belt-slot-cut-jig: onejig in progress

[reprap-play.git] / belt-slot-cut-jig.scad

diff --git a/belt-slot-cut-jig.scad b/belt-slot-cut-jig.scad
index 3f59f9725d7f74255b23208b41528d9eb579ec5d..4ff14f1f66864431d1b166fec38884482d289e50 100644 (file)
--- a/belt-slot-cut-jig.scad
+++ b/belt-slot-cut-jig.scad
@@ -1,5 +1,116 @@
 // -*- C -*-
 
+crewpunch_slop = 0.3;
+
+holder_min_wall = 2;
+
+holder_attach_xsz = 5;
+holder_ctie_width = 4.0 + 0.5;
+holder_ctie_thick = 2.0 + 0.5;
+holder_attach_walls = 3;
+holder_attach_roof = 2.5;
+
+jig_interval = 25;
+strap_width = 25;
+edgewall_width = 3;
+
+main_slop = 0.5;
+
+// from careful measurement
+
+crewpunch_shape =
+  [[  6, [0.6, 6.0], [1.6, 12.3] ],
+   [  8, [1.1, 6.2], [1.9, 12.5] ],
+   [ 10, [1.6, 6.5], [2.1, 12.8] ],
+   [ 12, [1.8, 6.6], [2.3, 12.7] ],
+   [ 14, [2.1, 6.8], [2.6, 13.0] ],
+   [ 16, [2.4, 6.9], [2.7, 13.2] ]];
+
+crewpunch_shaft_max_y = 7.5;
+
+crewpunch_systematic_size_error = +0.36;
+
+crewpunch_min_y = 4.7 - crewpunch_systematic_size_error;
+
+crewpunch_smallest_shape = crewpunch_shape[0];
+crewpunch_biggest_shape = crewpunch_shape[len(crewpunch_shape)-1];
+
+// computed
+
+attach_ysz = holder_attach_walls*2 + holder_ctie_width;
+holder_front_wall = crewpunch_shaft_max_y - crewpunch_biggest_shape[1][1]
+  + attach_ysz;
+
+holder_block_zsz = crewpunch_biggest_shape[0] - crewpunch_smallest_shape[0];
+holder_xsz = crewpunch_biggest_shape[2][0] + crewpunch_biggest_shape[2][1] +
+  holder_min_wall*2;
+crewpunch_biggest_y =
+  crewpunch_biggest_shape[1][0] + crewpunch_biggest_shape[1][1];
+holder_ysz = crewpunch_biggest_y + holder_min_wall + holder_front_wall;
+
+attach_offset = holder_attach_xsz + holder_min_wall;
+
+// objects
+
 module CrewPunch(){
-  
+  ourslop = crewpunch_slop - crewpunch_systematic_size_error;
+  hull(){
+    for(layer=crewpunch_shape){
+      translate([0,0, layer[0]]){
+       for(xind=[0,1]) //translate([xind?0:1,0,0])
+         for(yind=[0,1]) //translate([0,yind?0.5:0,0])
+           mirror([xind?1:0,0,0]) mirror([0,yind?0:1,0]){
+             translate([-0.1,-0.1,-0.1])
+               cube([0.1 + layer[2][xind] + ourslop,
+                     0.1 + layer[1][yind] + ourslop,
+                     0.2]);
+           }
+      }
+    }
+  }
+}
+
+module PunchHolder(cutouts=true){
+  translate([-holder_xsz/2,
+            -holder_ysz + holder_min_wall + crewpunch_biggest_y/2,
+            0]){
+    difference(){
+      translate([0,attach_offset,0])
+       cube([holder_xsz, holder_ysz - attach_offset, holder_block_zsz]);
+      if (cutouts)
+       translate([crewpunch_biggest_shape[2][1] + holder_min_wall,
+                  crewpunch_biggest_shape[1][0] + holder_front_wall,
+                  -crewpunch_smallest_shape[0]])
+         CrewPunch();
+    }
+    difference(){
+      translate([holder_xsz/2 - holder_attach_xsz/2, 0, 0])
+       cube([holder_attach_xsz,
+             attach_ysz,
+             holder_block_zsz + holder_ctie_thick + holder_attach_roof + 1]);
+      if (cutouts)
+       translate([-30, holder_attach_walls, holder_block_zsz + 0.1])
+         cube([60, holder_ctie_width, holder_ctie_thick]);
+    }
+  }
+}
+
+module OneJig(){
+  difference(){
+    translate([-(jig_interval/2 + 1),
+              -(strap_width/2 + edgewall_width) - attach_offset,
+              0])
+      cube([jig_interval + 2,
+           strap_width + edgewall_width*2 + attach_offset,
+           holder_ysz]);
+    minkowski(){
+      cube([main_slop*2, main_slop*2, 50], center=true);
+      PunchHolder(false);
+    }
+  }
 }
+       
+//CrewPunch();
+//PunchHolder();
+//PunchHolder(false);
+OneJig();