mirror of
https://github.com/BelfrySCAD/BOSL2.git
synced 2024-12-29 00:09:41 +00:00
206 lines
7.1 KiB
OpenSCAD
206 lines
7.1 KiB
OpenSCAD
//////////////////////////////////////////////////////////////////////
|
|
// LibFile: constants.scad
|
|
// Useful Constants.
|
|
// Includes:
|
|
// include <BOSL2/std.scad>
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// Section: General Constants
|
|
|
|
// Constant: $slop
|
|
// Description:
|
|
// A number of printers, particularly FDM/FFF printers, tend to be a bit sloppy in their printing.
|
|
// This has made it so that some parts won't fit together without adding a bit of extra slop space.
|
|
// That is what the `$slop` value is for. The value for this will vary from printer to printer.
|
|
// By default, we use a value of 0.00 so that parts should fit exactly for resin and other precision
|
|
// printers. This value is measured in millimeters. When making your own parts, you should add
|
|
// `$slop` to both sides of a hole that another part is to fit snugly into. For a loose fit, add
|
|
// `2*$slop` to each side. This should be done for both X and Y axes. The Z axis will require a
|
|
// slop that depends on your layer height and bridging settings, and hole sizes. We leave that as
|
|
// a more complicated exercise for the user.
|
|
// DefineHeader(NumList): Calibration
|
|
// Calibration: To calibrate the `$slop` value for your printer, follow this procedure:
|
|
// Print the Slop Calibration part from the example below.
|
|
// Take the long block and orient it so the numbers are upright, facing you.
|
|
// Take the plug and orient it so that the arrow points down, facing you.
|
|
// Starting with the hole with the largest number in front of it, insert the small end of the plug into the hole.
|
|
// If you can insert and remove the small end of the plug from the hole without much force, then try again with the hole with the next smaller number.
|
|
// Repeat step 5 until you have found the hole with the smallest number that the plug fits into without much force.
|
|
// The correct hole should hold the plug when the long block is turned upside-down.
|
|
// The number in front of that hole will indicate the `$slop` value that is ideal for your printer.
|
|
// Remember to set that slop value in your scripts after you include the BOSL2 library: ie: `$slop = 0.15;`
|
|
// Example(3D,Med): Slop Calibration Part.
|
|
// min_slop = 0.00;
|
|
// slop_step = 0.05;
|
|
// holes = 8;
|
|
// holesize = [15,15,15];
|
|
// height = 20;
|
|
// gap = 5;
|
|
// l = holes * (holesize.x + gap) + gap;
|
|
// w = holesize.y + 2*gap;
|
|
// h = holesize.z + 5;
|
|
// diff("holes")
|
|
// cuboid([l, w, h], anchor=BOT) {
|
|
// for (i=[0:holes-1]) {
|
|
// right((i-holes/2+0.5)*(holesize.x+gap)) {
|
|
// s = min_slop + slop_step * i;
|
|
// tags("holes") {
|
|
// cuboid([holesize.x + 2*s, holesize.y + 2*s, h+0.2]);
|
|
// fwd(w/2-1) xrot(90) linear_extrude(1.1) {
|
|
// text(
|
|
// text=fmt_fixed(s,2),
|
|
// size=0.4*holesize.x,
|
|
// halign="center",
|
|
// valign="center"
|
|
// );
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
// back(holesize.y*2.5) {
|
|
// difference() {
|
|
// union() {
|
|
// cuboid([holesize.x+10, holesize.y+10, 15], anchor=BOT);
|
|
// cuboid([holesize.x, holesize.y, 15+holesize.z], anchor=BOT);
|
|
// }
|
|
// up(3) fwd((holesize.y+10)/2) {
|
|
// prismoid([holesize.x/2,1], [0,1], h=holesize.y-6);
|
|
// }
|
|
// }
|
|
// }
|
|
// Example(2D): Where to add `$slop` gaps.
|
|
// $slop = 0.2;
|
|
// difference() {
|
|
// square([20,12],center=true);
|
|
// back(3) square([10+2*$slop,11],center=true);
|
|
// }
|
|
// back(8) {
|
|
// rect([15,5],anchor=FWD);
|
|
// rect([10,8],anchor=BACK);
|
|
// }
|
|
// color("#000") {
|
|
// arrow_path = [[5.1,6.1], [6.0,7.1], [8,7.1], [10.5,10]];
|
|
// xflip_copy()
|
|
// stroke(arrow_path, width=0.3, endcap1="arrow2");
|
|
// xcopies(21) back(10.5) {
|
|
// back(1.8) text("$slop", size=1.5, halign="center");
|
|
// text("gap", size=1.5, halign="center");
|
|
// }
|
|
// }
|
|
$slop = 0.0;
|
|
|
|
|
|
// Constant: INCH
|
|
// Description:
|
|
// The number of millimeters in an inch.
