OpenSCAD source code: MPCNC Tool Length Probe Station with endstop switch PCB

Tool Length Probe Station.scad

// MPCNC Tool Length Probe Station
// Ed Nisley KE4ZNU - 2017-12-08

/* [Extrusion] */

ThreadThick = 0.25;       // [0.20, 0.25]
ThreadWidth = 0.40;       // [0.40]

function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);

/* [Hidden] */

Protrusion = 0.1;        // [0.01, 0.1]

HoleWindage = 0.2;

/* [Sizes] */

EndstopPCB = [40.0,16.5,1.6];           // endstop PCB
ComponentHeight = 6.0;                  // max component height above PCB

SwitchOffset = [35.0,21.0,4.75];        // touch point center from lower left PCB corner
SwitchTravel = 2.5;                     // first touch to switch actuation

TapeThick = 1.0;                        // foam mounting tape

WallThick = 4.0;                        // basic wall & floor thickness

BaseRadius = 5.0;

Base = [IntegerMultiple(EndstopPCB[0] + 2*BaseRadius,20),
        IntegerMultiple(EndstopPCB[2] + TapeThick + WallThick + 2*BaseRadius,2*25),
        2.0];

NumSides = 8*4;

TextDepth = 2*ThreadThick;

//- Build it

union() {
  difference() {
    hull()
      for (i=[-1,1], j=[-1,1])
        translate([i*(Base[0]/2 - BaseRadius),j*(Base[1]/2 - BaseRadius),0])
          resize([0,0,Base[2]])
            intersection() {
              cylinder(r=BaseRadius,h=BaseRadius,$fn=NumSides);
              sphere(r=BaseRadius,$fn=NumSides);
          }
    translate([0,0,Base[2] - TextDepth])
      linear_extrude(height=TextDepth + Protrusion) {
        translate([0,-10,0])
          text(text="MPCNC",size=8,spacing=1.05,font="Arial:style=Bold",halign="center");
        translate([0,-18,0])
          text(text="Tool Probe",size=6,spacing=1.05,font="Arial:style=Regular",halign="center");
      }

  }
  translate([0,
             WallThick/2 + TapeThick + SwitchOffset[2],
             (EndstopPCB[1] - Protrusion)/2 + Base[2]])
    cube([EndstopPCB[0],WallThick,EndstopPCB[1] + Protrusion],center=true);

}

More details on my blog at https://wp.me/poZKh-7dt