_size`.
*   **Font Size:** The font size of the text on the balls should also be variable, let's call it `font_size`.
*   **Number of Balls:**  This one's a bit more complicated. I want a variable called `number_of_balls` that takes values 0, 1, or 2. These correspond to the different sets of text labels. If `number_of_balls` is 0, then the labels should be "H", "He", "O", "C", "Ne", "Fe", "N", "Si", "Mg", and "S". If it's 1, the labels should be "H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne", "Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", and "Ca". And finally, if it's 2, then the labels should be "Al", "Ar", "Ba", "Be", "B", "Br", "Ca", "C", "Cl", "Cr", "Co", "Cu", "F", "Au", "He", "H", "I", "Fe", "Pb", "Li", "Mg", "Mn", "Hg", "Ne", "Ni", "N", "O", "P", "Pt", "Pu", "K", "Ra", "Rn", "Si", "Ag", "Na", "S", "Sn", "U", and "Zn".
*   **Grid Layout:** The balls should be arranged in a grid, and the number of rows and columns should be as close as possible to a square.
*   **Ball Design:** Each ball should be a sphere with the text label on a slightly raised area on the surface. The text should be dark (e.g., black) and the ball should have a white background.

I'd like you to use the `write/Write.scad` library from dotSCAD to handle the text on the balls. Please make sure the design is parametric so I can easily adjust these values. I assume I'll have to download that library myself.

Can you provide me with the OpenSCAD code for this?

[Assistant]
bingo_balls.scad:
```
use <write/Write.scad>
ball_size=25;
font_size=8;//[6:Small,8:Medium,10:Large]
number_of_balls=1; //[0:10,1:20,2:40]
/* [Hidden] */
texts_options=[["H","He","O","C","Ne","Fe","N","Si","Mg","S"],["H","He","Li","Be","B","C","N","O","F","Ne","Na","Mg","Al","Si","P","S","Cl","Ar","K","Ca"],["Al","Ar","Ba","Be","B","Br","Ca","C","Cl","Cr","Co","Cu","F","Au","He","H","I","Fe","Pb","Li","Mg","Mn","Hg","Ne","Ni","N","O","P","Pt","Pu","K","Ra","Rn","Si","Ag","Na","S","Sn","U","Zn"]];
texts=texts_options[number_of_balls];
number_of_rows=round(sqrt(len(texts)));

union(){
if (sqrt(len(texts))>number_of_rows){
    echo ("More columns then rows.");
    for (row=[0:number_of_rows-1]){

    translate([row*ball_size,0,0]){
    balls_per_row = number_of_rows + 1;
    echo ("Number of balls per row: ", balls_per_row);
    // Now make the build the different rows
    if (row == number_of_rows-1){
        echo ("Last row.");
        for (column = [0:len(texts)-row*balls_per_row-1]){
            translate([0,column*ball_size,0]){
                echo ("Now make ball number: ", row*balls_per_row+column);
                BingoBall(str(texts[row*balls_per_row+column]),ball_size);
            }
        }
    }else{
        for (column = [0:balls_per_row-1]){
            translate([0,column*ball_size,0]){
                echo ("Now make ball number: ", row*balls_per_row+column);
                BingoBall(texts[row*balls_per_row+column],ball_size);
            }
        }
    }
}
}
}else{
    echo ("Equal number of rows and columns.");
    for (row=[0:number_of_rows-1]){

    translate([row*ball_size,0,0]){
    balls_per_row = round(sqrt(len(texts)));
    echo ("Number of balls per row: ", balls_per_row);
    if (row == number_of_rows-1){
        echo ("Last row.");
        if (sqrt(len(texts))==balls_per_row){
             for (column = [0:balls_per_row-1]){
                translate([0,column*ball_size,0]){
                    echo ("Now make ball number: ", row*balls_per_row+column);
                    BingoBall(texts[row*balls_per_row+column],ball_size);
                }
            }
        }else{
            for (column = [0:len(texts)-row*balls_per_row-1]){
                translate([0,column*ball_size,0]){
                    echo ("Now make ball number: ", row*balls_per_row+column);
                    BingoBall(texts[row*balls_per_row+column],ball_size);
                }
            }
        }
    }else{
        for (column = [0:balls_per_row-1]){
            translate([0,column*ball_size,0]){
                echo ("Now make ball number: ", row*balls_per_row+column);
                BingoBall(texts[row*balls_per_row+column],ball_size);
            }
        }
    }
}
}
}
}
module BingoBall(my_txt, ball_size){
    rotate([35,0,0]){
        rotate([-90,0,0]){
            color("black") writesphere(text=my_txt,where=[0,0,0],radius=ball_size/2.2,t=ball_size/(ball_size-(ball_size/1.95)),h=ball_size/5);
        }
        union(){
            difference(){
                sphere(r=ball_size/2, $fn=70);
                translate([0,0,ball_size/2]){
                    rotate([180,0,0]){
                        difference(){
                            cylinder(ball_size/2,ball_size/2.2,00, $fn=35);
                            translate([0,0,-ball_size*0.01]){
                                difference(){
                                    cylinder(ball_size/2,ball_size/4,ball_size/2, $fn=35);
                                    translate([0,0,-ball_size*0.01]){
                                        cylinder(ball_size/2.4,ball_size/2.4,ball_size/40,$fn=50);
                                    }
                                }
                            }
                        }
                    }
                }
            }
            color("white") sphere(ball_size/2/1.05, $fn=70);
        }

    }
}

```


[User]
I'm looking to design a set of jigs for accurately cutting the rods for a delta 3D printer. I need a miter jig that will work with 2020 aluminum extrusion and allow me to specify the desired length of the rods, as well as the length of the rod ends that connect the rods to the effector and carriages.

The jig needs to have two main parts: a "mounting bracket" that attaches to the extrusion and provides a reference point, and a "cutting bracket" that also mounts to the extrusion, and provides a channel to guide a saw blade for cutting the rod. The design should include the following parameters:

*   `holeCreationOffset`: A small offset to make holes slightly larger for clean punching (e.g., 0.05mm).
*   `printerTipWidth`: The width of the printer nozzle for related calculations (e.g., 0.48mm).
*   `desiredRodLength`: The desired finished length of the delta rods (e.g., 269mm).
*   `rodDiameter`: The diameter of the rods being used (e.g., 4.65mm).
*  `rodEndsLength`: The length of the end pieces that connect to the rods (e.g., 24.5mm).
*   `bladeWidth`: The width of the saw blade for a snug fit in the cutting channel (e.g., 0.75mm).
*   `mountingholeDiameter`: The diameter of the mounting holes on the brackets (e.g., 3.5mm + `printerTipWidth`/2).
*   `mountingBracketWidth`: The width of the mounting bracket, meant to match the extrusion width (e.g., 20mm).
*  `mountingBracketHeight`: The length of the mounting bracket along the extrusion (e.g., 40mm).
*   `mountingBracketThickness`: The thickness of the mounting bracket (e.g., 3mm).
*   `cuttingBracketWidth`: The width of the cutting bracket (e.g., 20mm).
*   `cuttingBracketHeight`: The length of the cutting bracket along the extrusion (e.g., 40mm).
*   `cuttingBracketThickness`: The thickness of the cutting bracket (e.g., 3mm).

The mounting and cutting brackets should both have a similar shape: A rectangular base with rounded corners, and a rectangular protrusion on one side with a centered channel for the blade. There should be two mounting holes on the brackets, and also a hole to hold a rod in place for measurement.

The design should output a calculation of the `cutRodLength` which should be `desiredRodLength - (mountingBracketHeight/2) - ((cuttingBracketHeight/2) - bladeWidth) - (rodEndsLength *2)`.

I'd like to be able to adjust these values and have the model reflect the changes. It would be great if you could make the model parametric using OpenSCAD. I'm not using any specific external libraries so you don't need to worry about those. Could you generate the necessary .scad files for me?

[Assistant]
delta_rods_miter.scad:
```
//The entire system here uses MM in sizes,
//This is used to make the holes slightly larger to allow for clean hole punches.
holeCreationOffset=0.05;
// How wide you printer nozzle is
printerTipWidth=0.48;
//How long you want your rods to be, this is for the measurement guidance
desiredRodLength=269; //38
// The diameter of the rods you are using for the Delta Rods
rodDiameter=4.65;
// How long the end piece is that connects to the rods and the effector
rodEndsLength=24.5;
// How wide your saw blade is, this should roughly be the thickness of the blade. This allows the blade to bee held snugly in the mitre channel.
bladeWidth=0.75;
// The diameter of the holes that are used for mounting
mountingholeDiameter=3.5 + (printerTipWidth/2);
// How wide the bracket is, should be the width of the extrusion
mountingBracketWidth=20;
// how long the bracket is on the extrusion, this should roughly be 2 x the width of the extrusion
mountingBracketHeight=40;
//how thick the mounting bracket is
mountingBracketThickness=3;
// How wide the bracket is, should be the width of the extrusion
cuttingBracketWidth=20;
// how long the bracket is on the extrusion, this should roughly be 2 x the width of the extrusion
cuttingBracketHeight=40;
// How wide the bracket is, should be the width of the extrusion
cuttingBracketThickness=3;
partoffset=(mountingBracketWidth + mountingBracketWidth) /2;
mountingholeRadius=mountingholeDiameter/2;
rodRadius=(printerTipWidth + rodDiameter) / 2;
//Forumla to create the rod length information
cutRodLength=desiredRodLength - (mountingBracketHeight/2) - ((cuttingBracketHeight/2) - bladeWidth) - (rodEndsLength *2);

module cylinder_outer(height,radius,fn){
   fudge = 1/cos(180/fn);
   cylinder(h=height,r=radius*fudge,$fn=fn, center = true);
}

module cylinder_outerdual(height,radius,radiustwo,fn){
   fudge = 1/cos(180/fn);
   cylinder(h=height,r1=radius*fudge,r2=radiustwo*fudge,$fn=fn, center = true);
}

module cylinder_mid(height,radius,fn){
   fudge = (1+1/cos(180/fn))/2;
   cylinder(h=height,r=radius*fudge,$fn=fn, center = true);
}

module createMeniscus(h,radius) {// This module creates the shape that needs to be substracted from a cube to make its corners rounded.
    difference(){        //This shape is basicly the difference between a quarter of cylinder and a cube
       translate([radius/2+0.1,radius/2+0.1,0]){
          cube([radius+0.2,radius+0.1,h+0.2],center=true);         // All that 0.x numbers are to avoid "ghost boundaries" when substracting
       }

       cylinder(h=h+0.2,r=radius,$fn = 25,center=true);
    }
}

module roundCornersCube(x,y,z,r){  // Now we just substract the shape we have created in the four corners
    difference(){
       cube([x,y,z], center=true);

    translate([x/2-r,y/2-r]){  // We move to the first corner (x,y)
          rotate(0){
             createMeniscus(z,r); // And substract the meniscus
          }
       }
       translate([-x/2+r,y/2-r]){ // To the second corner (-x,y)
          rotate(90){
             createMeniscus(z,r); // But this t�ime we have to rotate the meniscus 90 deg
          }
       }
          translate([-x/2+r,-y/2+r]){ // ...
          rotate(180){
             createMeniscus(z,r);
          }
       }
          translate([x/2-r,-y/2+r]){
          rotate(270){
             createMeniscus(z,r);
          }
       }
    }
}

module deltaRodTemplate(){
    cuttingBracket();
    mountingBracket();
    echo("Mount the mounting bracket and then measure this far to mount the cutting bracket" );
    echo(cutRodLength);

}

module mountingBracket(){
    difference(){
        union(){
            translate([0,0,0]) roundCornersCube(mountingBracketWidth,mountingBracketHeight,mountingBracketThickness,3);
            difference(){
                translate([0,0,cuttingBracketWidth/4 + mountingBracketThickness/2]) roundCornersCube(cuttingBracketWidth,cuttingBracketWidth/2,cuttingBracketWidth/2,3);
                translate([0,bladeWidth/2,cuttingBracketWidth/2]) roundCornersCube(cuttingBracketWidth + holeCreationOffset,bladeWidth+holeCreationOffset,cuttingBracketWidth + holeCreationOffset,0);

            }
        }
        translate([0,mountingBracketHeight/4,0]) cylinder_mid(50,mountingholeRadius,360);
        translate([0,-mountingBracketHeight/4,0]) cylinder_mid(50,mountingholeRadius,360);
        translate([0,mountingBracketWidth/4,rodDiameter*1.5]) rotate(a=[90,0,0]) cylinder_mid(cuttingBracketWidth/2,rodRadius,360);
    }

}

module cuttingBracket(){
    difference(){
        union(){
            translate([-partoffset * 1.1,0,0]) roundCornersCube(cuttingBracketWidth,cuttingBracketHeight,cuttingBracketThickness,3);
            difference(){
                translate([-partoffset * 1.1,0,cuttingBracketWidth/4 + cuttingBracketThickness/2]) roundCornersCube(cuttingBracketWidth,cuttingBracketWidth/2,cuttingBracketWidth/2,3);
                translate([-partoffset * 1.1,0,cuttingBracketWidth/2]) roundCornersCube(cuttingBracketWidth + holeCreationOffset,bladeWidth+holeCreationOffset + holeCreationOffset,cuttingBracketWidth + holeCreationOffset,0);

            }
        }
        translate([-partoffset * 1.1,cuttingBracketHeight/4,0]) cylinder_mid(50,mountingholeRadius,360);
        translate([-partoffset * 1.1,-cuttingBracketHeight/4,0]) cylinder_mid(50,mountingholeRadius,360);
        translate([-partoffset * 1.1,0,rodDiameter*1.5]) rotate(a=[90,0,0]) cylinder_mid(50,rodRadius,360);

    }

}

deltaRodTemplate();
```


[User]
I'd like to design a quick release mechanism in OpenSCAD, similar to the one used with Velbon QB-4W camera plates, but I want it to be parametric so I can easily adjust the dimensions. The idea is to have a base that the camera plate slides into and a knob that tightens to hold it in place.

