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=7d8436a9e9ab857ffc000e3acbd736d5c19733db;hb=59c46629d0aab88ec2703ff484c01db1718472c7;hpb=38dbcef745604ab74b3f3567c3bb4424baa1cc6d

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 7d8436a..376a1ae 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -1,34 +1,284 @@
 // -*- C -*-
 
-spoolwidth = 80; // fixme needs to be measured
+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;
 
-module Bar(){
-  spoolw = spoolwidth + spoolwidthgap*2;
-  barz = barradz * 0.5;
+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;
+plugwmin = 3;
+plugh = 10;
+plugslope = 0.5;
+plugwmax = plugwmin + plugh * plugslope * 2;
+
+trestlefoot = 15;
+
+trestlelegw = 10;
+trestlebaseh = 10;
+trestleplugd = 1;
+
+topblockthick = 3;
+topblockbasedepth = 5;
+
+pinbasew = 4.0;
+pinminh = 1.0;
+pinmaxh = 3.5;
+pindh = 1.75;
+pindwidth = 1.75;
+
+pintaperlen = 20;
+pinstraightlen = 30-pintaperlen;
+
+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);
+  bdy = -dhb;
+  bdx = dw / cos(a) + bdy * plugslope;
+  tdy = dh;
+  tdx = bdx + tdy * plugslope;
+  translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
+    polygon([[-(plugwmin/2 + bdx),  bdy],
+	     [-(plugwmax/2 + tdx),  plugh + tdy],
+	     [+(plugwmax/2 + tdx),  plugh + tdy],
+	     [+(plugwmin/2 + bdx),  bdy]]);
+  }
+}
+
+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, 0, 0])
+	  Plug();
+	translate([-1, -50, -50])
+	  cube([spoolw/2+1.1, 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);
+  topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
+
+  pinholebasew = pinbasew + pindwidth*2;
+  pinholeh =     pinmaxh +  pindh;
+
+  difference(){
+    union(){
+      for (mir=[0,1]) {
+	mirror([mir,0,0]) {
+	  rotate([0,0, -90-legang])
+	    ExtenderPillars(length=eplen+trestlelegw,
+			    width=trestlelegw,
+			    height=legw,
+			    baseweb=true);
+
+	  translate([-trestlebase/2, -trestleheight, 0])
+	    cylinder(r=trestlelegw/2*1.2, h=trestlefoot);
+	}
+      }
+      translate([-topblockw/2, -topblockbasedepth, 0])
+	cube([topblockw,
+	      topblockbasedepth + plugh + topblockthick
+	      + (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, 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([0,
+ 	           plugh - (pinmaxh - pinminh)*1.00,
+		   (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*2.0+2) {
+		polygon([[-1.0 * pinholebasew, -0.01],
+			 [-0.5 * pinholebasew, pinholeh],
+			 [ 0                 , -0.01]]);
+	      }
+	    }
+	  }
+	}
+      }
+    }
+  }
+}
+
+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([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([-60,10,0]) 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([-biggestw/2, -50, 0])
-      cube([biggestw, 100, 100]);
   }
+  %translate([0,0,barz]) DemoSpool();
 }
 
-Bar();
+//Bar();
+//FtAxlePin();
+//AxleWasher();
+//Trestle();
+//Pin();
+//TestKit();
+//Plug(d=1);
+//ExtenderPillars(80,12,8, baseweb=true);
+//HubEnd();
+//Demo();