X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamenttrestle.scad;h=62b6994998e116fc053b070d3e6a389587689b41;hp=9d9e41f6a54000a16213061ee07c1b10a9804850;hb=5f2a0e53888f73409334f95972330c0d96376df4;hpb=47469cebb4ff8384aae1fb2f7ed2154b8ea08405

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 9d9e41f..62b6994 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -1,18 +1,32 @@
 // -*- C -*-
 
 spoolwidth = 80; // fixme needs to be measured
-trestleheight = 80; // fixme needs to be checked
-trestlebase = 80; // fixme needs to be checked
+spoolinnerrad = 25; // fixme needs to be checked
+spoolouterrad = 60; // fixme needs to be checked
 
 include <doveclip.scad>
+include <axlepin.scad>
 
-spoolwidthgap = 2;
-barrady = 5;
-barradz = 7;
-guidewidth = 3;
-guiderad = 20;
+spoolradclear = 10;
+spoolradslop = 2;
 
-plugl = 12;
+spoolinnerslop = 2;
+axleslop = 0.5;
+
+axlerad = 7;
+barwasherrad = 17;
+
+hubbasethick = 6;
+hubmainthick = 20;
+hubbaseweb = 2;
+hubbasestalkwidth = 6;
+hubwalls = 3;
+hubpillarw = 4;
+hubbaserad = spoolinnerrad + 15;
+hubmainrad = spoolinnerrad - spoolradslop;
+
+legw = 12;
+plugl = 20;
 plugwmin = 3;
 plugh = 10;
 plugslope = 0.5;
@@ -23,59 +37,89 @@ trestlebaseh = 10;
 trestleplugd = 1;
 
 topblockthick = 4;
-topblockbasedepth = 4;
+topblockbasedepth = 5;
+
+pinbasew = 5.0;
+pinminh = 1.5;
+pinmaxh = 4.5;
+pindh = 0.50;
+pindwidth = 0.75;
 
-pinbasew = 3;
-pinminh = 1.0;
-pinmaxh = 3;
-pindh = 1.0;
-pindwidth = 1.0;
+pintaperlen = plugwmax * 0.85;
+pinstraightlen = 10;
+
+spoolouterpad = AxlePin_holerad()*2 * 1.5;
+spoolbarlen = spoolwidth +
+  2*(Washer_thick() + hubbasethick + AxlePin_holerad()
+     + spoolinnerslop + spoolouterpad);
+  barz = axlerad * 0.5;
+axlepin_x = spoolwidth/2 + hubbasethick +
+  Washer_thick() + spoolinnerslop + AxlePin_holerad()*0.5;
+
+trestleheight = spoolouterrad + spoolradclear - barz;
+trestlebase = trestleheight * 1.2;
 
 module Plug(d=0){
   dw = d;
   dh = d;
+  dhb = d*2;
   a = atan(plugslope);
-  bdx = dw / cos(a);
+  bdy = -dhb;
+  bdx = dw / cos(a) + bdy * plugslope;
   tdy = dh;
-  tdx = bdx + dh * plugslope;
+  tdx = bdx + tdy * plugslope;
   translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
-    polygon([[-(plugwmin/2 + bdx),  0],
+    polygon([[-(plugwmin/2 + bdx),  bdy],
 	     [-(plugwmax/2 + tdx),  plugh + tdy],
 	     [+(plugwmax/2 + tdx),  plugh + tdy],
-	     [+(plugwmin/2 + bdx),  0]]);
+	     [+(plugwmin/2 + bdx),  bdy]]);
   }
 }
 
-module Bar(){
-  spoolw = spoolwidth + spoolwidthgap*2;
-  barz = barradz * 0.5;
+module Bar(){ ////toplevel
+  spoolw = spoolbarlen;
   biggestw = spoolw + 50;
 
   intersection(){
     for (mir=[0,1]) {
       mirror([mir,0,0]) {
-	translate([0,0,barz]) {
-	  scale([1,barrady,barradz]) translate([-1,0,0])
-	    rotate([0,90,0]) cylinder(r=1, h=spoolw/2+2, $fn=30);
-	  translate([spoolw/2,0,0])
-	    rotate([0,90,0]) cylinder(r=guiderad, h=guidewidth, $fn=60);
-	}
-	translate([spoolw/2 + guidewidth, 0, 0])
+	translate([spoolw/2, 0, 0])
 	  Plug();
+	translate([-1, -50, -50])
+	  cube([spoolw/2+1.1, 100, 100]);
       }
     }
-    translate([-biggestw/2, -50, 0])
-      cube([biggestw, 100, 100]);
+    difference(){
+      translate([-biggestw/2, -50, 0])
+	cube([biggestw, 100, 100]);
+      for (mir=[0,1]) {
+	mirror([mir,0,0])
+	  translate([axlepin_x, 0, -50])
+	  cylinder(r=AxlePin_holerad(), 100, $fn=15);
+      }
+    }
+    translate([0,0,barz]) {
+      translate([-100,0,0])
+	rotate([0,90,0]) cylinder(r=axlerad, h=200, $fn=30);
+    }
   }
 }
 