Here's a breakdown of what I need:

**Base/Body:**
*   It should have a main, roughly rectangular body with a slot for the plate to slide into.
*   The bottom of the body should be flat.
*   The slot should have a tapered profile, wider at the bottom and narrower at the top to match the plate.
*   There should be a circular cutout on one side of the body where the tightening knob is located.
*   There should be a circular hole going through the center of the circular cutout for the bolt.
*   There should be a cutout on the back that extends all the way through the body, likely for manufacturing.

**Knob:**
*   The knob should have a shape that allows for easy gripping and turning. I'm thinking a sort of rounded triangular shape for the main part, with a smaller, cylindrical base.
*   The knob should have a hole in the middle for the screw.
*   The knob should have a cavity where the end of the screw fits to provide the tightening action.
*   I want the knob to have an angled face.

**Key Parameters:**

*   `base_width`: The width of the base of the plate. (I need to be able to change this)
*   `top_width`: The width of the top of the plate (where it sits in the slot).
*   `height`: The height of the plate.
*   `body_height`: Overall height of the body including the slot, and the extra space where the knob lives.
*   `knob_offset`: Distance of the knob from the central body.
*   `screw_diameter`: Diameter of the screw hole.
*  `screw_head_diameter`: Diameter of the space for the screw head, should also be a hexagonal shape.
*  `screw_head_depth`: Depth of space for the screw head.

For a starting point, I would like:
`base_width` = 43.5
`top_width` = 35.5
`height` = 9
`body_height` = `height` + 8
`knob_offset` = `base_width` - 8.5
`screw_diameter` = 6
`screw_head_diameter` = 11.5
`screw_head_depth` = 6.5

I'm not really sure how to do the tapered slot. If you can take care of the rounded edges on the main body as well, that'd be great. Also, I am aware that I'll need to rotate the knob for it to fit correctly when printing, so please don't worry about trying to get that correct in the CAD itself. I would prefer that all of the modules live in a single `.scad` file.

I'm happy to provide more details or clarifications as needed.

[Assistant]
quick_release.scad:
```

BASE=43.5;
TOP=35.5;
HEIGHT=9;

$fn = 100;

module quick_release_body(base=BASE, top=TOP, height=HEIGHT) {
  width = base + 6.5;
  depth = base + 6.5;
  body_height = height + 8;
  knob_offset = base - 8.5;
  color("orange") difference() {
    union() {
      translate([width/-2, depth/-2, 0]) rounded_cube(size=[width, depth, body_height], flat_bottom=true);
      translate([0,knob_offset, 0]) cylinder(r=10,h=body_height);
      translate([-10,14.5, 0]) cube(size=[20,20,body_height]);
    }
    translate([0,depth/-2+5, body_height - height + 0.5]) headspace(base, top, height);
    translate([0,knob_offset, -1]) cylinder(h=body_height+2, r=3);
    translate([0,knob_offset, -1]) cylinder(h=6.5, r=5.75, $fn=6);
  }
}

module knob(base=BASE, top=TOP, height=HEIGHT) {
  color("purple") difference() {
    union() {
      intersection() {
        hull() {
          cylinder(h=0.05, r=9.5);
          translate([0,1,height-1]) cylinder(h=0.05, r=base-top+7);
        }
        translate([0,7,0]) cylinder(h=20, r=15);
      }
      rotate([0,0,-14]) translate([-30, -2.5, 0]) rounded_cube(size=[30,5,8], r=2, flat_bottom=false);
    }
    translate([0,0,2.5]) cylinder(h=6, r=5);
    translate([0,0,-1]) cylinder(h=15, r=3);
  }
}

module headspace(base, top, height) {
  offset = sqrt(pow(base-top,2) + pow(height,2))/2;
  translate([base/-2,20,0]) cube(size = [base,base*2, height]);
  translate([base/-2,0,0]) hull() {
     translate([0,offset,0]) cube(size = [base,base, height*2/3]);
     translate([2,offset,height*2/3]) cube(size = [base-4,base, height/3]);
     translate([0,0,0]) cube(size = [base,base, 0.5]);
  }
}

module rounded_cube(size=[50,50,50], r=2.5, flat_bottom=false, $fn=$fn) {
  y_offset = flat_bottom ? r : 0;
  difference() {
    translate([r,r,r]) hull () {
      translate([0,0,-y_offset]) sphere(r=r);
      translate([size[0]-r*2, 0, -y_offset]) sphere(r=r);
      translate([size[0]-r*2, size[1]-r*2, -y_offset]) sphere(r=r);
      translate([size[0]-r*2, size[1]-r*2, size[2]-r*2]) sphere(r=r);
      translate([0, size[1]-r*2, size[2]-r*2]) sphere(r=r);
      translate([0, 0, size[2]-r*2]) sphere(r=r);
      translate([size[0]-r*2, 0, size[2]-r*2]) sphere(r=r);
      translate([0, size[1]-r*2, -y_offset]) sphere(r=r);
    }
    if (flat_bottom) {
      translate([0,0,-r-1]) cube(size=[size[0], size[1], r+1]);
    }
  }
}

print = false;

if (print) {
  quick_release_body();
  translate([0,-35,8.05]) rotate([180,0,0]) knob();
} else {
  translate([0,BASE - 8.5,HEIGHT-0.5]) rotate([0,0,180]) knob();
  quick_release_body();
}
```


[User]
Hi there! I'm looking to create a parametric model of a tactile switch in OpenSCAD, and I'd like your help with the design.

I've been using a part based on the CTS 222A switch, but I want something more flexible and customizable. I need it to be parametric, meaning I can adjust things like the base dimensions, button size, and mounting hole locations, etc. Ideally, I'd like to be able to easily toggle between a centered version where the switch volume is centered on the origin, and a non-centered version with the bottom of the base at the origin. I would also like the option to add a thin "spear" centered on the switch for use in locating it in other parts. I'd like to avoid relying on any external libraries, and it's fine if the resulting code is split into multiple files, so long as they work well together.

Specifically, here are the parameters I need to control:

*   **Base Dimensions:** X, Y, and Z dimensions of the rectangular base of the switch.
*   **Button Diameter:** The diameter of the cylindrical button.
*   **Button Height:** The total height of the cylindrical button.
*   **Button Standoff Height:** The height of the standoff cylinder above the base.
*   **Standoff Diameter:** The diameter of the standoff cylinder.
*   **Center:** A boolean flag to center the model on the origin (true) or have the base at the origin (false).
*   **Locate:** A boolean flag to add a thin "spear" at the center for alignment.

I'd also like the design to include some helper examples, showing how to position and use this switch model in a larger design using `translate()`, like the example I have for my current version.

Could you provide me with an OpenSCAD design that meets these requirements, perhaps split into multiple files, that allows for a highly configurable tactile switch? The existing code is included above for reference, but feel free to make any improvements you think are helpful - just don't rely on libraries. Thanks!

[Assistant]
tactile_switch.scad:
```
/*
  Through hole tactile switch based on CTS 222A tactile switch
  http://www.mouser.com/ds/2/96/222A-531986.pdf

  Aaron Ciuffo (txoof)

  23 December 2015

  Released under GPL V3

  TODO:
    * add vertical and horizontal mount variants
    * add legs

*/

/* [Switch Dimensions] */
switchBase = [6.2, 6.2, 3.3]; // X, Y, Z dimensions of base
switchButtonDia = 3.5; // button diameter
switchButtonZ = 4.3; // total height of button
buttonStandoffZ = 0.5; // standoffs above the height of the base
buttonStandoffX = 4.6; // diameter of standoffs

/* [options] */
// center around the volume of the base, or place at the positive origin
center = false; // [true,false]

// add "spear" to make locating easier
locate = false; // [true,false]

module tactileSwitch(locate = false, center = false) {
  $fn = 36;
  // center around the volume of the base or move so base sits at origin
  trans = center == false ? [0, 0, switchBase[2]/2] : [0, 0, 0];

  translate(trans) // move the object to the location set above
  union() {
    color("darkslategray")
      cube(switchBase, center = true);
    translate([0, 0, switchBase[2]/2])
      color("darkgray")
      cylinder(r = switchButtonDia/2, h = switchButtonZ, center = true);
    translate([0, 0, buttonStandoffZ/2])
      color("silver")
      cylinder(r = buttonStandoffX/2, h = switchBase[2] + buttonStandoffZ, center = true);
    if(locate) {
      color("red")
      cylinder(h = switchButtonZ* 20, r = .1, center = true);
    }
  }

}

tactileSwitch(locate = locate, center = center);

```


[User]
I'm looking to design a parametric microswitch for use in my OpenSCAD projects. I've seen some existing designs, but I need one that I can fully customize. Here's what I'm thinking:

**General Structure:**

I need a main body with mounting holes, terminals for electrical connections, and an arm with an optional roller. The whole thing should be easily configurable via parameters so I can adapt it to different applications. I don't want to rely on any external libraries, so everything should be defined within the SCAD file(s) themselves. I don't need to worry about the electrical properties, just the physical dimensions.

**Specific Parameters (and Defaults):**

*   **Body:**
    *   `bX`: Body X dimension (default: 20mm)
    *   `bY`: Body Y dimension (default: 6.1mm)
    *   `bZ`: Body Z dimension (default: 10mm)
    *   `hD`: Mounting hole diameter (default: 2.5mm)
    *   `holeFromBottom`: Distance of mounting hole from the bottom of the body (default: 1.8mm)
    *   `holeFromEdge`: Distance of mounting hole from the edge of the body (default: 4.3mm)

*   **Terminals:**
    *   `tX`: Terminal X dimension (default: 0.6mm)
    *   `tY`: Terminal Y dimension (default: 3.3mm)
    *   `tZ`: Terminal Z dimension (default: 4mm)
    *   `termFromEdge`: Distance of terminals from the edge of the body (default: 1.5mm)

*   **Switch Arm:**
    *   `aX`: Arm X dimension (default: 18.5mm)
    *   `aY`: Arm Y dimension (default: 4mm)
    *   `aZ`: Arm Z dimension (default: 0.3mm)
    *   `armFromEdge`: Distance of arm from the edge of the body (default: 3mm)
    *    `rollerOverArm`: Distance of the roller over the arm (default: 1mm)
    *   `armOverBody`: Distance of arm above the top of the body (default: 4mm)
    *   `addRoller`: Boolean to add a roller (default: 1, true)
    *   `rollerD`: Roller diameter (default: 4mm)

**Modules:**

I'm thinking the design should be broken into modules like this:
    *   `body()`: Creates the main body with mounting holes.
    *   `arm()`: Creates the switch arm with optional roller.
    *   `terminals()`: Creates the electrical terminals.
    *   `micro_switch()`: Assembles all the modules together.

