X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=crossbar-computer-led-mount.scad;h=535c680599d00addd496d5221d0a191e1425fe70;hp=ab337051d97a474f6fb64694d8e7351003425e2d;hb=a60d8c9ef6fa1114f21ac9c9f09318c5f63aa71a;hpb=3a8891766ac284a5804de293be3297e4d2cd2c56

diff --git a/crossbar-computer-led-mount.scad b/crossbar-computer-led-mount.scad
index ab33705..535c680 100644
--- a/crossbar-computer-led-mount.scad
+++ b/crossbar-computer-led-mount.scad
@@ -3,34 +3,56 @@
 led_dia = 5 + 0.6;
 led_depth = 5;
 
-led_tip_z = 70;
+led_tip_height_above_crossbar = 70;
 led_angle = -60;
+crossbar_dia = 25; // fixme
 
 vert_space_inside = 8;
 backfront_space_inside = 12;
+width_space_inside = 10;
 
 backfront_mate_size = 25;
-tower_frontheight = 20;
-tower_width = 18;
+tower_frontheight = 10;
+tower_base_height = 20;
 tower_slot_width = 3;
 
-cableclamp_ctie_width = 3 + 0.5;
-cableclamp_ctie_thick = 2 + 0.5;
+cableclamp_ctie_width = 4.0 + 1.0;
+cableclamp_ctie_thick = 2.5 + 0.5;
 
-lidclamp_ctie_width = 3 + 0.5;
-lidclamp_ctie_thick = 2 + 0.5;
+lidclamp_ctie_width = 4.0 + 1.0;
+lidclamp_ctie_thick = 2.5 + 0.5;
 
-base_ctie_width = 4 + 0.5;
-base_ctie_thick = 2 + 0.5;
+base_ctie_width = 4.0 + 1.0;
+base_ctie_thick = 2.5 + 0.5;
+
+tube_ctie_width = 4.0 + 1.0;
+tube_ctie_thick = 2.5 + 0.5;
 
 // tuning
 
 tower_over_angle = 45;
 tower_wall_thick = 1.6;
-tower_base_height = 10;
 tower_forehead_angle = 30;
 lid_wall_thick = 1.6;
 lid_slop = 0.75;
+//cableclamp_ctie_anchor = 5;
+lidclamp_cableclamp_ctie_between = 0;
+base_ctie_anchor = 5;
+tube_ctie_anchor = 5;
+protrusion_size = 2;
+protrusion_none_frontback = 10;
+protrusion_slop = 0.25;
+cableclamp_ctie_z = tower_frontheight/2;
+
+towerleg_backfront = 5;
+towerleg_width = 3;
+towerleg_foot_gap = 2;
+towerleg_foot_backfront = 20;
+towerleg_foot_width = 40;
+towerleg_foot_height = 10;
+towerleg_yslope = 0.7;
+towerleg_xslope = 0.3;
+echo(sqrt(towerleg_yslope*towerleg_yslope+towerleg_xslope*towerleg_xslope));
 
 //--- tests ---
 
@@ -58,7 +80,10 @@ module Tests(){ ////toplevel
 
 //--- real thing ---
 
+// calculated
+
 tower_overhang = led_dia * 2.5;
+tower_width = width_space_inside + tower_wall_thick*2;
 
 tower_over_max_y = tower_overhang * sin(tower_over_angle);
 tower_over_max_z = tower_frontheight + tower_overhang * cos(tower_over_angle);
@@ -68,6 +93,19 @@ led_head_y = tower_over_max_y/2;
 led_head_z = tower_frontheight + tower_overhang*sin(tower_over_angle)/2;
 backfront_mate_extra = (backfront_mate_size - (-tower_rearwall_y));
 
+tower_height_contribution = led_head_z + tower_base_height;
+
+base_ctie_anchor_eff = base_ctie_anchor+base_ctie_thick/2;
+tube_ctie_anchor_eff = tube_ctie_anchor+tube_ctie_thick/2;
+
+base_width = 0.7 * crossbar_dia;
+base_backfront = backfront_mate_extra - tower_rearwall_y;
+base_height = led_tip_height_above_crossbar - tower_height_contribution;
+
+protrusion_frontback = base_backfront - protrusion_none_frontback;
+
+echo(tower_height_contribution, base_height);
+
 module TowerWallCrossSection(){
   // generates a 2D shape - a polygon
   // x is what is going to be -y
@@ -156,34 +194,69 @@ module TowerMain(){
 
 module LedHole(){
   translate([0, led_head_y, led_head_z])
-    rotate([90 + led_angle])
+    rotate([90 + led_angle, 0, 0])
     translate([0,0,-10])
-    cylinder(r=led_dia/2, h=led_depth+0.1+10, $fn=30);
+    cylinder(r=led_dia/2, h=led_depth+1+10, $fn=26, $fa=10);
 }
 
