X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamenttrestle.scad;h=376a1ae202903216dc8d871102147f74f7b30d46;hp=b0ee2f97b58e4719acb73cb1611e32520ae93e2c;hb=cd9506cd4f5fea2b670bf46cf45d937376e5e77f;hpb=91f5ba0700d93ad98d2e460ab09c78f1117243f4

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index b0ee2f9..376a1ae 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -1,16 +1,30 @@
 // -*- C -*-
 
-spoolwidth = 80; // fixme needs to be measured
-trestleheight = 80; // fixme needs to be checked
-trestlebase = 80; // fixme needs to be checked
+spoolinnerdia = 32;
+spoolwidth = 88.0;
+spoolinnerrad = (spoolinnerdia - 0.2) / 2;
+spoolouterrad = spoolinnerrad + 61.5;
 
 include <doveclip.scad>
+include <axlepin.scad>
 
-spoolwidthgap = 2;
-barrady = 5;
-barradz = 7;
-guidewidth = 3;
-guiderad = 20;
+spoolradclear = 10;
+spoolradslop = 2;
+
+spoolinnerslop = 3;
+axleslop = 0.5;
+
+axlerad = 7;
+barwasherrad = 17;
+
+hubbasethick = 4;
+hubmainthick = 15;
+hubbaseweb = 1.2;
+hubbasestalkwidth = 4;
+hubwalls = 2.5;
+hubpillarw = 4;
+hubbaserad = spoolinnerrad + 10;
+hubmainrad = spoolinnerrad - spoolradslop;
 
 legw = 12;
 plugl = 20;
@@ -19,21 +33,34 @@ plugh = 10;
 plugslope = 0.5;
 plugwmax = plugwmin + plugh * plugslope * 2;
 
+trestlefoot = 15;
+
 trestlelegw = 10;
 trestlebaseh = 10;
 trestleplugd = 1;
 
-topblockthick = 4;
+topblockthick = 3;
 topblockbasedepth = 5;
 
-pinbasew = 5.0;
-pinminh = 1.5;
-pinmaxh = 4.5;
-pindh = 0.50;
-pindwidth = 0.75;
+pinbasew = 4.0;
+pinminh = 1.0;
+pinmaxh = 3.5;
+pindh = 1.75;
+pindwidth = 1.75;
+
+pintaperlen = 20;
+pinstraightlen = 30-pintaperlen;
 
-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;
@@ -53,28 +80,42 @@ module Plug(d=0){
 }
 
 module Bar(){ ////toplevel
-  spoolw = spoolwidth + spoolwidthgap*2;
-  barz = barradz * 0.5;
+  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=60);
+    }
   }
 }
 
+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);
@@ -94,35 +135,38 @@ module Trestle(){ ////toplevel
 			    baseweb=true);
 
 	  translate([-trestlebase/2, -trestleheight, 0])
-	    cylinder(r=trestlelegw/2*1.2, h=plugl);
+	    cylinder(r=trestlelegw/2*1.2, h=trestlefoot);
 	}
       }
       translate([-topblockw/2, -topblockbasedepth, 0])
 	cube([topblockw,
 	      topblockbasedepth + plugh + topblockthick
-	      + (pinmaxh - pinminh)*0.6 + pindh,
+	      + (pinmaxh - pinminh)*0.5,
 	      plugl]);
 
       translate([-trestlebase/2, -trestleheight, 0])
 	ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
     }
     translate([-300, -trestleheight-50, -1])
-      cube([600, 50, plugl+2]);
+      cube([600, 50, 52]);
 
     rotate([-90,-90,0])
       Plug(d=trestleplugd);
 
     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)*0.75,
+	translate([0,
+ 	           plugh - (pinmaxh - pinminh)*1.00,
 		   (plugl - pinholebasew*2)/3]) {
-	  translate([0,0,pinholebasew/2]) rotate([-90,0,0]) %Pin();
-	  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([-(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*2.0+2) {
+		polygon([[-1.0 * pinholebasew, -0.01],
+			 [-0.5 * pinholebasew, pinholeh],
+			 [ 0                 , -0.01]]);
+	      }
 	    }
 	  }
 	}
@@ -153,22 +197,88 @@ module Pin(){ ////toplevel
   }
 }
 
+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([60,0,0]) mirror([1,0,0]) Pin();
+  translate([60,15,0]) mirror([1,0,0]) Pin();
   translate([0,40,0]) intersection(){
     Trestle();
     translate([-50,-10,-1]) cube([100,100,100]);
   }
   intersection(){
-    translate([-60,0,0]) Bar();
+    translate([-60,10,0]) Bar();
     cube(50,center=true);
   }
+  %translate([50,40, AxlePin_zoffset()]) FtAxlePin();
+  %translate([0,-20,0]) AxleWasher();
+}
+
+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(){ ////toplevel
+  color("blue") Bar();
+  for (mir=[0,1]) {
+    mirror([mir,0,0]) {
+      color("red") translate([spoolbarlen/2,0,0])
+	rotate([90,0,90]) Trestle();
+      color("orange")
+	translate([spoolwidth/2 + hubbasethick + spoolinnerslop*2/3, 0, barz])
+	rotate([0,90,0]) AxleWasher();
+      color("orange") translate([axlepin_x, 0, barz])
+	rotate([90,0,90]) FtAxlePin();
+      color("cyan")
+	translate([spoolwidth/2 + hubbasethick + spoolinnerslop*1/3, 0, barz])
+	rotate([0,-90,0]) HubEnd();
+    }
+  }
+  %translate([0,0,barz]) DemoSpool();
 }
 
 //Bar();
+//FtAxlePin();
+//AxleWasher();
 //Trestle();
 //Pin();
-TestKit();
+//TestKit();
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);
+//HubEnd();
+//Demo();