**Other Requirements:**
*  The modules should be positioned using parameters to be easily modified.
*  Hole positions are relative to the center.
*  The switch arm should be angled slightly upwards.
* The mounting holes should be cylindrical.

I'd like for all of the modules to be positioned by their centers.

Could you generate the OpenSCAD code for this? Thanks!

[Assistant]
micro_switch.scad:
```
/*
  Micro switch with roller

  Aaron Ciuffo (txoof)
  23 December 2015

*/
$fn=36; //curve refinement

/*[body]*/
// body X
bX=20;
// body Y
bY=6.1;
// body Z
bZ=10;
// hole diameter
hD=2.5;
holeFromBottom=1.8; //absolute distance of mounting hole from bottom of switch
holeFromEdge=4.3; //absolute distance of mounting hole from edge

/*[terminals]*/
// terminal X dimension
tX=.6;
// terminal Y dimension
tY=3.3;
// terminal Z dimension
tZ=4;
// position from edge
termFromEdge=1.5;

/*[switch arm]*/
//arm X
aX=18.5;
// arm Y
aY=4;
// arm Z
aZ=.3;
 //absolute distance of arm from edge
armFromEdge=3;
//absolute distance of roller over the arm
rollerOverArm=1;
//distance of arm over body
armOverBody=4;
// add a roller
addRoller=1; //[0:1]
// roller diameter
rollerD=4;

/*[Hidden]*/
hR=hD/2;
echo(hR);
hZ=bZ/2-hR-holeFromBottom; //place the hole
hX=bX/2-hR-holeFromEdge;
//hY=bX/2-hR-holeFromEdge;
rollerR=rollerD/2;
armAngle=asin(armOverBody/aX/2);

module body() {
  difference() {
    color("gray")
      cube([bX, bY, bZ], center=true);
    rotate([90, 0, 0])
      translate([hX, -hZ, 0])
      cylinder(r=hR, h=bY*1.5, center=true);
    rotate([90, 0, 0])
      translate([-hX, -hZ, 0])
        cylinder(r=hR, h=bY*1.5, center=true);
  }
}

module arm() {
  color("silver")
  union() {
    rotate([])
      cube([aX, aY, aZ], center=true);
    if (addRoller==1) {
      translate([aX/2-rollerR, 0, rollerR+rollerOverArm])
        rotate([90, 0, 0])
        cylinder(h=aY, r=rollerR, center=true);
      translate([aX/2-rollerR, 0, rollerR/2])
        cube([rollerD, rollerD, rollerR], center=true);
    }

  }
}

module terminals() {
  translate([0, 0, -bZ/2-tZ/2])
    cube([tX, tY, tZ], center=true);
  translate([bX/2-tX/2-termFromEdge, 0, -bZ/2-tZ/2])
    cube([tX, tY, tZ], center=true);
  translate([-1*(bX/2-tX/2-termFromEdge), 0, -bZ/2-tZ/2])
    cube([tX, tY, tZ], center=true);
}

module micro_switch() {
  //center on holes
  translate([0, 0, hZ])
  union() {
    body();
    translate([armFromEdge/2, 0, bZ/2+armOverBody/4])
      rotate([0, -armAngle, 0])
      arm();
    color("silver")
      terminals();
  }
}

micro_switch();

```


[User]
Hey, I'm looking to create a parametric library of metric fasteners for use in OpenSCAD. I've seen a few out there, but they are either missing some important features or seem buggy, so I'm hoping you can help me create a robust solution from the ground up.

Specifically, I need the following:

1.  **Metric Bolt Generation:**
    *   Support for M2, M3, M4, M6, M8, M10, and M12 sizes.
    *   Two style options: Socket head (hex socket drive) and standard Hex head.
    *   Parametric control for bolt length.
    *   A way to center the shaft (excluding the head) or not, which is a boolean setting.
    *   A tolerance parameter that can add or subtract from the shaft diameter for fit.
2.  **Metric Nut Generation:**
    *   Corresponding nuts for all the listed M sizes.
    *   Parametric control for centering the nut in the same way as bolts (boolean option).
    *   A tolerance parameter that can add or subtract from the hole and body diameter.
3.  **Metric Washer Generation:**
    *   Corresponding washers for all the listed M sizes.
    *   A tolerance parameter for the inner and outer diameters.
4.  **T-Slot Generation for Laser Cut Parts:**
    *   This should create a T-shaped slot for laser-cut parts that will hold a nut perpendicular to the material.
    *   Parametric control for the target M size of the bolt/nut.
    *   Parameter for the material thickness.
    *   Parameter for the total length of the bolt that is to be used.
    *   A tolerance parameter for the bolt size, that adds additional spacing around the nut.
    *   Ideally, it would be good if there was an option to add a circular relief cut to the edges of the T-slot to prevent cracking in acrylic.

I think it would be great to use named parameters, making the different parts easy to generate and understand, and maybe a demo function that shows all the parts at the different sizes. I'd also like to include a way to specify the bolt size and length via a customizer, so I can test the designs via the customizer menu, using a drop-down.

I don't expect you to include any code libraries with this, but I'm definitely hoping for a parametric approach. It doesn't matter to me if it's one big .scad file, or many smaller files that are brought together with `include` or `use`, so long as it's well-organized. Thank you for your help.