|
|
INCH = 25.4;
|
|
|
|
|
|
|
|
// Section: Directional Vectors
|
|
// Vectors useful for `rotate()`, `mirror()`, and `anchor` arguments for `cuboid()`, `cyl()`, etc.
|
|
|
|
// Constant: LEFT
|
|
// Description: Vector pointing left. [-1,0,0]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=LEFT);
|
|
LEFT = [-1, 0, 0];
|
|
|
|
// Constant: RIGHT
|
|
// Description: Vector pointing right. [1,0,0]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=RIGHT);
|
|
RIGHT = [ 1, 0, 0];
|
|
|
|
// Constant: FRONT
|
|
// Description: Vector pointing forward. [0,-1,0]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=FRONT);
|
|
FRONT = [ 0, -1, 0];
|
|
|
|
// Constant: BACK
|
|
// Description: Vector pointing back. [0,1,0]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=BACK);
|
|
BACK = [ 0, 1, 0];
|
|
|
|
// Constant: BOTTOM
|
|
// Description: Vector pointing down. [0,0,-1]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=BOTTOM);
|
|
BOTTOM = [ 0, 0, -1];
|
|
|
|
// Constant: TOP
|
|
// Description: Vector pointing up. [0,0,1]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=TOP);
|
|
TOP = [ 0, 0, 1];
|
|
|
|
// Constant: ALLPOS
|
|
// Description: Vector pointing right, back, and up. [1,1,1]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=ALLPOS);
|
|
ALLPOS = [ 1, 1, 1]; // Vector pointing X+,Y+,Z+.
|
|
|
|
// Constant: ALLNEG
|
|
// Description: Vector pointing left, forwards, and down. [-1,-1,-1]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=ALLNEG);
|
|
ALLNEG = [-1, -1, -1]; // Vector pointing X-,Y-,Z-.
|
|
|
|
// Constant: CENTER
|
|
// Description: Zero vector. Centered. [0,0,0]
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=CENTER);
|
|
CENTER = [ 0, 0, 0]; // Centered zero vector.
|
|
|
|
|
|
// Section: Vector Aliases
|
|
// Useful aliases for use with `anchor`.
|
|
|
|
// Constant: CTR
|
|
// Description: Zero vector. Centered. `[0,0,0]`. Alias to `CENTER`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=CTR);
|
|
CTR = CENTER;
|
|
|
|
// Constant: UP
|
|
// Description: Vector pointing up. [0,0,1] Alias to `TOP`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=UP);
|
|
UP = TOP; // Vector pointing up, alias to `TOP`.
|
|
|
|
// Constant: DOWN
|
|
// Description: Vector pointing down. [0,0,-1] Alias to `BOTTOM`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=DOWN);
|
|
DOWN = BOTTOM; // Vector pointing down, alias to `BOTTOM`.
|
|
|
|
// Constant: BTM
|
|
// Description: Vector pointing down. [0,0,-1] Alias to `BOTTOM`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=BTM);
|
|
BTM = BOTTOM; // Vector pointing down, alias to `BOTTOM`.
|
|
|
|
// Constant: BOT
|
|
// Description: Vector pointing down. [0,0,-1] Alias to `BOTTOM`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=BOT);
|
|
BOT = BOTTOM; // Vector pointing down, alias to `BOTTOM`.
|
|
|
|
// Constant: FWD
|
|
// Description: Vector pointing forward. [0,-1,0] Alias to `FRONT`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=FWD);
|
|
FWD = FRONT; // Vector pointing forward, alias to `FRONT`.
|
|
|
|
// Constant: FORWARD
|
|
// Description: Vector pointing forward. [0,-1,0] Alias to `FRONT`.
|
|
// Example(3D): Usage with `anchor`
|
|
// cuboid(20, anchor=FORWARD);
|
|
FORWARD = FRONT; // Vector pointing forward, alias to `FRONT`.
|
|
|
|
|
|
// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
|