-module Trestle(){
+module FtAxlePin(){ ////toplevel
+  AxlePin(axlerad, (axlerad + barwasherrad*2)/3 * 2);
+}
+
+module AxleWasher(){ ////toplevel
+  Washer(axlerad, barwasherrad);
+}
+
+module Trestle(){ ////toplevel
   legang = atan2(trestlebase/2, trestleheight);
   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 
-  pinholebasew = pinbasew + pindwidth;
-  pinholeh =     pinminh +  pindh;
+  pinholebasew = pinbasew + pindwidth*2;
+  pinholeh =     pinmaxh +  pindh;
 
   difference(){
     union(){
@@ -84,7 +128,7 @@ module Trestle(){
 	  rotate([0,0, -90-legang])
 	    ExtenderPillars(length=eplen+trestlelegw,
 			    width=trestlelegw,
-			    height=plugl,
+			    height=legw,
 			    baseweb=true);
 
 	  translate([-trestlebase/2, -trestleheight, 0])
@@ -92,10 +136,13 @@ module Trestle(){
 	}
       }
       translate([-topblockw/2, -topblockbasedepth, 0])
-	cube([topblockw, topblockbasedepth + plugh + topblockthick, plugl]);
+	cube([topblockw,
+	      topblockbasedepth + plugh + topblockthick
+	      + (pinmaxh - pinminh)*0.6 + pindh,
+	      plugl]);
 
       translate([-trestlebase/2, -trestleheight, 0])
-	ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=plugl);
+	ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
     }
     translate([-300, -trestleheight-50, -1])
       cube([600, 50, plugl+2]);
@@ -105,13 +152,19 @@ module Trestle(){
 
     for (rot=[0,180]) {
       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
-	translate([-(topblockw*0.25+1),
- 	           plugh + pindh - (pinmaxh - pinminh)/2,
-		   (plugl - pinholebasew*2)/3]) rotate([0,90,0]) {
-	  linear_extrude(height = topblockw*1.0+2) {
-	    polygon([[-1.0 * pinholebasew, -0.01],
-		     [-0.5 * pinholebasew, pinholeh],
-		     [ 0                 , -0.01]]);
+	translate([0,
+ 	           plugh + pindh - (pinmaxh - pinminh)*0.75,
+		   (plugl - pinholebasew*2)/3]) {
+	  translate([-(topblockw*0.25+1), 0, pinholebasew/2])
+	    rotate([-90,0,0]) %Pin();
+	  translate([-(topblockw+1), 0, 0]) {
+	    rotate([0,90,0]) {
+	      linear_extrude(height = topblockw*1.0+2) {
+		polygon([[-1.0 * pinholebasew, -0.01],
+			 [-0.5 * pinholebasew, pinholeh],
+			 [ 0                 , -0.01]]);
+	      }
+	    }
 	  }
 	}
       }
@@ -119,8 +172,102 @@ module Trestle(){
   }
 }
 
-//Bar();
-Trestle();
+module Pin(){ ////toplevel
+  rotate([90,0,90]) {
+    hull(){
+      for (mir=[0,1]) {
+	mirror([mir,0,0]) {
+	  linear_extrude(height=0.1) {
+	    polygon([[-0.01, 0],
+		     [-0.01, pinminh],
+		     [pinbasew*0.5*(pinminh/pinmaxh), 0]]);
+	  }
+	  translate([0,0,pintaperlen])
+	    linear_extrude(height=pinstraightlen) {
+	    polygon([[-0.01, 0],
+		     [-0.01, pinmaxh],
+		     [pinbasew*0.5, 0]]);
+	  }
+	}
+      }
+    }
+  }
+}
 
+module HubEnd(){ ////toplevel
+  thick = hubmainthick+hubbasethick;
+  difference(){
+    union(){
+      for (ang=[0 : 60 : 359]) {
+	rotate([0,0,ang]) {
+	  translate([hubmainrad - hubwalls/2, -hubbasestalkwidth/2, 0])
+	    cube([hubbaserad - (hubmainrad - hubwalls/2),
+		  hubbasestalkwidth, hubbasethick]);
+	  ExtenderPillar(length = hubmainrad-hubwalls/2,
+			 height = hubbasethick + hubmainthick,
+			 pillarw = hubpillarw);
+	}
+      }
+      cylinder(r=axlerad+hubwalls, h=thick);
+      cylinder(r=hubmainrad-0.1, h=hubbaseweb);
+      difference(){
+	cylinder(r=hubmainrad, h=thick, $fn=100);
+	translate([0,0,-1])
+	  cylinder(r=hubmainrad-hubwalls, h=thick+2);
+      }
+      difference(){
+	cylinder(r=hubbaserad, h=hubbasethick, $fn=50);
+	translate([0,0,-1])
+	  cylinder(r=hubbaserad-hubwalls, h=hubbasethick+2);
+      }
+    }
+    translate([0,0,-1])
+      cylinder(r=axlerad+axleslop, h=thick+2, $fn=50);
+  }
+}
+
+
+module TestKit(){ ////toplevel
+  translate([30,0,0]) Pin();
+  translate([30,30,0]) Pin();
+  translate([0,40,0]) intersection(){
+    Trestle();
+    translate([-50,-10,-1]) cube([100,100,100]);
+  }
+  intersection(){
+    translate([-60,0,0]) Bar();
+    cube(50,center=true);
+  }
+}
+
+module DemoSpool(){
+  rotate([0,90,0]) translate([0,0,-spoolwidth/2])
+    difference(){
+      cylinder(r=spoolouterrad, h=spoolwidth);
+      translate([0,0,-1]) cylinder(r=spoolinnerrad, h=spoolwidth+2);
+    }
+}
+
+module Demo(){
+  Bar();
+  for (mir=[0,1]) {
+    mirror([mir,0,0]) {
+      translate([spoolbarlen/2,0,0]) rotate([90,0,90]) Trestle();
+      translate([spoolwidth/2 + hubbasethick + spoolinnerslop/4, 0, barz])
+	rotate([0,90,0]) AxleWasher();
+      translate([axlepin_x, 0, barz]) rotate([90,0,90]) FtAxlePin();
+    }
+  }
+  %translate([0,0,barz]) DemoSpool();
+}
+
+//Bar();
+//FtAxlePin();
+//AxleWasher();
+//Trestle();
+//Pin();
+//TestKit();
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);
+HubEnd();
+//Demo();