[Assistant]
nuts_and_bolts.scad:
```
/*
  Aaron Ciuffo
  Released under GPL V3

  Metric nut and bolt sizes based on
  http://www.roymech.co.uk/Useful_Tables/Screws/Hex_Screws.htm
  http://www.numberfactory.com/nf%20metric%20screws%20and%20bolts.htm
  http://www.csgnetwork.com/screwsochdcaptable.html

  NOTE: OpenSCAD 2015.03-2 crashes *HARD* if the called m bolt size does not exist due
  to a bug in the lookup() function. A bug report has been filed and should be fixed
  in the next release:
  https://github.com/openscad/openscad/issues/1528

  TODO:
  * Add circular releif cuts in corners of tSlot to prevent cracking in acrylic

  Usage:
  mBolt(
    size = mX, // defined m bolt size (default: m3)
    len = N, // length of bolt shaft (default: 10)
    center = true/false, // center the shaft (not including the head) (default: true)
    style = "socket"/"hex" // default is socket drive (default: socket)
    tolerance = N // positve or negative number to add to the shaft diameter (def: 0)
  );

  mNut(
    size = mX, // defined m bolt size (default: m3)
    center = true/false // center the nut (default: true)
    tolerance = N // positive or negative number to add to the hole and body diameter
  );

  mWasher(
    size = mX, // defined m bolt size (default: m3)
    tolerance = N // positive or negative number to add to the inner and outer diameter
  );

  This module creates a t-shaped slot for making perpendicular joints in laser cut
  objects. By default the bolt slot is 0.5mm larger than the distance across the
  nut FLATS. This shold make it easy to slot in a nut, but it should not be able
  to spin to make tightening easier.

  tSlot(
    size = mX, // defined m bolt size (default: m3)
    material = N, // thickness of material in mm (default: 3)
    len = N, // total length of bolt to be used (default: 15)
    tolerence = N // positive or negative number to add to the bolt size (def 0.5)
  );

*/

/*
  Add additional M sizes in the section below
  Fastner Dimensions:
  mX = [
    [boltDia, D], // D = bolt shaft diameter
    [headHexThick, T], // T = thickness of head
    [boltNut, N], // N = width across flats, wrench size for bolt head or nut
    [boltNutMax, M], // M = maximum width of bolt head or nut
    [nutThick, Q] // Q = nutThickness
    [washerDia, W], // W = external diameter of washer
    [washerThick, E] // E = washer thickness
    [socketHeadThick, H], // H = thickness of hex socket head
    [socketDia, S], // S = diameter hex socket head
    [socketSize, Z] // Z = socket wrench size
  ];

  BLANK

  mX = [
    [boltDia, ],
    [headHexThick, ],
    [boltNut, ],
    [boltNutMax, ],
    [nutThick, ],
    [washerDia, ],
    [washerThick, ],
    [socketHeadThick, ],
    [socketDia, ],
    [socketSize, ]
  ];
*/

/* [Hidden] */
// This is a bit of an abuse of the lookup() function; the temporary values
// need to be the *actual* values used in at least one of the defined sets
// values for lookup function
boltDia =  3;
headHexThick = 2;
boltNut = 5.5;
boltNutMax = 6.4;
nutThick = 2.4;
washerDia = 7;
washerThick = 0.5;
socketHeadThick = 3;
socketDia = 5.5;
socketSize = 2.5;

// Meric Fastner Sizes
m2 = [
  [boltDia, 2],
  [headHexThick, 2],
  [boltNut, 4],
  [boltNutMax, 4.6],
  [nutThick, 1.2],
  [washerDia, 5.5],
  [washerThick, 0.3],
  [socketHeadThick, 2],
  [socketDia, 3.5],
  [socketSize, 1.5]
];

m3 = [
  [boltDia, 3],
  [headHexThick, 2],
  [boltNut, 5.5],
  [boltNutMax, 6.4],
  [nutThick, 2.4],
  [washerDia, 7],
  [washerThick, 0.5],
  [socketHeadThick, 3],
  [socketDia, 5.5],
  [socketSize, 2.5]
];

m4 = [
  [boltDia, 4],
  [headHexThick, 4],
  [boltNut, 7],
  [boltNutMax, 8.1],
  [nutThick, 3.2],
  [washerDia, 9],
  [washerThick, 0.8],
  [socketHeadThick, 4],
  [socketDia, 7],
  [socketSize, 3]
];

m6 = [
  [boltDia, 6],
  [headHexThick, 4],
  [boltNut, 10],
  [boltNutMax, 11.5],
  [nutThick, 5],
  [washerDia, 12],
  [washerThick, 1.6],
  [socketHeadThick, 6],
  [socketDia, 10],
  [socketSize, 5]
];

m8 = [
  [boltDia, 8],
  [headHexThick, 5.5],
  [boltNut, 13],
  [boltNutMax, 15],
  [nutThick, 6.5],
  [washerDia, 17],
  [washerThick, 2],
  [socketHeadThick, 8],
  [socketDia, 13],
  [socketSize, 6]
];

m10 = [
  [boltDia, 10],
  [headHexThick, 7],
  [boltNut, 17],
  [boltNutMax, 19.6],
  [nutThick, 8],
  [washerDia, 21],
  [washerThick, 2],
  [socketHeadThick, ],
  [socketDia, 16],
  [socketSize, 8]
];

m12 = [
  [boltDia, 12],
  [headHexThick, 8],
  [boltNut, 19],
  [boltNutMax, 22.1],
  [nutThick, 9.5],
  [washerDia, 24],
  [washerThick, 2.5],
  [socketHeadThick, 12],
  [socketDia, 18],
  [socketSize, 10]
];

types = [m2, m3, m4, m6, m8, m10, m12];

/* [Customize] */
//Type of M series fastner
typeMeta = 1; //[0:m2,1:m3,2:m4,3:m6,4:m8,5:m10,6:m12]
// Length of Bolt
customizerLen = 10; //[1:40]

/*[Hidden]*/
customizerType = types[typeMeta];

echo (typeMeta, customizerType);

module mNut(size = m3, center = true, tolerance = 0) {
  fastnerType = size;
  t = tolerance;

  // lookup values
  boltDiaL = lookup(boltDia, fastnerType);
  headHexThickL = lookup(headHexThick, fastnerType);
  boltNutL = lookup(boltNut, fastnerType);
  boltNutMaxL = lookup(boltNutMax, fastnerType);
  nutThickL = lookup(nutThick, fastnerType);
  washerDiaL = lookup(washerDia, fastnerType);
  washerThickL = lookup(washerThick, fastnerType);
  socketHeadThickL = lookup(socketHeadThick, fastnerType);
  socketDiaL = lookup(socketDia, fastnerType);
  socketSizeL = lookup(socketSize, fastnerType);

  echo ("type M", boltDiaL);
  difference() {
    cylinder(center = center, r = boltNutMaxL/2 + t/2, h = nutThickL + t , $fn = 6);
    cylinder(center = true, r = boltDiaL/2 + t/2, h = nutThickL*3, $fn = 72);

  echo ("nut thickness:", nutThickL+t);
  }
}

//mNut();

module mBolt(size = m3, len = 10, center = true, style = "socket", tolerance = 0) {
  fastnerType = size;
  t = tolerance;

  // lookup values
  boltDiaL = lookup(boltDia, fastnerType);
  headHexThickL = lookup(headHexThick, fastnerType);
  boltNutL = lookup(boltNut, fastnerType);
  boltNutMaxL = lookup(boltNutMax, fastnerType);
  nutThickL = lookup(nutThick, fastnerType);
  washerDiaL = lookup(washerDia, fastnerType);
  washerThickL = lookup(washerThick, fastnerType);
  socketHeadThickL = lookup(socketHeadThick, fastnerType);
  socketDiaL = lookup(socketDia, fastnerType);
  socketSizeL = lookup(socketSize, fastnerType);

  echo ("type M", boltDiaL);
  $fn = 72;
  socketRad = (socketSizeL/2)/sin(60); // socket hole diameter
  headRad = boltNutMaxL/2;

  centerTranslate = center == true ? len/2 : len;

  union() {
    cylinder(r = boltDiaL/2 + t, h = len, center = center );

    if (style == "socket") {
      translate([0, 0, centerTranslate+socketHeadThickL/2])
        difference() {
          cylinder(r = socketDiaL/2, h = socketHeadThickL, center = true);
          translate([0, 0, socketHeadThickL/2 - socketHeadThickL*.74/2])
            cylinder(r = socketRad, h = socketHeadThickL*.75, center = true, $fn = 6);
        }

      echo ("total length:", len + socketHeadThickL);
      echo ("head thickness:", socketHeadThickL);
      echo ("bolt length:", len);
    }

    if (style == "hex") {
      //translate([0, 0, len/2+headHexThickL/2])
      translate([0, 0, centerTranslate+headHexThickL/2])
        cylinder(h = headHexThickL, r = headRad, center = true, $fn = 6);

      echo ("total length:", len + headHexThickL + t);
      echo ("head thickness:", headHexThickL);
      echo ("bolt length:", len);

    }
  }

}

module mWasher(size = m3, tolerance = 0) {
  fastnerType = size;
  t = tolerance;

  // lookup values
  boltDiaL = lookup(boltDia, fastnerType);
  headHexThickL = lookup(headHexThick, fastnerType);
  boltNutL = lookup(boltNut, fastnerType);
  boltNutMaxL = lookup(boltNutMax, fastnerType);
  nutThickL = lookup(nutThick, fastnerType);
  washerDiaL = lookup(washerDia, fastnerType);
  washerThickL = lookup(washerThick, fastnerType);
  socketHeadThickL = lookup(socketHeadThick, fastnerType);
  socketDiaL = lookup(socketDia, fastnerType);
  socketSizeL = lookup(socketSize, fastnerType);

  difference() {
    cylinder(r = washerDiaL/2+t/2, h = washerThickL+t, center = true, $fn = 36);
    cylinder(r = boltDiaL/2+t/2, h = washerThickL*3, center = true, $fn = 36);
  }

}

module tSlot(size = m3, material = 3, bolt = 15, tolerance = 0.5) {
  fastnerType = size;
  t = tolerance;
  // lookup values
  boltDiaL = lookup(boltDia, fastnerType);
  headHexThickL = lookup(headHexThick, fastnerType);
  boltNutL = lookup(boltNut, fastnerType);
  boltNutMaxL = lookup(boltNutMax, fastnerType);
  nutThickL = lookup(nutThick, fastnerType);
  washerDiaL = lookup(washerDia, fastnerType);
  washerThickL = lookup(washerThick, fastnerType);
  socketHeadThickL = lookup(socketHeadThick, fastnerType);
  socketDiaL = lookup(socketDia, fastnerType);
  socketSizeL = lookup(socketSize, fastnerType);

  boltSlot = bolt + t - material; // length of nut slot - material + tolerence
  nutTh = nutThickL + t; // thickness of nut + tolerence

  cube([boltNutL+t, nutTh, material*2], center = true);
  translate([0, (boltSlot)/2-nutTh, 0])
    cube([boltDiaL+t, boltSlot, material*2], center=true);
  echo("tslot total length:", boltSlot);
  echo("length above bolt:" , boltSlot-nutTh);
}

module demo() {
  for (i = types) {
    fastnerType = i;
    boltDiaL = lookup(boltDia, fastnerType);
    headHexThickL = lookup(headHexThick, fastnerType);
    boltNutL = lookup(boltNut, fastnerType);
    boltNutMaxL = lookup(boltNutMax, fastnerType);
    nutThickL = lookup(nutThick, fastnerType);
    washerDiaL = lookup(washerDia, fastnerType);
    washerThickL = lookup(washerThick, fastnerType);
    socketHeadThickL = lookup(socketHeadThick, fastnerType);
    socketDiaL = lookup(socketDia, fastnerType);
    socketSizeL = lookup(socketSize, fastnerType);

    translate([0, socketDiaL*10-40, 0])
      color("red")
      mBolt(i, len = washerDiaL);
    translate([30, socketDiaL*10-40, 0])
      color("orange")
      mBolt(i, style = "hex", len = washerDiaL);
    translate([60, socketDiaL*10-40, 0])
      color("yellow")
      mNut(i);
    translate([90, socketDiaL*10-40, 0])
      color("green")
      mWasher(i);
    translate([120, 25, 0])
      tSlotDemo();
  }
}

module simpleDemo() {
  fastnerType = customizerType;
  boltDiaL = lookup(boltDia, fastnerType);
  headHexThickL = lookup(headHexThick, fastnerType);
  boltNutL = lookup(boltNut, fastnerType);
  boltNutMaxL = lookup(boltNutMax, fastnerType);
  nutThickL = lookup(nutThick, fastnerType);
  washerDiaL = lookup(washerDia, fastnerType);
  washerThickL = lookup(washerThick, fastnerType);
  socketHeadThickL = lookup(socketHeadThick, fastnerType);
  socketDiaL = lookup(socketDia, fastnerType);
  socketSizeL = lookup(socketSize, fastnerType);

  trans = washerDiaL*1.5;

  color("blue")
    mBolt(size = fastnerType, len = customizerLen);

  translate([trans, 0, 0])
    color("red")
    mBolt(size = fastnerType, style = "hex", len = customizerLen);

  translate([trans*2, 0, 0])
    color("green")
    mNut(size = fastnerType);

  translate([trans*3, 0, 0])
    color("orange")
    mWasher(size = fastnerType);

  translate([trans*4+15, 0, 0])
    tSlotDemo();
}

module tSlotDemo() {
  thick = 3; // material thickness
  sheet = [30, 20, thick];
  tol = 0.5; // tolerance

  difference() {
    color("blue")
      cube(sheet, center = true);
    translate([0, 10-4.6, 0])
      tSlot(size = m3, material = thick, bolt = 10, tolerance = tol);
  }

  difference() {
    color("yellow")
      translate([0, 10+3/2, 0])
      cube([30, thick, 25], center=true);
    translate([0, 10-4.6+thick])
      rotate([-90, 0, 0])
      mBolt(m3, len = 10, tolerance = 0.1);
  }

  translate([0, 10-4.6+thick-tol, 0])
    rotate([-90, 0, 0])
    color("silver")
    mBolt(m3, len = 10, tolerance = 0.01);

  translate([0, 10-4.6, 0])
    rotate([-90, 30, 0])
    color("gray")
    mNut(m3);

}

simpleDemo();
//demo();
//mWasher(m10);
//mNut(m3);
//mBolt(m3);
//mBolt(size = m3, style = "hex");
//mBolt(m3, tolerance = 0.02, center = false, style = "hex", len = 15);
//mBolt(m3, tolerance = 0.05, center = true, len = 6);
//tSlot(size = m3, bolt = 10);

//tSlotDemo();

```


[User]
I'm working on a delta 3D printer design and need a parametric OpenSCAD model for an endstop mount. I've got an existing design that I like, but I want to make sure it's fully parametric and easily adjustable. The mount needs to attach to 2020 aluminum extrusion and hold a standard opticoupler endstop board.

Here's what I'm looking for in terms of features and parameters:

*   **Overall Dimensions:**
    *   `endstopThickness`: The thickness of the main body of the mount.
    *   `endstopHeight`: The overall height of the mount.
    *   `endstopNarrowWidth`: The width of the main part of the mount, which should match the width of the 2020 extrusion (typically 20mm).
*   **Recess for Opticoupler PCB:**
    *   `endstopRecessDepth`: The depth of the cutout for the circuit board.
    *   `endstopRecessHeight`: The height of the cutout.
    *  `endstopRecessWidth`: The width of the cutout.
*   **Shelf for Opticoupler Alignment:**
    *   `enstopShelfWidth`: The overall width of the shelf where the opticoupler sits.
    *   `endstopShelfHeight`: The height of the shelf that supports the opticoupler, this is usually the same as the height of the opticoupler.
    *   The shelf should be offset so that the opticoupler is aligned with the center of the rail. This can be calculated using `endstopShelfOffset = enstopShelfWidth - endstopNarrowWidth;`
*   **Mounting Holes for Opticoupler:**
    *   `endstopBoltHoleWidth`: The center-to-center distance between the opticoupler mounting holes.
    *   `endstopBoltHoleDiameter`: The diameter of the mounting holes for the opticoupler.
*   **Mounting Holes for the Extrusion:**
    *   `mountingBoltHoleDiameter`: The diameter of the mounting holes for attaching the bracket to the 2020 extrusion.
*   **Rounded Corners:** I'd like the edges of the mount to be rounded for a more finished look. I'm thinking a radius of around 2mm for all the outside edges.

I think it should be built using a `roundCornersCube` module that uses a `createMeniscus` module to round the edges of a cube. I'd like the `createMeniscus` module to be a subtractive function using the difference between a cylinder and a cube.

I'd also like to use a module called `cylinder_outer` that uses a $fn parameter to build a cylinder, and for a module called `cylinder_outerdual` that does the same but has two radii, and finally for a module called `cylinder_mid` that uses a different fudge factor for its radius calculation.

Could you generate the OpenSCAD code for this, using these parameters and modules?  I'm not picky about the specifics of $fn for the cylinders, just that they're there. I don't need you to use any external libraries like MCAD or BOSL.

