tube-crossdrill-jig: sort out slot plug shape

[reprap-play.git] / tube-crossdrill-jig.scad

diff --git a/tube-crossdrill-jig.scad b/tube-crossdrill-jig.scad
index 971c5689bfbfc893337f490fdcd2dc070517716f..5619e93eb649a86b1a4d34be12698bc6ec5a826e 100644 (file)
--- a/tube-crossdrill-jig.scad
+++ b/tube-crossdrill-jig.scad
@@ -1,14 +1,20 @@
 // -*- 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
@@ -16,7 +22,10 @@ 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;
@@ -27,6 +36,9 @@ keepslotwidth = 4;
 mainframeextraside = 15;
 mainframeextrafront = 25;
 
+rearwallstrengthwidth = 10;
+keepslotclear = 10;
+
 // computed values
 
 mainframeholex = backslotedgespace/2 + slotwidth/sqrt(2) +
@@ -38,6 +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]) {
@@ -45,21 +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]);
     }
   }
 }
@@ -86,7 +116,7 @@ module Jig(){
        TubeThing(10, tubedia, 0, 5);
       translate([-boltholedia/2, mainframeminy - 1, -5])
        cube([boltholedia,
-             -mainframeminy + 1 - rearwallthick - 0.1,
+             -mainframeminy + 1 - rearwallthick - boltholeslotshorter,
              mainframemaxz + 10]);
       for (m=[0,1]) {
        mirror([m,0,0]) {
@@ -104,4 +134,5 @@ module Jig(){
 //MainFrame();
 //TubeThing(0, tubedia);
 
-Jig();
+rotate([-90,0,0])
+  Jig();