slop=0.5;
bigslop=slop*2;

prongthick=5;
prongwidth=5;
ratchetstep=15;
ratchettooth=3;
ratchettoothheight=5;
ratchettoothsmoothr=1;
ratchettoothslope=0.75;
overlap=0.5;

armendwallthick=2.5;
armendbasethick=1.2;

ratchetpawl=ratchetstep-ratchettooth-bigslop*2;

include <doveclip.scad>

channelwidth = prongthick + slop;
channeldepth = prongwidth + ratchettoothheight;
totalwidth = armendwallthick*2 + channelwidth;
totalheight = channeldepth + armendbasethick;

doveclipheight = totalheight;

module ArmEnd(length=120){
  translate([ratchettoothsmoothr, channelwidth/2, -armendbasethick]) {
    rotate([0,0,-90])
      DoveClipPairBase(h=doveclipheight);
  }

  for (dx = [0 : ratchetstep : length]) translate([dx,0,0]) {
    difference(){
      translate([0, -armendwallthick, -armendbasethick])
	cube([ratchetstep+overlap, totalwidth, totalheight]);
      translate([-1, 0, 0])
	cube([ratchetstep+overlap+2, channelwidth, channeldepth+1]);
    }
    translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
      rotate([90,0,0])
	cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
      multmatrix([	[	1, 0, ratchettoothslope, 0	],
			[	0,	1,	0,	0	],
			[	0,	0,	1,	0	],
			[	0,	0,	0,	1	]])
	cube([ratchettooth - ratchettoothsmoothr*2,
	      channelwidth, ratchettoothheight]);
    }
  }
}

module FilamentHandle(stalklength=50){
  pawlusewidth = ratchetpawl-ratchettoothsmoothr*2;
  mirror([0,1,0]) {
    cube([stalklength, prongwidth, prongthick]);
    translate([ratchettoothsmoothr, prongwidth, 0]) {
      minkowski(){
	cylinder($fn=20,r=ratchettoothsmoothr, h=1);
	multmatrix([	[	1, -ratchettoothslope, 0, 0	],
			[	0,	1,	0,	0	],
			[	0,	0,	1,	0	],
			[	0,	0,	0,	1	]])
	  cube([pawlusewidth,
		ratchettoothheight - ratchettoothsmoothr,
		prongthick]);
      }
    }
  }
}

//ArmEnd();
FilamentHandle();