Added pulleys on Y sliders

parts.scad

@@ -13,14 +13,18 @@ corner_size=30;
 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;
+yrail_offset = (frame_size + corner_size) / 2;
 
 ysled_extralen = frame_size; // on each end
 
+// Both of these are distance from frame centerline
+belt_height1 = frame_size / 2 + wall_thickness + belt_width / 2 + 2;
+belt_height2 = belt_height1 + belt_width + 2;
+
 // calculated
 
 ysled_rail_spacing = (sled_ysize);
-
+motor_shaft_xoffset = (corner_size - wall_thickness) / 2;
 
 
 
@@ -83,11 +87,12 @@ module rail_holder(in_x) {
   }
 }
 
-// centered on 
+// centered on the rail.
 module ysled_slider(spread, associated_parts = $preview) {
   bom_item(label = str("ysled_slider(", spread, ")"));
   sled_len = spread + frame_size;
   sled_height = frame_size;
+  idler_spacing = spread / 3;
   
   colorize("green")
   render()
@@ -95,8 +100,11 @@ module ysled_slider(spread, associated_parts = $preview) {
   rotate([-90, 0, 0]) {
     difference() {
       union() {
-	translate([-frame_size/2, -frame_size/2, 0])
-	  cube([frame_size + 5, frame_size, sled_len]);
+        translate([-frame_size/2, -frame_size/2, 0])
+          cube([frame_size + 5, frame_size, sled_len]);
+        translate([pulley_sbend_offset - yrail_offset + motor_shaft_xoffset - pulley_clearance_rad - 4,
+                  -frame_size / 2, 0])
+          cube([frame_size + 5, frame_size, sled_len]);
       }
       
       cylinder(d = bushing_id * 1.1, h = sled_len);
@@ -116,6 +124,23 @@ module ysled_slider(spread, associated_parts = $preview) {
   }
   // TODO: add posts for the idlers
   
+  //color("#f00")
+  translate([pulley_sbend_offset  - yrail_offset + motor_shaft_xoffset, 0, 0]) {
+    translate([0, idler_spacing / 2, 0]) {
+      idler_post(belt_height = belt_height1);
+    }
+    translate([0, -idler_spacing / 2, 0]) {
+      *cylinder(d=3, h=30, $fs=1);
+      *idler(belt_height2);
+      rotate([0, 0, -90]) {
+      idler_post(belt_height = belt_height2);
+      }
+      
+    }
+    
+
+  }
+
   translate([0, -sled_len/2, 0])
   rotate([-90, 0, 0])
   if (associated_parts) {
@@ -153,6 +178,43 @@ module nema17_housing() {
   }
 }
 
+// belt height is the center of the belt.
+// Roration is in Z axis, from +x/+y
+module idler_post(belt_height, toothed=true) {
+  gap=0.5;
+
+  post_radius = pulley_clearance_rad + 4;
+  top_shelf_thickness = 4;
+  total_height = idler_zmargin.y + belt_height + top_shelf_thickness + gap;
+  slot_radius = pulley_clearance_rad;
+  slot_height = idler_zmargin.x + idler_zmargin.y + gap * 2;
+
+  difference() {
+    union() {
+      // outer shell
+      cylinder(h = total_height, r = post_radius);
+      translate([0, -post_radius, 0])
+      cube([post_radius, post_radius, total_height]);
+      translate([-post_radius,0,  0])
+      cube([post_radius, post_radius, total_height]);
+    }
+
+    translate([0,0,belt_height - idler_zmargin.x - gap]) {
+      cylinder(r = slot_radius, slot_height);
+      translate([-slot_radius, 0, 0])
+      cube([post_radius*2, post_radius * 2, slot_height]);
+      translate([0, -slot_radius, 0])
+      cube([post_radius * 2, post_radius * 2, slot_height]);
+    }
+
+    cylinder(d = 3, h=total_height + 1, $fn=60);
+    translate([0, 0, total_height - 2])
+    cylinder(r = 3, h = 3);
+  }
+
+  idler(height = belt_height);
+}
+
 module flcorner() {
   bom_item();
   rotate([0, 0, 0]) {
@@ -167,8 +229,8 @@ module flcorner() {
 	     -nema17_face/2 - frame_size/2 - wall_thickness,
 	     frame_size/2]) {
     nema17();
-    translate([0, 0, 2]) {
-      pulley(16,6,1,7);
+    translate([0, 0, -frame_size/2 + belt_height2]) {
+      active_pulley();
     }
   }
     
@@ -188,8 +250,9 @@ module frcorner() {
 	     -nema17_face/2 - frame_size/2 - wall_thickness,
 	     frame_size/2]) {
     nema17();
-    translate([0,0,2]) {
-      pulley(16, 1, 6, 7);
+    translate([0,0,belt_height1 - frame_size / 2]) {
+      rotate([180,0,0])
+      active_pulley();
     }
   }
 }
@@ -393,6 +456,9 @@ module xsled2() {
     
   }
 }
+
+
+
 // render()
 // xsled2();