[Assistant]
deltaendstop.scad:
```
// The amount added to a cut out to ensure a clean hole.
holeCreationOffset=0.05;
// How thick the endstop is
endstopThickness=3;
// How deep the recess is inside of the endstop, this is the cut out for the circuitry on the bottomside of the endstop PCB
endstopRecessDepth=1;
// How tall the recess is into the endstop part
endstopRecessHeight=10;
// How wide the recessed portion of the endstop is
endstopRecessWidth=15.5;
// How tall the over all endstop is
endstopHeight=25;
// How wide the endstop is, this should equal your aluminum extrusion width
endstopNarrowWidth=20;
// The shelf that is on the endstop, this is to offset the opticoupler by the amount needed to center the opticoupler
enstopShelfWidth=25;
// How tall the shelf is, this should be the height of the opticoupler
endstopShelfHeight=10;
endstopShelfOffset=enstopShelfWidth-endstopNarrowWidth;
// The offset for the opticouplers mounting holes, center to center
endstopBoltHoleWidth=19.5;
// The diameter of the mounting holes for the opticoupler
endstopBoltHoleDiameter=2.5;
// The diameter of the mounting holes for the endstop bracket itself
mountingBoltHoleDiameter=3;
mountingBoltHoleRadius=mountingBoltHoleDiameter/2;
endstopBoltHoleRadius=endstopBoltHoleDiameter/2;

module cylinder_outer(height,radius,fn){
   fudge = 1/cos(180/fn);
   cylinder(h=height,r=radius*fudge,$fn=fn, center = true);
}

module cylinder_outerdual(height,radius,radiustwo,fn){
   fudge = 1/cos(180/fn);
   cylinder(h=height,r1=radius*fudge,r2=radiustwo*fudge,$fn=fn, center = true);
}

module cylinder_mid(height,radius,fn){
   fudge = (1+1/cos(180/fn))/2;
   cylinder(h=height,r=radius*fudge,$fn=fn, center = true);
}

module createMeniscus(h,radius) {// This module creates the shape that needs to be substracted from a cube to make its corners rounded.
    difference(){        //This shape is basicly the difference between a quarter of cylinder and a cube
       translate([radius/2+0.1,radius/2+0.1,0]){
          cube([radius+0.2,radius+0.1,h+0.2],center=true);         // All that 0.x numbers are to avoid "ghost boundaries" when substracting
       }

       cylinder(h=h+0.2,r=radius,$fn = 25,center=true);
    }
}

module roundCornersCube(x,y,z,r){  // Now we just substract the shape we have created in the four corners
    difference(){
       cube([x,y,z], center=true);

    translate([x/2-r,y/2-r]){  // We move to the first corner (x,y)
          rotate(0){
             createMeniscus(z,r); // And substract the meniscus
          }
       }
       translate([-x/2+r,y/2-r]){ // To the second corner (-x,y)
          rotate(90){
             createMeniscus(z,r); // But this time we have to rotate the meniscus 90 deg
          }
       }
          translate([-x/2+r,-y/2+r]){ // ...
          rotate(180){
             createMeniscus(z,r);
          }
       }
          translate([x/2-r,-y/2+r]){
          rotate(270){
             createMeniscus(z,r);
          }
       }
    }
}

module endstop(){
    difference (){
        union(){
            roundCornersCube(endstopNarrowWidth,endstopHeight,endstopThickness,2);
            translate([endstopShelfOffset/2,endstopHeight/2,0]) roundCornersCube(enstopShelfWidth,endstopShelfHeight,endstopThickness,2);
        }
    translate([endstopShelfOffset/2,endstopHeight/2,(endstopThickness/2) - (endstopRecessDepth/2)]) cube([endstopRecessWidth,endstopRecessHeight + holeCreationOffset,endstopRecessDepth + holeCreationOffset], center=true);
        translate([endstopNarrowWidth/2 + endstopShelfOffset/2,endstopHeight/2,0]) cylinder_outer(20,endstopBoltHoleRadius,20);
translate([-enstopShelfWidth/2 + endstopShelfOffset,endstopHeight/2,0]) cylinder_outer(20,endstopBoltHoleRadius,20);

        translate([0,3,0]) cylinder_outer(20,mountingBoltHoleRadius,20);
        translate([0,-endstopHeight/3,0]) cylinder_outer(20,mountingBoltHoleRadius,20);
    }
}

endstop();
```


[User]
Hey, I need some help creating a parametric model of breakaway header pins in OpenSCAD. I want to be able to specify the number of columns and rows, and the pitch between the pins. I need the individual pins to be modeled as well as the plastic base holding them together, and it would be good if I could easily center the whole array of pins on the origin or have the base sit at the origin. Also, a user should be able to center the pins vertically. I'd like the gold-colored pins to be distinct from the dark gray base and black plastic.

Could you generate all of the necessary OpenSCAD files, including the main file and any necessary modules? I don't need any external libraries like MCAD or BOSL for this, I think it should be doable from scratch.

[Assistant]
header_pins.scad:
```
/*
  Breakaway Header Pins: pitch 2.54, adjustable
  Aaron Ciuffo
  December 23 2015
  GPL V3

  derived from Molex KK 100 break-away header:
  http://www.molex.com/pdm_docs/sd/022032041_sd.pdf

  Usage (default values shown):
  ```
  use </path/to/libraries/header_pins.scad>
  //full
  headerPins(columns = 3, rows = 2, centerV = false, center = true, pitch = 2.52);
  //simple
  headerPins(3, 2);
  ```
  columns = integer number of columns (X axis)
  rows = integer number of rows (Y axis)
  centerV = vertically center around base - fale places bottom at origin
  center = center the array at the origin
  pitch = distance between center of each pin

  Note:
  * the breakaway connector is a bit of a fudge and does not appear at the same
    Z height for centered/versus non centered; this should be largely irrelevant

  updates can be found at GitHub:
  https://github.com/txoof/OpenSCAD_electronics

*/

/*[Dimensions]*/
//Columns
columns = 3; //[1:30]
//Rows
rows = 2; //[1:5]
//Pitch
pitch = 2.54; //[1.25, 1.27, 2, 2.54, 3.5, 3.96]

module singlePin(center = false) {
  pinDimensions = [.67, .67, 14.22];
  nylonDimensions = [2.36, 2.36, 3.3];
  pinAboveNylon = 7.49;

  trans = center == false ? [0, 0, nylonDimensions[2]/2] : [0, 0, 0];

  translate(trans)
  union() {
    translate([0, 0, (-pinDimensions[2]/2+nylonDimensions[2]/2)+pinAboveNylon])
      color("gold")
      cube(pinDimensions, center = true);
    color("darkgray")
      cube(nylonDimensions, center =true);
  }
}

module headerPins(columns = 3, rows = 2, centerV = false, center = true, pitch = 2.54) {
  transV = centerV == false ? pitch/2 : 0; // vertical center

  trans = center == false ? [0, 0, 0] : [-(columns-1)*pitch/2, -(rows-1)*pitch/2, 0];

  echo (trans);
  translate(trans)
  union() {
    for (i = [0:columns-1]) {
      for (j = [0:rows-1]) {
        translate([pitch*i, pitch*j, 0])
          singlePin();
      }
    }
    translate([0, 0, -pitch/2+transV])
      color("black")
      cube([pitch*(columns-1), pitch*(rows-1), 2]);
  }
}

//singlePin();
headerPins(columns = columns , rows = rows, pitch = pitch);

```


[User]
I'd like to create a customizable key chain, and I need an OpenSCAD design for it.

Here are the specifications:

*   **Text:** The key chain should have text on it, and this text should be a parameter.
*   **Font:**  I want to be able to control the font used for the text, including selecting from Google Fonts. I also need to be able to control font style (regular, bold, italic, and bold italic).
*   **Dimensions:** I need to be able to set the width, length, and thickness of the key chain, as well as how rounded the corners are.
*   **Shape:** The overall shape will be a rounded rectangle with a hole for a key ring. The hole should also have rounded corners on the inside edge.
*   **Color:** The text should be slightly inset and filled in with a different color than the main body. Ideally, the text should be green on the inside.
*   **Preview:** A preview in OpenSCAD with the view pointing south and tilted from the top would be nice.

I'm not including any code libraries, and I'd like you to design this from scratch.

[Assistant]
key-chain.scad:
```
/*
 * Personal Key Chain
 *   v1.1
 *   December 2015
 *   by Jonathan Meyer (jon@stej.com)
 */

// preview[view:south, tilt:top]

// The name to display on the key chain.
name = "2017";

/* [Font] */

// The font to write the name in.
font = 1; // [0:Google (give name below), 1:Helvetica, 2:Times, 3:Arial, 4:Courier]

// the name of the font to get from https://www.google.com/fonts/
google_font = "Arial Unicode MS";

// The Font Style. Not all styles work with all fonts.
style = 4; // [0:None, 1:Regular, 2:Bold, 3:Italic, 4:Bold Italic]

/* [Size] */

// How tall the key chain will be.
width = 20; // [15:30]

// How long the key chain will be.
length = 65;  // [40:100]

// How thick the key chain will be.
thickness = 5; // [3:10]

// How round the corners will be
roundness = 2;   // [1:5]

/* [Hidden] */

font_list = [undef,
             "Helvetica",
             "Times",
             "Arial Unicode MS",
             "Courier",
             "Symbola",
             "Apple Color Emoji",
             "serif",
             "Code2001"];

style_list = [undef,
              "Regular",
              "Bold",
              "Italic",
              "Bold Italic"];

w = width;
l = length;
d = thickness;
r = roundness;
t = str(name);

fn = (font == 0) ? google_font : font_list[font];
sn = (style_list[style] != undef) ? str(":style=",style_list[style]) : "";
f = str(fn,sn);

echo(str("Font Used -> ", f));

union(){
  difference(){
    hull(convexity=10){
      translate([-((w/2)+(l/2)-2.5),0,0])
      minkowski(convexity=10){
        cylinder(h=d-r,d=w, center=true, $fn=100);
        sphere(d=r, $fn=100);
      }

      minkowski(convexity=10){
        cube([l,w,d-r],true);
        sphere(d=r, $fn=100);
      }
    }

    translate([-((w/2)+(l/2)-2.5),0,0])
    difference(){
      cylinder(h=d*2, d=w, center=true, $fn=100, convexity=10);

      rotate_extrude(convexity=10, $fn=100)
      translate([(w-d+r)/2,0,0])
      minkowski(convexity=10){
        square([d-r,d-r],true);
        circle(d=r,$fn=100);
      }
    }

    translate([0,0,0])
    linear_extrude(height=d/2, convexity=10)
    text(t, valign="center", halign="center", font=f, $fn=100, script="dingbats");
  }

  // color the inside of the text
  color([0,1,0,1])
  translate([0,0,(-d/2)+.3])
  linear_extrude(height=d/2)
  text(t, valign="center", halign="center", font=f);
}

```


[User]
I need a design for a flat, customizable duct tape reel that I can 3D print. I want to be able to adjust the width of the duct tape it holds, as well as the overall length and thickness of the reel. I'd also like the option to print it in two halves that snap together, or as a single piece.

Specifically, here's what I'm looking for:

*   **Duct Tape Width:** This should be a parameter to specify the width of the duct tape that the reel will hold.
*   **Reel Length:** This is the length of the rectangular part of the reel (excluding the circular ends), that is also adjustable.
*   **Reel Thickness:** I want to be able to specify how thick the reel is when fully loaded with tape.
*   **End Thickness:** I also want to be able to control how thick the circular ends are
*   **Print Options:**
    *   The ability to print it as a single piece, probably requiring supports.
    *   The ability to print it in two halves that connect together.
*   **Connector Gap:** If printing in two halves, I need a way to adjust the gap between the connectors, to allow the two halves to fit together nicely.

The design should consist of a rectangular section with circular ends.  The center of the reel, where the tape goes, should be slightly less thick than the circular ends to prevent the tape from slipping off.

I'd like the design to also consider the build plate size and include a build plate display that is selectable from several common sizes. Include a manual override so the x and y size of the build plate can be specified directly. The following sizes should be available:
    * Replicator 2
    * Replicator
    * Thingomatic
    * Manual

For these selections, use the `utils/build_plate.scad` library to generate the build plate.

I don't think I need any other libraries at the moment.

Can you help with this?

