X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=filamentspool.scad;h=b0c31ba95867d15f91901b2aaf30c24dcac02562;hb=255077bec953f95af72f25e60f71f12e3d899a62;hp=8af96483fd688feec764b8cf682b6d9a70456e72;hpb=c30615536b7e124336c7fb6d15fc7b78b7cb69b6;p=reprap-play.git

diff --git a/filamentspool.scad b/filamentspool.scad
index 8af9648..b0c31ba 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -465,10 +465,19 @@ 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 + (storarm_cope_hubaxle_mk1 ? 10 : 0);
+storarm_mainlen = hubaxlelen*2 + storarm_axleslop
+  + (storarm_cope_hubaxle_mk1 ? 10 : 0);
 storarm_totlen = storarm_mainlen + storarm_hooklen;
 
 storarm_mid_off_y = storarm_axlerad;
@@ -506,6 +515,24 @@ 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 StorageArm(){ ////toplevel
   shear = storarm_hookheight / (storarm_mainlen/2);
 
@@ -517,12 +544,41 @@ module StorageArm(){ ////toplevel
     StorageArmDiagPart(storarm_mainlen, storarm_totlen,
 		       shear/2, -storarm_hookheight/2);
 
-  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);
+  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]) StorageArm();
+}
+
+module StorArmHoleTest(){ ////toplevel
+  sz = storarm_screw_hole_head + storarm_besides_hole*2;
+  intersection(){
+    StorageArm();
+    translate([-50, -storarm_base_off_y, -1])
+      cube([100, sz, sz+1]);
   }
 }
 
@@ -543,5 +599,6 @@ module Demo(){
 //AxleWasher();
 //AxlePin();
 //AxleFrictionWasher();
-StorageArm();
+//StorageArm();
+//StorArmHoleTest();
 //Demo();