X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=tube-crossdrill-jig.scad;h=5619e93eb649a86b1a4d34be12698bc6ec5a826e;hb=78701ddb56c37f9f319a1cd6af93d08e06c67c2c;hp=4293f5b002c7c82c7d0d96a227a01cfcf5de04a3;hpb=68db526e08029c68a07ad685459fb83c9bd52d62;p=reprap-play.git

diff --git a/tube-crossdrill-jig.scad b/tube-crossdrill-jig.scad
index 4293f5b..5619e93 100644
--- a/tube-crossdrill-jig.scad
+++ b/tube-crossdrill-jig.scad
@@ -1,29 +1,44 @@
 // -*- C -*-
 
+//$fs=0.1;
+//$fa=3;
+$fs=0.2;
+$fa=6;
+
 rearwallthick = 3;
 basethick = 3;
 mainframeendthick = 2.5;
 
-tubedia=16;
+tubedia = 16 + 0.8;
 tubetubethick=2;
 tubetubetopslop=1;
 
 boltholedia = 6.5 + 0.5;
+boltholeslotshorter = 6;
+mainframeholedia = 5 + 0.5;
 
 // "slot" refers to the things in the base of the drill press stand
 backslotedgespace = 71;
 slotwidth = 11.5;
 backslotmid2screwhole = 17;
 slotplugheight = 5.5;
-slotplugdepth = 10;
+slotplugshorterlen = 8;
+slotpluglongerlen = 18;
+
+slotslope = 11.0 / 18.5;
 
 // "keepslot" refers to the screws in the wooden jig block
 keepslotstartz = 20;
 keepslotlen = 25;
+keepslotx = backslotedgespace / 2;
+keepslotwidth = 4;
 
 mainframeextraside = 15;
 mainframeextrafront = 25;
 
+rearwallstrengthwidth = 10;
+keepslotclear = 10;
+
 // computed values
 
 mainframeholex = backslotedgespace/2 + slotwidth/sqrt(2) +
@@ -35,6 +50,14 @@ mainframemaxx = mainframeholex + mainframeextraside;
 mainframeminy = mainframeholey - mainframeextrafront;
 mainframemaxz = keepslotstartz + keepslotlen;
 
+slotslopediag = sqrt(1 + slotslope*slotslope);
+slotwidthx = slotwidth * slotslopediag;
+
+slotxperlen = slotslope / slotslopediag;
+slotyperlen =         1 / slotslopediag;
+
+echo(slotslope, slotslopediag, slotwidthx);
+
 module MainFrame(){
   for (m=[0,1]) {
     mirror([m,0,0]) {
@@ -42,21 +65,31 @@ module MainFrame(){
 	cube([mainframemaxx+1, -mainframeminy, basethick]);
       translate([-1, -rearwallthick, 0])
 	cube([mainframemaxx+1, rearwallthick, mainframemaxz]);
-      translate([mainframemaxx,0,0])
-	rotate([90,0,-90])
-	linear_extrude(height=mainframeendthick)
-	polygon([[-mainframeminy, 0],
-		 [0, mainframemaxz],
-		 [0, 0]]);
+
+      for (x=[keepslotx - keepslotclear, mainframemaxx - 0.5]) {
+	translate([x,0,0])
+	  rotate([90,0,-90])
+	  linear_extrude(height=mainframeendthick)
+	  polygon([[-mainframeminy, 0],
+		   [0, mainframemaxz],
+		   [0, 0]]);
+      }
 
       translate([backslotedgespace/2, 0, 1])
 	mirror([0,0,1])
 	linear_extrude(height=slotplugheight+1)
 	polygon([[0,0],
-		 [slotwidth * sqrt(2), 0],
-		 [slotplugdepth / sqrt(2) + slotwidth * sqrt(2),
-		  -slotplugdepth],
-		 [slotplugdepth / sqrt(2), -slotplugdepth]]);
+		 [slotwidthx, 0],
+		 [slotwidthx + slotplugshorterlen * slotxperlen,
+		  -slotplugshorterlen * slotyperlen],
+		 [slotpluglongerlen * slotxperlen,
+		  -slotpluglongerlen * slotyperlen]]);
+      translate([-1,
+		 -rearwallthick - boltholeslotshorter + 0.2,
+		 tubedia + tubetubetopslop + tubetubethick + 4])
+	cube([keepslotx - keepslotclear + 1,
+	      boltholeslotshorter + 0.5,
+	      rearwallstrengthwidth]);
     }
   }
 }
@@ -82,9 +115,17 @@ module Jig(){
       translate([0,0,-0.1])
 	TubeThing(10, tubedia, 0, 5);
       translate([-boltholedia/2, mainframeminy - 1, -5])
-	cube([boltholedia, -mainframeminy + 1 - rearwallthick - 0.1,
+	cube([boltholedia,
+	      -mainframeminy + 1 - rearwallthick - boltholeslotshorter,
 	      mainframemaxz + 10]);
       for (m=[0,1]) {
+	mirror([m,0,0]) {
+	  translate([mainframeholex, mainframeholey, -30])
+	    cylinder(h=basethick+40, r=mainframeholedia/2);
+	  translate([keepslotx - keepslotwidth/2,
+		     -10, keepslotstartz])
+	    cube([keepslotwidth, 20, keepslotlen + 10]);
+	}
       }
     }
   }
@@ -93,4 +134,5 @@ module Jig(){
 //MainFrame();
 //TubeThing(0, tubedia);
 
-Jig();
+rotate([-90,0,0])
+  Jig();