Added pulleys, bom item listing

parts.scad

@@ -1,4 +1,5 @@
 include <units.inc>;
+include <lib.scad>;
 include <constants.scad>;
 include <stock_parts.scad>;
 
@@ -11,6 +12,8 @@ corner_size=30;
 // will be $L.
 corner_offset = frame_size / 2 + wall_thickness;
 rail_diam = 8;
+// distance between centerline of rail and centerline of frame Y tube.
+yrail_offset = (frame_size + corner_size / 2) / 2;
 
 ysled_extralen = frame_size; // on each end
 
@@ -23,6 +26,7 @@ ysled_rail_spacing = (sled_ysize);
 
 // Generates bar of length $l, centered on origin extending in +Z
 module tslot(l) {
+  bom_item(printable=false, label = str("tslot(", l, "mm)"));
   colorize(stock_color) {
     translate([-frame_size/2, -frame_size/2, 0])
       cube([frame_size, frame_size, l]);
@@ -60,23 +64,28 @@ module rail_holder(in_x) {
   ldim = frame_size/2 + corner_size;
   tube_offset = (corner_size) / 2 + wall_thickness;
   tube_rotation = in_x ? 90 : 0;
+
+  translated_rail_offset = yrail_offset - frame_size / 2;
+
   translate([frame_size/2, frame_size/2, -frame_size/2]) {
     difference() {
       linear_extrude(frame_size)
-	polygon(points = [[wall_thickness, wall_thickness],
-			  [wall_thickness, corner_size],
-			  [corner_size, wall_thickness]]);
-      translate([corner_size / 2, corner_size/2, frame_size/2])
-	rotate([tube_rotation -90, tube_rotation, 0])
-	translate([0, 0, -corner_size])
-	cylinder(d = rail_diam, corner_size * 2);
+	      polygon(points = [[wall_thickness, wall_thickness],
+			    [wall_thickness, corner_size],
+		      [corner_size, wall_thickness]]);
+
+      translate([translated_rail_offset, translated_rail_offset, frame_size/2])
+        rotate([tube_rotation -90, tube_rotation, 0])
+        translate([0, 0, -corner_size])
+        cylinder(d = rail_diam, corner_size * 4);
 		
     }
   }
 }
 
 // centered on 
-module ysled_slider(spread, associated_parts = false) {
+module ysled_slider(spread, associated_parts = $preview) {
+  bom_item(label = str("ysled_slider(", spread, ")"));
   sled_len = spread + frame_size;
   sled_height = frame_size;
   
@@ -145,35 +154,48 @@ module nema17_housing() {
 }
 
 module flcorner() {
+  bom_item();
   rotate([0, 0, 0]) {
     corner_base();
     rail_holder(false);
   }
   translate([(corner_size-wall_thickness)/2, 0, 0])
     nema17_housing();
+  
+  if($preview)
   translate([(corner_size - wall_thickness) / 2,
 	     -nema17_face/2 - frame_size/2 - wall_thickness,
 	     frame_size/2]) {
     nema17();
+    translate([0, 0, 2]) {
+      pulley(16,6,1,7);
+    }
   }
     
 }
 
 module frcorner() {
+  bom_item();
   rotate([0, 0, 90]) {
     corner_base();
     rail_holder(true);
   }
   translate([-(corner_size-wall_thickness)/2, 0, 0])
     nema17_housing();
+  
+  if($preview)
   translate([-(corner_size - wall_thickness) / 2,
 	     -nema17_face/2 - frame_size/2 - wall_thickness,
 	     frame_size/2]) {
     nema17();
+    translate([0,0,2]) {
+      pulley(16, 1, 6, 7);
+    }
   }
 }
 
 module blcorner() {
+  bom_item();
   rotate([0, 0, 270]) {
     corner_base();
     rail_holder(true);
@@ -181,6 +203,7 @@ module blcorner() {
 }
 
 module brcorner() {
+  bom_item();
   rotate([0, 0, 180]) {
     corner_base();
     rail_holder(false);
@@ -212,17 +235,20 @@ module xsled_slider() {
     }
     
   }
+  if($preview)
   rotate([0, 90, 0])
     bushing();
 }
 
 module sled_cornera() {
+  bom_item();
   corner_base();
   translate([-frame_size/2 - wall_thickness, 0, -frame_size])
     xsled_slider();
 }
 
 module sled_cornerb() {
+  bom_item();
   corner_base();
   rotate([0,0,90])
   translate([-frame_size/2 - wall_thickness, 0, -frame_size])
@@ -270,7 +296,7 @@ module xsled_frame() {
 }
 
 module xsled2() {
-
+  bom_item();
 
   tab_len = bushing_len * 2;
   tab_thickness = bushing_od + wall_thickness * 2;
@@ -368,4 +394,5 @@ module xsled2() {
   }
 }
 // render()
-//xsled2();
+// xsled2();
+