[Assistant]
CustomizableFlatDuckTapeReel.scad:
```
/* [Reel] */
// What is the width of your duct tape?
DUCT_TAPE_WIDTH = 50; // [40:1:60]

// How long should the reel be?
REEL_LENGTH = 75; // [50:5:100]

// How thick should the fully loaded reel be?
REEL_THICKNESS = 15; // [10:1:20]

// How thick should the reel ends be?
END_THICKNESS = 3; // [2:0.5:4]

// What to print?
PART = "both"; // [single:Single, top:Top Half Only, bottom:Bottom Half Only, both:Both Halves]

// If printing in two pieces how much gap to leave between connector to insure the pieces fit together?
CONNECTOR_GAP_ADJUSTMENT = 0.25; // [0.25:0.05:0.5]

/* [Build Plate] */
use <utils/build_plate.scad>
//for display only, doesn't contribute to final object
build_plate_selector = 0; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]

//when Build Plate Selector is set to "manual" this controls the build plate x dimension
build_plate_manual_x = 100; //[100:400]

//when Build Plate Selector is set to "manual" this controls the build plate y dimension
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

/* [Hidden] */
CORE_THICKNESS = 5;
CONNECTOR_HEIGHT = 20;
$fn = 60;

main();

module main() {
    if (PART == "single") {
        whole_reel();
    }
    else {
        if (PART == "top" || PART == "both") {
            top();
        }
        if (PART == "bottom" || PART == "both") {
            bottom();
        }
    }
}

module top() {
    translate ([0, REEL_THICKNESS / 2 + 5, 0]) {
        difference() {
            half_reel();
            translate ([0, 0, (DUCT_TAPE_WIDTH + END_THICKNESS) / 2]) {
                connector (clearance = +CONNECTOR_GAP_ADJUSTMENT);
            }
        }
    }
}

module bottom() {
    translate ([0, -REEL_THICKNESS / 2 - 5, 0]) {
        union() {
            half_reel();
            translate ([0, 0, (DUCT_TAPE_WIDTH + END_THICKNESS) / 2]) {
                connector (clearance = -CONNECTOR_GAP_ADJUSTMENT);
            }
        }
    }
}

module whole_reel() {
    linear_extrude (height = END_THICKNESS) {
        reel_shape (REEL_THICKNESS);
    }
    translate ([0, 0, END_THICKNESS]) {
        linear_extrude (height = DUCT_TAPE_WIDTH) {
            reel_shape (CORE_THICKNESS);
        }
        translate ([0, 0, DUCT_TAPE_WIDTH]) {
            linear_extrude (height = END_THICKNESS) {
                reel_shape (REEL_THICKNESS);
            }
        }
    }
}

module half_reel() {
    linear_extrude (height = END_THICKNESS) {
        reel_shape (REEL_THICKNESS);
    }
    translate ([0, 0, END_THICKNESS]) {
        linear_extrude (height = DUCT_TAPE_WIDTH / 2) {
            reel_shape (CORE_THICKNESS);
        }
    }
}

module connector (clearance = 0) {
    linear_extrude (height = CONNECTOR_HEIGHT - clearance,
                    center = true) {
        reel_shape (CORE_THICKNESS + clearance - 2);
    }
}

module reel_shape(endDiameter) {
    for (x = [-1, 1]) {
        translate ([x * (REEL_LENGTH - REEL_THICKNESS) / 2, 0]) {
            circle (d = endDiameter);
        }
    }
    square (size = [REEL_LENGTH - REEL_THICKNESS, endDiameter], center = true);
}

```


[User]
Hey, I'm looking to create a small, heart-shaped box with a clever hinged opening, and I'd like it to be parametric. I have some specific ideas, but I'm not sure how to code it up in OpenSCAD.

Basically, I envision a heart shape that's split into four sections: an upper left, upper right, lower left, and lower right. The box should open by having the upper left and upper right sections rotate outwards along hinges connected to the lower left and lower right, respectively. It's important that the lower left and lower right sections act as the base and do not move. There needs to be a sort of "cleave" angle when the top parts open, but not so much that it's flat - think of a heart being split apart along a diagonal.

The box should have a latching mechanism. I was thinking of a circular clasp, essentially a cylinder, on the lower portions that fit into a slightly smaller cylinder on the upper portions. This should be designed so that the upper sections stay closed until you intentionally open them.

I would like to customize the box with initials on the sides. The first initial should appear on the upper and lower left portions, and the last initial on the upper and lower right. I'd like to be able to specify these initials. I would also like to control the font size of the initials.

Other parameters I would like to control include: wall thickness, tolerance between moving parts, the overall length of the box's midsection, width of the flat face, height of the box, the space between the hinges, the depth of the nub that forms the clasp, and the quality of the render. I want to use a fairly fine quality, not something too drafty, but I don't need it to be *perfect*. I'd also like to set the "cleave angle" and number of zigzags in the side walls.

I would like to use the `write` module from the write/Write.scad library to handle the text, and I'd like to specify the font used for the text.

I am hoping to do some basic animations. The animation should make the top two parts of the heart rotate away from each other, showing the open and closed state of the box. It should cycle smoothly.

Can you help me generate this? Let me know if you need any clarification.

[Assistant]
SecretHeart2.scad:
```
// All-at-once Secret Heart Box

assembly();
//animation();

//First Initial
first="";
//Last Initial
last="";
//Wall Thickness
wallT=1.6;
//Tolerance between moving parts
tol=0.3;

use <write/Write.scad>

//Height of words
fontsize=14+0;
//Length of parallel midsection
L=30+0;
//Width of flat face
W=25+0;
//Height of box
H=20+0;
//Space between hinges
x_hinge=16+0;
//Depth of sliding nubs
nub=2+0;
//Smoother renders slower
quality=4+0;//[1:Draft,2:Medium,4:Fine]
//Angle of opening (deg)
cleaveAngle=40+0;
//Number of zigzags
n=1+0;

T=wallT/2;
$fa=12/quality;
$fs=2/quality;
phi=atan(W/L);// heart angle
R=H/2-2*nub;// clasp radius
R1=H/2-2*nub;// cleave radius
t1=1-2*abs($t-0.5);// makes time loop back and forth

module animation(){
phi= t1<0.5 ? 0 : (t1-0.5)*2*90;
psi= t1<0.5 ? (t1-0.5)*2*180 : 0;
	LowerLeft();
	translate([0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])rotate([-phi,0,0])
		translate(-[0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])UpperLeft();
	rotate([psi,0,0]){
		translate([0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])rotate([-phi,0,0])
			translate(-[0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])UpperRight();
		LowerRight();
	}
}

module assembly()
translate([0,0,H/2]){
	LowerLeft();
	UpperLeft();
	LowerRight();
	UpperRight();
}

module UpperLeft()
render()
difference(){
    cleave(lower=false)Left();
    translate([-3/2*tol-nub-T,0,0])hingeGap();
    translate([-x_hinge,0,0])mirror([1,0,0])hingeGap();
    #translate([-L/2*sin(phi)-.05*W,L/2*cos(phi),H/2])letter(first);
}

module LowerLeft()
render()
difference(){
    union(){
        cleave(lower=true)Left();
        difference(){
            clasp(inside=1);
            translate([-tol/2,0,-R+T+nub+2*tol])rotate([0,-25,0])translate([0,0,-H])cube(2*H,center=true);
        }
        translate([-3/2*tol-nub-T,0,0])hinge();
        translate([-x_hinge,0,0])mirror([1,0,0])hinge();
        brace();
    }
    #translate([-0.28*L,0.2*L,-H/2])rotate([0,180,180])letter(first);
}

module UpperRight()
render()
difference(){
    cleave(lower=false)Right();
    translate([3/2*tol+nub+T,0,0])mirror([1,0,0])hingeGap();
    translate([x_hinge,0,0])hingeGap();
    clasp(inside=0);
    #translate([L/2*sin(phi)+.05*W,L/2*cos(phi),H/2])letter(last);
}

module LowerRight()
render()
difference(){
	union(){
		cleave(lower=true)Right();
		translate([nub+T,0,2*T-H/2])translate([6,5,0])scale(0.8)monogram(h=1);
		translate([3/2*tol+nub+T,0,0])mirror([1,0,0])hinge();
		translate([x_hinge,0,0])hinge();
		mirror([1,0,0])brace();
	}
	translate([nub+T+tol/2,0,0])rotate([0,90,0])cylinder(r=R,h=tol);
	clasp(inside=0);
    #translate([0.28*L,0.2*L,-H/2])rotate([0,180,180])letter(last);
}

module letter(word)
translate([0,.2*fontsize,0])write(word,t=1,h=fontsize,center=true,font="../write/BlackRose.dxf");

//module letter1()
//scale(14/15)render()
//union(){
//    letter("A");
//    letter("B");
//    letter("C");
//    letter("D");
//    letter("E");
//    letter("F");
//    letter("G");
//    letter("H");
//    letter("I");
//    letter("J");
//    letter("K");
//    letter("L");
//    letter("M");
//    letter("N");
//    letter("O");
//    letter("P");
//    letter("Q");
//    letter("R");
//    letter("S");
//    letter("T");
//    letter("U");
//    letter("V");
//    letter("W");
//    letter("X");
//    letter("Y");
//    letter("Z");
//}

module brace()
intersection(){
	rotate([cleaveAngle,0,0])translate([0,R1,0])difference(){
		cylinder(r=nub+2*T+tol*3/2,h=3*H,center=true);
		translate([L-nub-T,0,0])cube(2*L,center=true);
		translate([L-nub-T-tol*3/2,L,0])cube(2*L,center=true);
	}
	difference(){
		translate([0,0,0])cube([L,2*(R1*sqrt(2)+H/2+nub),H-T],center=true);
		difference(){
			translate([0,0,L+H/2-3*T])cube(2*L,center=true);
			rotate([cleaveAngle-90,0,0])cube([2*L,2*L,2*R1],center=true);
		}
	}
}

module cleave(lower=true){
y = lower==true ? L+R1 : -L+R1+tol;
difference(){
	children(0);
	rotate([cleaveAngle,0,0])translate([0,y,0])cube(2*L,center=true);
}
}

module Right()
difference(){
	union(){
		mirror([1,0,0])hollowbase();
        intersection(){
            cube([L+W,L+W,H],center=true);
            for(i=[0:n-1])rotate([0,-90,0])ring(H/2+(4*i+1)*nub);
        }
        intersection(){
            rotate([0,-90,0])ring(R=H/2-nub);
            rotate([cleaveAngle,0,0])translate([-H/2,H/2-2*nub+tol/2,-H-tol/2])cube(H);
        }
	}
    difference(){
        rotate([0,-90,0])ring(R=H/2-nub);
        rotate([cleaveAngle,0,0])translate([0,2*nub,-H/2-tol/2])cube([3*nub,H,H],center=true);
    }
    for(i=[0:n-1])rotate([0,-90,0])ring(H/2+(4*i+3)*nub);
}

module Left()
difference(){
	union(){
		hollowbase();
        intersection(){
            cube([L+W,L+W,H],center=true);
            for(i=[0:n-1])rotate([0,90,0])ring(H/2+(4*i+3)*nub);
        }
        intersection(){
            rotate([0,90,0])ring(R=H/2-nub);
            rotate([cleaveAngle,0,0])translate([-H/2,H/2-2*nub+tol/2,tol/2])cube(H);
        }
	}
	difference(){
        rotate([0,90,0])ring(R=H/2-nub);
        rotate([cleaveAngle,0,0])translate([0,2*nub,H/2+tol/2])cube([3*nub,H,H],center=true);
    }
    for(i=[0:n-1])rotate([0,90,0])ring(H/2+(4*i+1)*nub);
}

module clasp(inside=0)
rotate([0,90,0])translate([0,0,tol/2+.01])union(){
	translate([0,0,T-nub])cylinder(r1=R-2*nub-tol*inside,r2=R-tol*inside,h=2*nub+.02);
    //cylinder(r=R-2*T-tol*inside,h=2*(nub+T),center=true);
}

module ring(R)
rotate_extrude()translate([R,-tol/2])rotate(45)square(nub*sqrt(2),center=true);

module hollowbase()
difference(){
	base(inside=0);
	difference(){
		base(inside=1);
		translate([-nub-T,0,0])hinge();
		translate([-L-x_hinge,R1/cos(cleaveAngle)+H/2,-H/2])cube([L,2*nub,nub]);
		translate([-L-x_hinge,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])
			rotate([0,90,0])cylinder(r=nub,h=L);
	}
}

module hinge()
translate([-nub/2,R1/cos(cleaveAngle)+H/2-nub/2,-H/2+nub])
difference(){
	union(){
		translate([0,-2*nub,0])cube([nub,6*nub,2*nub],center=true);
		translate([0,nub,0])rotate([0,90,0])cylinder(r=nub,h=nub,center=true);
		translate([nub/2-.01,nub,0])rotate([0,90,0])cylinder(r1=nub,r2=0,h=nub);
	}
	translate([0,-6*nub,2*nub])rotate([45,0,0])cube(6*nub,center=true);
}

module hingeGap()
translate([-nub/2,R1/cos(cleaveAngle)+H/2-nub/2,-H/2+nub])
union(){
	translate([0,tol-nub,0])cube([nub+2*tol,6*nub,2*nub+2*tol],center=true);
	translate([nub/2+tol-.01,nub,0])rotate([0,90,0])cylinder(r1=nub,r2=0,h=nub);
}

module base(inside=0){
W=W-4*T*inside;
intersection(){
	rotate([0,0,90+phi])union(){
		cube([L,W,2*H],center=true);
		translate([L/2,0,0])rotate([0,0,90])cylinder(r=W/2,h=2*H,center=true);
		translate([0,W/2-H/2,0])rotate([0,90,0])rotate([0,0,90])cylinder(r=H/sqrt(2),h=L,center=true);
		for(i=[-1,1])translate([i*L/2,0,0])rotate([0,0,90])
			rotate_extrude(convexity=2)difference(){
				translate([W/2-H/2,0])circle(r=H/sqrt(2));
				translate([-H,0])square(2*H,center=true);
			}
	}
	translate([-L-(nub+T)*inside-tol/2,0,0])cube([2*L,2*L,H-4*T*inside],center=true);
}
}

module monogram(h=1)
linear_extrude(height=h,center=true)
translate(-[3,2.5])union(){
	difference(){
		square([4,5]);
		translate([1,1])square([2,3]);
	}
	square([6,1]);
	translate([0,2])square([2,1]);
}
```


[User]
Hey, so I need to get a replacement part designed for my daughter's bike. It's a little plastic bracket that keeps the training wheels from rubbing on the frame. I've included the scad file I came up with, but I'd like something a little more robust, and parametric so I can adjust it for any bike if I need to.