-module Tower(){ ////toplevel
+module TowerProper(){
   difference(){
     TowerMain();
     LedHole();
     // passages for cable ties
     translate([0,
 	       tower_rearwall_y/2,
-	       tower_frontheight/2
-	       + cableclamp_ctie_width/2 + lidclamp_ctie_thick/2])
+	       cableclamp_ctie_z
+	       + cableclamp_ctie_width/2 + lidclamp_ctie_thick/2
+	       + lidclamp_cableclamp_ctie_between])
       cube([50, lidclamp_ctie_width, lidclamp_ctie_thick], center=true);
     translate([0,
 		(backfront_mate_extra+tower_rearwall_y)/2,
-		-tower_base_height/2])
+		-tower_base_height
+	       + max(protrusion_size + protrusion_slop + 0.1,
+		     base_ctie_anchor_eff)])
       cube([50, base_ctie_width, base_ctie_thick], center=true);
+//    for (extra_y=[0, -(cableclamp_ctie_thick + cableclamp_ctie_anchor)]) {
+//      translate([-tower_width/2,
+//		 -cableclamp_ctie_thick/2 - tower_wall_thick + extra_y,
+//		 cableclamp_ctie_z])
+//	cube([tower_wall_thick+2,
+//	      cableclamp_ctie_thick,
+//	      cableclamp_ctie_width], center=true);
+//    }
     for (mir=[0,1])
-      mirror([mir,0,0]) {
-	translate([tower_width/4, 20, tower_frontheight/2])
+     mirror([mir,0,0]) {
+	translate([tower_width/4, 20, cableclamp_ctie_z])
 	  cube([cableclamp_ctie_thick,
 		tower_wall_thick*2+1+40,
 		cableclamp_ctie_width],
 	       center=true);
       }
+    translate([0, tower_rearwall_y, -tower_base_height])
+      BaseRegistrationProtrusion(protrusion_slop);
+  }
+}
+
+module Tower(){ ////toplevel
+  TowerProper();
+  for (mir=[0,1]) {
+    mirror([mir,0,0]){
+      translate([0,
+		 tower_rearwall_y + 0.1,
+		 -1])
+	mirror([0,0,1])
+	multmatrix([[1,0, towerleg_xslope,0],
+		    [0,1,-towerleg_yslope,0],
+		    [0,0,1,0],
+		    [0,0,0,1]])
+	cube([towerleg_width, towerleg_backfront, tower_base_height-2]);
+    }
   }
+  translate([-towerleg_foot_width/2,
+	     tower_rearwall_y - towerleg_foot_gap,
+	     -tower_base_height])
+    mirror([0,1,0])
+    cube([towerleg_foot_width, towerleg_foot_backfront, towerleg_foot_height]);
 }
 
 module TowerMainHull(){
@@ -195,11 +268,11 @@ module Lid(){
     difference(){
       minkowski(){
 	TowerMainHull();
-	sphere(r=lid_wall_thick+lid_slop, $fn=4);
+	sphere(r=lid_wall_thick+lid_slop, $fn=8);
       }
       minkowski(){
 	TowerMainHull();
-	sphere(r=lid_slop, $fn=4);
+	sphere(r=lid_slop, $fn=6);
       }
     }
     translate([-50,-50,led_head_z]) cube([100,100,100]);
@@ -210,9 +283,48 @@ module LidT(){ ////toplevel
   rotate([180,0,0]) Lid();
 }
 
+module BaseRegistrationProtrusion(extra){
+  size = protrusion_size + extra;
+  translate([0, base_backfront/2, 0]){
+    hull(){
+      translate([0,0, -0.5])
+	cube([protrusion_size*2, protrusion_frontback, 1.0], center=true);
+      translate([0, 0, protrusion_size-0.5])
+	cube([0.05, protrusion_frontback-protrusion_size*2, 1.0], center=true);
+    }
+  }
+}
+
+module Base(){
+  difference(){
+    mirror([0,0,1]){
+      hull(){
+	translate([-tower_width/2, 0, 0])
+	  cube([tower_width, base_backfront, 0.1]);
+	translate([-base_width/2, 0, base_height])
+	  cube([base_width, base_backfront, crossbar_dia/2]);
+      }
+    }
+    translate([0, base_backfront/2, -base_ctie_anchor_eff])
+      cube([100, base_ctie_width, base_ctie_thick], center=true);
+    translate([0, base_backfront/2, -base_height + tube_ctie_anchor_eff])
+      cube([100, tube_ctie_width, tube_ctie_thick], center=true);
+    translate([0, -1, -(base_height + crossbar_dia/2)])
+      rotate([-90,0,0])
+      cylinder(r=crossbar_dia/2, h=101);
+  }
+  BaseRegistrationProtrusion(0.0);
+}
+
+module BaseT(){ ////toplevel
+  rotate([90,0,0]) Base();
+}
+
 module Demo(){
   Tower();
+  %Lid();
   translate([0,0, 25]) Lid();
+  translate([0, tower_rearwall_y, -(tower_base_height+5)]) Base();
 }
 
 //TowerCrossSectionDemo();
@@ -222,4 +334,7 @@ module Demo(){
 //LidT();
 //Tower();
 //Lid();
-Demo();
+//BaseRegistrationProtrusion();
+//Base();
+//BaseT();
+//Demo();