X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=tube-crossdrill-jig.scad;h=843a2a697123c8e10d87a0f882991cb80da2d8c2;hp=13b097cb488e3c4e9dc6907d57b2274a2ec80317;hb=a7b0012d1b9a146acf75048f1ffabca654ce3e79;hpb=296e251afd30ce87c9524f6fff9a01c38b6ca3e1

diff --git a/tube-crossdrill-jig.scad b/tube-crossdrill-jig.scad
index 13b097c..843a2a6 100644
--- a/tube-crossdrill-jig.scad
+++ b/tube-crossdrill-jig.scad
@@ -1,10 +1,12 @@
 // -*- C -*-
 
-$fs=0.1;
-$fa=3;
+//$fs=0.1;
+//$fa=3;
+$fs=0.2;
+$fa=6;
 
 rearwallthick = 3;
-basethick = 3;
+basethick = 2;
 mainframeendthick = 2.5;
 
 tubedia = 16 + 0.8;
@@ -13,33 +15,44 @@ tubetubetopslop=1;
 
 boltholedia = 6.5 + 0.5;
 boltholeslotshorter = 6;
-mainframeholedia = 5 + 0.5;
+mainframeholedia = 5 + 1.0;
 
 // "slot" refers to the things in the base of the drill press stand
-backslotedgespace = 71;
-slotwidth = 11.5;
+backslotedgespace = 59;
+slotwidth = 11.5 - 0.5;
 backslotmid2screwhole = 17;
 slotplugheight = 5.5;
-slotplugdepth = 10;
+slotplugshorterlen =10;
+slotpluglongerlen = 20;
+
+//slotslope = 11.0 / 18.5;
+slotslope = 1 / tan(51);
 
 // "keepslot" refers to the screws in the wooden jig block
 keepslotstartz = 20;
-keepslotlen = 25;
+keepslotlen = 18;
 keepslotx = backslotedgespace / 2;
 keepslotwidth = 4;
 
-mainframeextraside = 15;
-mainframeextrafront = 25;
+mainframeextraside = 12;
+mainframeextrafront = 15;
 
 rearwallstrengthwidth = 10;
 keepslotclear = 10;
 
 // computed values
 
-mainframeholex = backslotedgespace/2 + slotwidth/sqrt(2) +
-  backslotmid2screwhole / sqrt(2);
+slotslopediag = sqrt(1 + slotslope*slotslope);
+slotwidthx = slotwidth * slotslopediag;
+
+slotxperlen = slotslope / slotslopediag;
+slotyperlen =         1 / slotslopediag;
+
+mainframeholex = backslotedgespace/2 + slotpluglongerlen * slotxperlen
+  + 0.5 * slotwidth * slotyperlen;
 
-mainframeholey = -backslotmid2screwhole / sqrt(2);
+mainframeholey = -slotpluglongerlen * slotyperlen
+  + 0.5 * slotwidth * slotxperlen;
 
 mainframemaxx = mainframeholex + mainframeextraside;
 mainframeminy = mainframeholey - mainframeextrafront;
@@ -66,10 +79,11 @@ module MainFrame(){
 	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])