X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamentspool.scad;h=755916f2ffa721c369a69b0c6ca6e4289ca672fb;hp=b5baeaaf9161a0bf5b3c9e38704a34f3f80c1965;hb=7f35f108c8a9f7d69d147f1c8b2d8d91cf207cbb;hpb=7585601e67b0f91c3337ccca9e3c256c7fcf0e80

diff --git a/filamentspool.scad b/filamentspool.scad
index b5baeaa..755916f 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -1,7 +1,8 @@
 // -*- C -*-
 
-fdia=2.85;
-lightduty=true;
+fdia=2.85; // or 1.75
+lightduty=false; // or true
+
 
 slop=0.5;
 bigslop=slop*2;
@@ -11,7 +12,7 @@ function usedove() = selsz(true,true,false);
 
 num_arms = selsz(3,3,4);
 
-channelslop=selsz(slop,slop,slop);
+channelslop=selsz(slop,0.75,slop);
 
 exteffrad = 70;
 hubeffrad = selsz(30, 82, 40);
@@ -451,6 +452,138 @@ module FilamentCupPair(){ ////toplevel
     rotate([0,0,180]) FilamentCup();
 }
 
+//----- storarm -----
+
+storarm_hooklen = 8;
+storarm_hookheight = 5;
+storarm_thick = 10;
+storarm_axleslop = 4;
+
+storarm_base_w = 30;
+storarm_base_h = 100;
+storarm_base_d = 15;
+storarm_base_mind = 2;
+
+storarm_cope_hubaxle_mk1 = true;
+
+storarm_screw_hole = 4;
+storarm_screw_hole_slop = 0.5;
+storarm_besides_hole = 4;
+
+storarm_under_hole = 5;
+storarm_screw_hole_head = 8.8;
+storarm_screw_hole_head_slop = 1.5;
+
+// calculated
+
+storarm_axlerad = hubaxlerad - storarm_axleslop;
+storarm_mainlen = hubaxlelen*2 + storarm_axleslop
+  + (storarm_cope_hubaxle_mk1 ? 10 : 0);
+storarm_totlen = storarm_mainlen + storarm_hooklen;
+
+storarm_mid_off_y = storarm_axlerad;
+
+storarm_base_off_y = storarm_mid_off_y + storarm_base_h/2;
+
+module StorageArmDiagPartSide(xmin, xmax){
+  xsz = xmax-xmin;
+  yuse = storarm_thick/2;
+
+  intersection(){
+    translate([xmin-1, -storarm_axlerad, storarm_thick/2])
+      rotate([0,90,0])
+      cylinder(r=storarm_axlerad, h=xsz+2, $fn=60);
+    translate([xmin, -yuse, 0])
+      cube([xsz, yuse, storarm_thick]);
+  }
+}
+
+module StorageArmDiagPart(xmin, xmax, shear, adjbot){
+  hull(){
+    StorageArmDiagPartSide(xmin,xmax);
+
+    multmatrix([[1,0,0,0],
+		[shear,1,0,0],
+		[0,0,1,0],
+		[0,0,0,1]])
+      translate([0, -storarm_axlerad*2 + adjbot, 0])
+      mirror([0,1,0])
+      StorageArmDiagPartSide(xmin,xmax);
+  }
+}
+
+module StorageArmBaseTemplate(){
+  square([storarm_base_w, storarm_base_h]);
+}
+
+module StorageArmAtMountingHoles(){
+  bes = storarm_besides_hole + storarm_screw_hole;
+
+  x0 = bes;
+  x1 = storarm_base_w-bes;
+  y1 = storarm_base_h - bes;
+  y0 = bes;
+
+  for (pos=[ [x0, y1],
+	     [x1, y1],
+	     [x1, y0] ]) {
+    rotate([0,90,0])
+      translate([pos[0] - storarm_base_w,
+		 pos[1] - storarm_base_off_y, -storarm_base_d])
+      children();
+  }
+}
+
+module StorageArmRight(){ ////toplevel
+  shear = storarm_hookheight / (storarm_mainlen/2);
+
+  StorageArmDiagPart(-1, storarm_mainlen/2+1, shear, 0);
+  StorageArmDiagPart(storarm_mainlen/2-1, storarm_mainlen+1, shear/2,
+		     storarm_hookheight/2);
+
+  translate([0, storarm_hookheight, 0])
+    StorageArmDiagPart(storarm_mainlen, storarm_totlen,
+		       shear/2, -storarm_hookheight/2);
+
+  difference(){
+    union(){
+      hull(){
+	translate([-storarm_base_d, -storarm_base_off_y, storarm_base_w])
+	  rotate([0,90,0])
+	  linear_extrude(height=storarm_base_mind)
+	  StorageArmBaseTemplate();
+	StorageArmDiagPart(-1, 0, shear, 0);
+      }
+      StorageArmAtMountingHoles(){
+	cylinder(r= storarm_screw_hole_head/2,
+		 h=10);
+      }
+    }
+    StorageArmAtMountingHoles(){
+      translate([0,0,-1])
+	cylinder(r= (storarm_screw_hole + storarm_screw_hole_slop)/2 ,
+		 h=20);
+      translate([0,0,storarm_under_hole])
+	cylinder(r= (storarm_screw_hole_head + storarm_screw_hole_head_slop)/2,
+		 h=20);
+    }
+  }
+}
+
+module StorageArmLeft(){ ////toplevel
+  mirror([1,0,0]) StorageArmRight();
+}
+
+module StorArmHoleTest(){ ////toplevel
+  sz = storarm_screw_hole_head + storarm_besides_hole*2;
+  intersection(){
+    StorageArmRight();
+    translate([-50, -storarm_base_off_y, -1])
+      cube([100, sz, sz+1]);
+  }
+}
+
+
 module Demo(){
   translate([-hubeffrad-30,50,0]) Hub();
   ArmEnd();
@@ -467,4 +600,6 @@ module Demo(){
 //AxleWasher();
 //AxlePin();
 //AxleFrictionWasher();
+//StorageArmLeft();
+//StorArmHoleTest();
 //Demo();