The current design is okay, but it's a bit... chunky. It's basically a rectangular block with a cutout for the bike frame, and another cutout for the training wheel axle. I'm worried about the strength of the material near the metal axle, so I tried to thicken that up in the current design - but I think the current one might be a little *too* thick! I think the cutout needs to have a stronger overall shape, maybe an oval or a rounded rectangle - or maybe even a completely custom shape? I think a lip for that edge would also help give it more support for those forces. I'm not very good at CAD software, so I'd appreciate it if you could take my attempt and make something a little better, and parametric.

Ideally, I'd like to be able to adjust:

*   The overall width, length, and depth of the bracket.
*   The inner offset (how far the frame cutout is from the edge)
*   The radius and depth of the frame cutout.
*   The radius and depth of the axle cutout (including being able to create a d-shaped or rectangular cutout, not just a cylinder)
*   The wall thickness of the bracket (including the lip at the edge of the frame cutout).

Also, I'd like to be able to specify the overall shape of the bracket itself - maybe a rectangle, rounded rectangle, or something else entirely.

For libraries, I think it would be really useful to use the BOSL2 library - I know it has a lot of great features for creating shapes and handling parameters.

I'm hoping that the AI can create some better shapes and also incorporate features like a lip for the frame cutout to make it stronger. Maybe also some fillets and chamfers to make it look better too?

[Assistant]
training_wheel_bracket.scad:
```
innerOffset = 7.8;
radius = 13;
depth = 7.2;
wallThickness = 1.7;
width = 27.25;
length = 43;

module cutoutpiece(adjust)
{
    union(){
        translate([0,innerOffset,0]) cube([radius, (radius*2)-adjust,depth]); //inner rectangle
        translate([radius,radius + innerOffset-(adjust/2),0]) cylinder(depth,r=(radius - (adjust/2)));
    }
 }

difference(){
    cube([width, length, depth]); //outer cube
    difference(){
        translate([wallThickness * 2, wallThickness, wallThickness]) cube([width - wallThickness, length - (wallThickness *2), depth - (wallThickness * 2)]); // innercube
        cutoutpiece(0);
    }
    translate([0,wallThickness/2,0]) cutoutpiece(wallThickness);
}

```


[User]
Hey, I need an adjustable timing belt tensioner designed in OpenSCAD, similar to the one described at http://www.thingiverse.com/thing:26361 but with more parametric control. I'd like the tensioner to consist of two main parts.

The first part is the frame which has a slot for the bolt, a nut recess, and is mountable. The second part is a cylindrical tensioner that the bolt acts against.

Here are the parameters I'd like to control:

*   **NutWrenchSize**: The wrench size for the nut to be embedded.
*   **NutHeight**: The height of the nut.
*   **Diameter**: The diameter of the bolt.
*   **NutFixingRatio**: A ratio determining how far the nut recess projects out from the main body (something like 1.5 would work)
*   **BoltHeadD**: The diameter of the bolt head.
*   **BoltHeadH**: The height of the bolt head.
*    **BeltWidth**: The width of the timing belt.
*   **BeltHeight**: The height of the timing belt.
*   **Wall**: The wall thickness of the frame.
*   **IsOpen**: A boolean to control if there is a slot for inserting the belt. If it's "false", it should be a closed shape.

I'd like to ensure the nut recess in the frame is a hexagonal shape that fits the specified nut parameters, and has a hole through it for the bolt. The bolt head should be recessed slightly into the cylindrical tensioner. The cylindrical tensioner should be able to rotate in the slot cut into the main frame. There should also be some room around the belt so it doesn't rub against anything.

I'm happy for this to be split into two separate .scad files, one for each part. Can you generate these for me? I'm not using any special libraries, but let me know if that changes.

[Assistant]
timingBeltTensor.scad:
```

//Wrench size of the nut
NutWrenchSize=5.7;

//Nut Height
NutHeight=2.8;

//Diameter of bolt
Diameter=4;

//Nut to wall ratio
NutFixingRatio=1.5;

//Bolt Head diameter
BoltHeadD=6.5;

//Bolt Head Height
BoltHeadH=2;

//Belt Width
BeltWidth=7;

//Belt Height
BeltHeight=1.8;

//Wall thickness
Wall=1.2;

//Open option
IsOpen=true;

module pole(r,h){
    intersection(){
        cube([r,r,h]);
        cylinder(r=r,h=h);
    }
}

module frame(l,w, wall=2,space=2){
    r= l/3-space;
    h=r+wall;
    union() {
        cube([l,wall,h]);
        translate([0,w-wall,0]) cube([l,wall,h]);
        translate([0,w,0]) rotate([90,0,0]) pole(r,w);
        translate([l,w,0]) rotate([90,-90,0]) pole(r,w);
        translate([l/3,0,0]) cube([l/3,w,h]);
    }
}

module part1(nws,nh,nsr,w1d,w2d,w2h,bw,bh){
    wall=Wall;
    nd=nws*2*sqrt(3)/3;
    echo(nd);
    w=bw+wall*2;
    difference(){
        frame((nd*nsr)*3,w, wall, bh);
        translate([(nd*nsr)*1.5,w/2,0]) cylinder(d=nd,h=nh,$fn=6);
        translate([(nd*nsr)*1.5,w/2,0]) cylinder(d=w1d,h=(nd*nsr));
        translate([(nd*nsr)*1.5,w/2,(nd*nsr)-w2h]) cylinder(d=w2d,h=w2h);
        if(IsOpen){
            translate([(nd*nsr)-bh,0,0]) cube([bh,Wall,(nd*nsr)]);
            translate([(nd*nsr)*2,0,0]) cube([bh,Wall,(nd*nsr)]);
        }
    }
}

module part2(nws,nsr,w1d,bw,bh){
    nd=nws*2*sqrt(3)/3;
    l=nd*nsr;
    difference(){
        union(){
            translate([0,0,-Wall]) cylinder(d=l+bh*2,h=Wall);
            cylinder(d=l,h=bw);
            translate([0,0,bw]) cylinder(d=l+bh*2,h=Wall);
        }
        translate([-(l+bh*2)/2,0,-Wall]) cube([l+bh*2,(l+bh*2)/2,bw+2*Wall]);
        translate([0,0,bw/2]) sphere(d=w1d);
    }
}

part1(NutWrenchSize,NutHeight,NutFixingRatio,Diameter,BoltHeadD,BoltHeadH,BeltWidth,BeltHeight);
translate([-BeltWidth-3,Wall,0]) rotate([-90,0,0])
part2(NutWrenchSize,NutFixingRatio,Diameter,BeltWidth,BeltHeight);
```


[User]
I need an OpenSCAD file (or files) that can generate a corner piece for a wall, like for trim or molding. It should have a few adjustable parameters, and I'd like it to be somewhat customizable beyond just the dimensions.

Here are the basic things I need it to be able to do:

*   **Height (hi):** The main height of the wall piece, not including any decorative elements. Think of this as the flat part that sits against the wall.
*  **Total Height (h):** The total height of the object including decorative elements (like the slanted top). The difference between 'hi' and 'h' will determine the height of the decorative trim, specifically the slanted part at the top.
*  **Width (w):** The width of the corner piece, like the length of the sides you'd attach to the wall, basically a little more than the thickness.
*   **Corner Hug (corner):** This will let me control how much of the corner is wrapped. For a typical wall corner, this will likely be zero. If I were doing something where the corner wraps a mountain or some other kind of corner I would set it to a value greater than zero.
*   **Top Trim Height (t):**  This controls how high the decorative trim starts, measured down from h. So a smaller t means the trim starts lower and vice-versa.
*  **Rounded Radius (r):** The radius of the rounded corners at the top of the piece. This is the part of the design that makes it look more like trim than a hard edge.
*   **Rounded Corner Offset (ca):** This is the offset of those rounded corners. Imagine drawing a rectangle and then making the corner round; this is how much I'm pulling those round parts away from the vertical edges.
*   **Top Slant Angle (angle):**  The angle of the slant at the top.
*  **Edge Rounded Diameter (erd):** This parameter will define the diameter for rounded edges on all the corners. I want to make the sharp edges a little safer and softer.

I’d like to make it so that all the top decorations are built using additive methods (minkowski). The rest should be cut out using difference methods, like the original file. I think that should be more efficient.

I'd also like to use the BOSL library for the rounding and any other functionality where it makes sense. I'm planning on doing a lot of 3D prints of these, so having that library’s built-in parametric features would be very useful.

Can you generate that for me, please?

[Assistant]
wallcorner.scad:
```
//h=127.3;//4.25 3(5/8)in
hi=107.9;//(4.25*25.4);//the height of your trim

h=hi+19;//(.75*25.4);//add three quarters inch to that
w=19.5;//width of the corner
corner=8;//how much of the corner should this hug (for wrap-around corners)

t=8.6;//where the top should be??
r=5;//radius of rounded section
ca=3;//offset of the rounded section
angle=43;//angle of the slant at the top
erd=5;//edge rounded diameter
herd=erd/2;//edge radius
invisit=1;//unnecessary, used to make OpenSCAD previews cleaner

difference(){
minkowski(){//build the rounded rectangle
translate([herd,herd,0])cube([w,w,h]);
sphere(d=erd);//round that edge
}
translate([w,0,0])cube([w+erd,w+erd,h+erd]);//cut right edge
translate([0,w,0])cube([w+erd,w+erd,h+erd]);//cut back edge
translate([0,0,-w])cube([w+erd,w+erd,w]);//cut bottom edge
translate([0,0,h])cube([w+erd,w+erd,w]);//trim top edge
translate([0,herd,herd])translate([0,-ca,h-t])
	rotate([0,90,0])cylinder(h=w+invisit,r=r);//front rounded
translate([herd,0,herd])translate([-ca,0,h-t])
	rotate([-90,0,0])cylinder(h=w+invisit+erd,r=r);//left rounded
translate([herd,herd,herd])translate([0,0,h-t])
	rotate([angle,0,0])cube([w+invisit,h,w]);//front slant
translate([herd,herd,herd])translate([0,0,h-t])
	rotate([0,-angle,0])cube([h,w+invisit,w]);//left slant
translate([0,0,h-t])cube([3,3,20]);//takes out a little bit extra
translate([w-corner,w-corner,0])cube([corner+invisit,corner+invisit,h+invisit]);//remove the corner (use on mountain folds, not room corners)

}
```


[User]
I need a customizable wall frame hanger adapter. I've got a bunch of single screws in my walls, and I want to be able to hang frames with two hanger holes without adding more holes. I've got an existing SCAD file that I wrote a while back, but it's kind of clunky and hard to tweak. I'd like you to generate a new parametric OpenSCAD file (or files, if that makes sense) for me.

Here's what I need it to do:

*   **Main Idea**: The design should be a baseplate with two hooks on the bottom to hold the picture frame and a single mounting hole at the top to attach to the existing screw in the wall.

*   **Parameters:**
    *   `Precision`: This controls the number of vertices, and thus the smoothness of curves.
    *   `HooksToHole_Height`: Distance from the hooks to the center of the mounting hole.
    *   `BetweenHooks_Width`: Distance between the centers of the two hooks.
    *   `Thickness`: The overall thickness of the baseplate.
    *   `Hooks_Width`: The width of each hook.
    *   `Hooks_Depth`: The depth of each hook.
    *   `HookLip_Height`: The height of the lip on each hook.
    *   `TopScrewHole_Diameter`: Diameter of the top mounting hole.
    *   `BottomScrewHole_Diameter`: Diameter of the countersink on the top mounting hole.
    *   `ExtraEdge`: Extra space above the top mounting hole for stability.

