X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=screw-recess-test.scad;h=576c21682b508c0749edfa93a63211b30ff0121a;hb=90423897e1297d5b35bc6a5a5d328e8d310ed83b;hp=2e4fb5ced435cb0a3c5f540c2132f50f4f484e83;hpb=2dc84836b06a8aa771dd7a0df65ccf230f8c0eaa;p=reprap-play.git

diff --git a/screw-recess-test.scad b/screw-recess-test.scad
index 2e4fb5c..576c216 100644
--- a/screw-recess-test.scad
+++ b/screw-recess-test.scad
@@ -2,30 +2,43 @@
 
 cubez = 12;
 
-shaftdia = 4 + 0.5;
-recessdia = 10 + 1.0;
-
 shaftz = cubez;
-recessz = 5;
 
-recesstopz = recessz + 0.5*recessdia + 0.1;
-xblocky = shaftdia + 0.1;
+tests = [[4 + 0.5,  10 + 1.0]];
 
-cubexy = recessdia + 10;
+cubexy = 20;
 
-module RecessCylinder(h){
-  translate([0,0,-1]) cylinder(r=recessdia/2, h=h+1, $fn=40);
+module RecessScrewCutout_RecessCylinder(recessdia,zbelow, h){
+  translate([0,0,-zbelow]) cylinder(r=recessdia/2, h=h+1, $fn=40);
 }
 
-module Hole(){
-  translate([0,0,-1]) cylinder(r=shaftdia/2, h=shaftz+2, $fn=20);
-  RecessCylinder(recessz);
+RecessedScrewCutout_defaultrecessdepth_flat = -0.35;
+RecessedScrewCutout_defaultrecessdepth_hex = -0.70;
+
+function RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg) =
+  recessdepth_arg >= 0 ? recessdepth_arg : -recessdepth_arg * recessdia;
+
+function RecessedScrewCutout_totaldepth(recessdia, recessdepth_arg) =
+  RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg) +
+  + 0.5*recessdia + 0.1;
+
+module RecessedScrewCutout(shaftdia, recessdia, shaftlen,
+        zbelow=1,
+        recessdepth_arg=RecessedScrewCutout_defaultrecessdepth_flat) {
+  // pass recessdepth_arg=-1 for the default for flat heads
+  // pass recessdepth_arg=-1 for the default for flat heads
+  recessdepth = RecessedScrewCutout_recessdepth(recessdia, recessdepth_arg);
+  recesstopz = RecessedScrewCutout_totaldepth(recessdia, recessdepth_arg);
+  xblocky = shaftdia + 0.1;
+
+  translate([0,0,-zbelow]) cylinder(r=shaftdia/2, h=shaftlen+zbelow, $fn=20);
+  RecessScrewCutout_RecessCylinder(recessdia,zbelow, recessdepth);
   intersection(){
-    translate([-recessdia*1.5, -xblocky/2, -1])
-      cube([recessdia*3, xblocky, recesstopz+3]);
+    translate([-recessdia*1.5, -xblocky/2, -zbelow])
+      cube([recessdia*3, xblocky, recesstopz+2+zbelow]);
     translate([0, -recessdia, recesstopz])
       rotate([0,135,0]) cube([recessdia, recessdia*2, 10]);
-    RecessCylinder(recesstopz+1);
+    RecessScrewCutout_RecessCylinder(recessdia,zbelow, recesstopz+1);
   }
 }
 
@@ -33,9 +46,14 @@ module Test(){
   difference(){
     translate([-cubexy/2, -cubexy/2, 0])
       cube([cubexy,cubexy,cubez]);
-    Hole();
   }
 }
 
-Test();
-//Hole();
+module Hole(){
+    RecessedScrewCutout(tests[0][0],
+			tests[0][1],
+			shaftz+1);
+}
+
+//Test();
+Hole();