X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=quacks-ingredients-demos.scad;h=1f02c60877387a849aee05a866afc6097590d8f5;hb=ba7c5b240dcdab5fa3f4e3f7823bb828551471f0;hp=ecd031c6f537b1c065bb6bb9d283b78cdaedb22e;hpb=67327694838a91da0c601e8f6f8dc8d0605f8ca2;p=reprap-play.git

diff --git a/quacks-ingredients-demos.scad b/quacks-ingredients-demos.scad
index ecd031c..1f02c60 100644
--- a/quacks-ingredients-demos.scad
+++ b/quacks-ingredients-demos.scad
@@ -3,8 +3,8 @@
 include <quacks-ingredients.scad>
 
 sandingframe_gap = 0.3; // to be added to radius
-sandingframe_nw = 3;
-sandingframe_nl = 5;
+sandingframe_nw = 5;
+sandingframe_nl = 6;
 sandingframe_th = thick*2/3;
 
 module Demo(){ ////toplevel
@@ -15,18 +15,24 @@ module Demo(){ ////toplevel
 }
 
 module SandingFrame(){ ////toplevel
-  stride = token_dia + 5;
+  stridel = token_dia + 5;
   nl = sandingframe_nl;
   nw = sandingframe_nw;
+  stridew = stridel * cos(30);
+  stride = [stridel,stridew];
 
   linear_extrude(height = sandingframe_th) {
     difference(){
-      translate((token_dia/2 + stride) * 0.5 * [-1,-1])
-	square([ stride * (nl + 0.5),
-		 stride * 1.5 ]);
-      for (i = [0 : nl-1]) {
-	translate([ stride*i, 0 ])
-	  circle(r = token_dia/2 + sandingframe_gap);
+      translate((token_dia/2 + stridel) * 0.5 * [-1,-1])
+	square([ stridel * (nl + 0.5),
+		 stridew * nw + stridel * 0.5 ]);
+      for (j = [0 : nw-1]) {
+	eo = j % 2;
+	for (i = [0 : nl-1-0.5*eo]) {
+	  translate([stridel * (i + 0.5 * eo),
+		     stridew * j])
+	    circle(r = token_dia/2 + sandingframe_gap);
+	}
       }
     }
   }