X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=filamentspool.scad;h=94a01504072b756b6edfe5a78ed7664914e82b42;hb=9ffb15b0eaf47f02691e9166c08f453f3cefea10;hp=7c2434e32b4ed5b369ff559810c9f9570880b1fd;hpb=c41ff015f10346f1b8404e83e39f5b58ec762bd2;p=reprap-play.git

diff --git a/filamentspool.scad b/filamentspool.scad
index 7c2434e..94a0150 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -1,5 +1,6 @@
 
 slop=0.5;
+bigslop=slop*2;
 
 prongthick=5;
 prongwidth=5;
@@ -9,30 +10,40 @@ ratchettoothheight=5;
 ratchettoothsmoothr=1;
 ratchettoothslope=0.75;
 overlap=0.5;
+cupbigrad=35;
+
+stalklength=40;
+overclipcupgap=5;
+overclipheight=15;
 
 armendwallthick=2.5;
 armendbasethick=1.2;
 
+ratchetpawl=ratchetstep-ratchettooth-bigslop*2;
+
 include <doveclip.scad>
+include <cliphook.scad>
 
-module ArmEnd(length=120){
-  channelwidth = prongthick + slop;
-  channeldepth = prongwidth + ratchettoothheight;
-  totalwidth = armendwallthick*2 + channelwidth;
-  totalheight = channeldepth + armendbasethick;
+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=totalheight);
+      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]);
-    }
+  difference(){
+    translate([0, -armendwallthick, -armendbasethick])
+      cube([length, totalwidth, totalheight]);
+    translate([-1, 0, 0])
+      cube([length+2, channelwidth, channeldepth+1]);
+  }
+  for (dx = [0 : ratchetstep : length - stalklength]) translate([dx,0,0]) {
     translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
       rotate([90,0,0])
 	cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
@@ -46,4 +57,59 @@ module ArmEnd(length=120){
   }
 }
 
-ArmEnd();
+module FilamentCupHandle(){
+  pawlusewidth = ratchetpawl-ratchettoothsmoothr*2;
+  mirror([0,1,0]) {
+    cube([stalklength, prongwidth, prongthick]);
+    translate([stalklength, prongwidth/2, 0])
+      cylinder(r=prongwidth/2, h=prongthick, $fn=20);
+    translate([ratchettoothsmoothr, prongwidth, 0]) {
+      minkowski(){
+	cylinder($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]);
+      }
+    }
+  }
+}
+
+module FilamentCupCup(){
+  xstraight = cupbigrad;
+  linear_extrude(height=prongthick) {
+    FlatArc(0,0, cupbigrad,cupbigrad+prongwidth, 89,271, $fn=80);
+  }
+  for (my=[0,1]) mirror([0,my,0]) {
+    translate([0,cupbigrad,0])
+      cube([xstraight, prongwidth, prongthick]);
+  }
+}
+
+module FilamentCup() {
+  FilamentCupHandle();
+
+  dx = cupbigrad + prongwidth;
+  dy = cupbigrad + prongwidth + overclipcupgap;
+
+  translate([dx, dy, 0])
+    FilamentCupCup();
+  translate([0, -1, 0]);
+  cube([prongwidth, dy+1, prongthick]);
+
+  propshift = stalklength - overclipheight - prongthick;
+  proptaken = propshift + prongthick;
+  echo(cupbigrad, dx, propshift, proptaken);
+
+  translate([propshift, -1, 0])
+    cube([prongwidth,
+	  sqrt(cupbigrad*cupbigrad - proptaken*proptaken)
+	  + overclipcupgap + prongthick + 1,
+	  prongthick]);
+}
+
+//ArmEnd();
+FilamentCup();