*   **Functionality:**
    *   The baseplate should have a general rectangle shape with a mounting hole near the top center and the two hooks at the bottom.
    *   The mounting hole should have a countersink for a screw head.
    *   The hooks should have a lip that extends inward slightly to secure the picture frame.
    *   The corners at the top of the baseplate should have material removed to save material (and for the aesthetic of the corners being "clipped").
    *   I'd like the hooks to have a rounded shape, not a harsh sharp corner.

*   **Libraries:** I don't think I need any specific libraries for this design, but you might need to include a `hull()` function from the standard OpenSCAD library.

I'd like all the measurements to be configurable with the parameters I listed above. This should be reasonably easy to customize for different frames and wall situations. Can you help me with this?

[Assistant]
CustomizableWallFrameHanger_2015_12_25.scad:
```
echo("------------------------ BEGIN ------------------------");
////////////////////////////////////////////////////////////////////////////////////////////////////////
// Colors: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Transformations#hull
// HELP:   http://www.openscad.org/cheatsheet/index.html
// OPERATORS: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Mathematical_Operators
// http://www.homedepot.com/p/Crown-Bolt-1-4-in-20-x-36-in-Zinc-Plated-Threaded-Rod-17320/100338099
////////////////////////////////////////////////////////////////////////////////////////////////////////
// ----------------- NOTES ------------------
//
//
// ---------------------------------------------------------------------------------------------
// ----------------- Constants ------------------
Tolerance = 1*0.05;
SquareRootOfTwo = sqrt(2);
// ---------------------------------------------------------------------------------------------
// ----------------- Parameters ------------------
// (Effects # of vertices for every component)
Precision					= 200;
// (50=Default; The distance from the hooks to the screw hole)
HooksToHole_Height  		= 50;
// (100=Default; The distance between the center of each hook)
BetweenHooks_Width			= 100;
// (3=Default; The overall thickness of the hanger)
Thickness					= 3;
// (10=Default; The width of each hook)
Hooks_Width					= 10;
// (10=Default; The Depth of each hook)
Hooks_Depth					= 10;
// (10=Default; The Height of the Hooks Lip)
HookLip_Height				= 3;
// (4=Default; The width of the Small/Top Screw hole)
TopScrewHole_Diameter		= 4;
// (8=Default; The width of the Big/Bottom Screw hole)
BottomScrewHole_Diameter	= 8;
// (8=Default; The extra support above top Screw hole)
ExtraEdge					= 8;

// ---------------------------------------------------------------------------------------------
// PreCalculations
OverallHeight = ExtraEdge + HooksToHole_Height + ExtraEdge;
echo("OverallHeight",OverallHeight);
OverallWidth = ExtraEdge + (Hooks_Width/2) + BetweenHooks_Width + (Hooks_Width/2) + ExtraEdge;
echo("OverallWidth",OverallWidth);

// ---------------------------------------------------------------------------------------------
// Primary Build
union()
{
	// Baseplate
	difference()
	{
		// Primary baseplate
		cube([ OverallWidth, OverallHeight, Thickness], center=true);

		// Screw hole
		translate([ 0, (OverallHeight/2)-ExtraEdge-(TopScrewHole_Diameter/2), 0])
			ScrewHoleCutout(TopScrewHole_Diameter,BottomScrewHole_Diameter, Thickness);

		// Remove top right corner
		CornerCutout();

		// Remove top left corner
		mirror([1,0,0])
			CornerCutout();
	}

	// Bottom Right hook
	Hook();

	// Bottom Left hook
	mirror([1,0,0])
		Hook();
}

// ---------------------------------------------------------------------------------------------
// Modules
module Hook()
{
	translate([ BetweenHooks_Width/2, -((OverallHeight/2)-ExtraEdge-(Thickness/2)), (Hooks_Depth/2)+(Thickness/2)])
	{
		// Hook base
		RoundedCube( Hooks_Width, Thickness, Hooks_Depth );

		// Hook Lip
		translate([ 0, (Thickness/2)+(HookLip_Height/2)-((Thickness/2)/2), (Hooks_Depth/2)-(HookLip_Height/2)])
		rotate([90,0,0])
			RoundedCube( Hooks_Width, HookLip_Height, HookLip_Height+(Thickness/2) );

		// Hook Support
		translate([0,0,-(Thickness/2)])
		scale([1,ExtraEdge/(Thickness*2),1])
		{
			difference()
			{
				cylinder( h=Hooks_Depth-(Thickness/2), d1=Hooks_Width, d2=0, center=true, $fn=Precision);

				translate([0,Hooks_Width/2,0])
					cube([Hooks_Width, Hooks_Width, Hooks_Depth-(Thickness/2)+Tolerance ], center=true);
			}
		}
	}
}

module RoundedCube(x,y,z)
{
	hull()
	{
		translate([(x/2)-(y/2),0,0])
			cylinder( d=y, h=z, center=true, $fn=Precision);

		translate([-((x/2)-(y/2)),0,0])
			cylinder( d=y, h=z, center=true, $fn=Precision);
	}
	//cube([x, y, z ], center=true);
}

module CornerCutout()
{
	hull()
	{
		// Top right
		translate([(TopScrewHole_Diameter/2)+ExtraEdge, OverallHeight/2, -((Thickness+Tolerance)/2)])
			cube([OverallWidth, OverallHeight, Thickness+Tolerance ], center=false);

		// Bottom right
		translate([(OverallWidth/2), -(((OverallHeight/2)-ExtraEdge-(Thickness/2))-ExtraEdge), -((Thickness+Tolerance)/2)])
			cube([OverallWidth, OverallHeight, Thickness+Tolerance ], center=false);
	}
}

module ScrewHoleCutout(TopScrewHole_Diameter,BottomScrewHole_Diameter, Thickness)
{
	ScrewHoleOffset = (TopScrewHole_Diameter/2)+(BottomScrewHole_Diameter/2);

	//Top Screw Hole
	cylinder(d=TopScrewHole_Diameter,h=Thickness+Tolerance,center=true,$fn=Precision);

	hull()
	{
		//Top screw hole TAPER
		cylinder(h=Thickness+Tolerance, d1=0, d2=BottomScrewHole_Diameter, center=true, $fn=Precision);

		//Bottom screw hole TAPER
		translate([0,-(ScrewHoleOffset),0])
			cylinder(h=Thickness+Tolerance, d1=0, d2=BottomScrewHole_Diameter, center=true, $fn=Precision);
	}

	// Bottom Screw Hole
	translate([0,-(ScrewHoleOffset),0])
		cylinder(h=Thickness+Tolerance, d=BottomScrewHole_Diameter, center=true, $fn=Precision);

	// Cutout
	translate([0,-(ScrewHoleOffset/2),0])
		cube([TopScrewHole_Diameter, ScrewHoleOffset, Thickness+Tolerance], center=true);
}

echo("------------------------- END -------------------------");

```


[User]
Hey there, I'm looking to get a parametric OpenSCAD file created for a Z-stop adjuster for my FlashForge Creator Dual 3D printer. I've been using some different glass plates on the bed, and they all have slightly different thicknesses, so I need something adjustable.

Basically, the design needs to be a rectangular block with a cutout in the bottom that slips over a wooden piece on the printer. The height of the block above the cutout needs to match the glass plate thickness. I'd also like to be able to adjust the depth of the block, and the size of the cutout.

Here's a breakdown of what I need:

*   **Overall Shape:** A rectangular block.
*   **Cutout:** A rectangular cutout on the bottom that fits over a wood piece. The height of the cutout should be adjustable (since the different pieces of glass will require varying height).
*   **Parametric Dimensions:** I need to be able to set the following parameters:
    *   `glassPlateThickness`: The thickness of the glass plate.
    *   `woodThickness`: The thickness of the wood piece the adjuster slides over.
    *   `wallThickness`: The thickness of the walls of the block.
    *   `depth`: The overall depth of the block
*   **Orientation:** The block will need to be printed upside down so that no support material will be needed. I will rotate it in my slicer to place it on the print bed before printing it.

I'm thinking the code should be reasonably straightforward, I don't think we need any fancy libraries. It would be great if the AI could generate a single .scad file that has all the code.

[Assistant]
FlashForgeCreatorDualZStop.scad:
```
//
//    FlashForgetCreater Dual z stop adjuster
//
//    EvilTeach
//
//    12/25/2015
//

// The actual thickness of the piece of glass.
glassPlateThickness = 6.35;     // .25 inches
// glassPlateThickness = 5.08;     // .20 inches
// glassPlateThickness = 2.33;     // My piece of glass

// This is the thickness of the piece of wood that the part slips over as measured on my machine
woodThickness       = 5.25;

module main()
{
    wallThickness       = 2.00;

    width =  wallThickness + woodThickness + wallThickness;
    depth =  30;
    height = glassPlateThickness + 10.0;

    // Move the piece onto the build plate
    translate([0, 0, height])
        // Turn it upside down so no support material is needed
        rotate([0, 180, 0])
            difference()
            {
                // Draw a cube big enough to fit over the wood
                cube([width, depth, height]);
                // Offset into the middle of the block
                translate([wallThickness, 0, 0])
                    // Cut out the block that fits over the wood
                    cube([width - wallThickness - wallThickness,
                          depth,
                          height - glassPlateThickness]);
            }
}

main();
```


[User]
Okay, I'm looking to get a parametric OpenSCAD model for a sticker spool, designed to work with a Towa label applicator. I’ve got some specific dimensions in mind, and I want it to be adjustable for different sticker widths.

Basically, the spool needs a core for the sticker roll, a wider section to act as a guide, and a slot to hold the sticker paper in place, like with a nut. The core is going to have a center hole for the applicator axle. I've already seen a video (linked below) that provides a good idea of what I'm after:

https://www.youtube.com/watch?v=YU9D_fXws-E

Here are the parameters I'd like to be able to control:

*   `sticker_width`: The width of the stickers, which will also be about the width of the main part of the spool that holds the roll. This needs to be a main parameter that is adjustable. I'm currently planning on using 40mm width stickers.
*   `spoolCore_radius`: The radius of the core that holds the sticker roll. I'd like to set this to 27.5 mm initially.
*   `guide_width`: The width of the guide section of the spool, which is what holds the roll of the spool in place. I think this will be 10mm.
*   `guide_height`: The radius of the guide. I want the radius of this to be 32.5mm
*   `slot_width`: The width of the slot that holds the end of the sticker paper, which is used to fix it to a nut on the side. This will be 2mm.
*   `holeForAxle_radius`: The radius of the hole for the applicator axle. I want to set this to 27/2 mm.
*    `spoolCore_width`: This should be based on the `sticker_width` plus 5mm to account for the backing paper.

The design should have a cylindrical base, the guide section with the bigger radius, then the smaller radius cylindrical part where the stickers will go. In the guide section, there needs to be a small notch to place a nut and hold the end of the sticker roll. The cylindrical base should have a hole for the axle, and the main section needs to have the guide for the sticker paper.

I’d like this to be made so it's configurable for other sizes, so all these parameters should be adjustable in the OpenSCAD file. Please use descriptive variable names and comments. I don't have any other preference on libraries you choose to include, except if they're useful for your design.

[Assistant]
towa-spool.scad:
```
//width of the stickers
sticker_width=40.0; // [1:1:100]
//radius of the core of the sticker roll
spoolCore_radius = 27.5; // [15:100]
//width of the guide
guide_width = 10.0;
//height of the guide
guide_height = 32.5; // [100]
//slot to hold the stickers
slot_width=2.0; // [10:20]

// Towa Sticker Applikator
holeForAxle_radius = 27/2;

//Toleranzen
spoolCore_width=sticker_width+5.0; // +5mm für Trägerpapier

difference() {
    union(){
        cylinder(h=guide_width,r=guide_height+spoolCore_radius);
        translate([0,0,10])cylinder(h=spoolCore_width,r=spoolCore_radius);
    }
    union(){
        translate([0,0,-1])cylinder(h=guide_width+spoolCore_width+2, r=holeForAxle_radius);
        translate([-slot_width/2,0,guide_width])cube([slot_width,spoolCore_radius, spoolCore_width+2]);
    }
}
```