Added stepper motors and motor mounts

assembly.scad

@@ -1,16 +1,24 @@
 use_colors = true;
 
-xsize = 500;
+xsize = 450;
 ysize = 400;
-sled_ysize = 5 * 25.4;
-sled_xsize = 6 * 25.4;
+sled_ysize = 7 * 25.4;
+sled_xsize = 8 * 25.4;
 
-cur_xpos = 250;
-cur_ypos = 200;
+xmin = 155;
+ymin = 140;
+// 130..320
+cur_xpos = 155;
+// 140..260
+cur_ypos = 140;
+
+echo(str("Range = ", [ xsize - xmin * 2, ysize - ymin*2 ]));
+
+$fs = 1.5;
+$include_substock = true;
 
 include <parts.scad>;
 
-
 csize = 15;
 
 module frame() {
@@ -31,12 +39,10 @@ module frame() {
     tslot(ysize - 2*corner_offset);
 }
 module corners() {
-  render() {
     translate([0,0]) flcorner();
     translate([xsize, 0, 0]) frcorner();
     translate([xsize, ysize, 0]) brcorner();
     translate([0, ysize, 0]) blcorner();
-  }
 }
 
 module rails() {
@@ -65,37 +71,29 @@ module ysled_rails() {
 
 module xsled() {
   xdiff = sled_xsize / 2 + frame_size / 2;
-  *for(ypos = [-ysled_rail_spacing/2, ysled_rail_spacing/2]) {
-    translate([-xdiff, ypos, 0])
-      xsled_slider();
-    translate([xdiff, ypos, 0])
-      rotate([0,0,180])
-      xsled_slider();
-  }
 
   translate([0, 0, frame_size])
-  xsled_frame();
+    xsled_frame();
+}
+
+module moving_parts(xpos = cur_xpos, ypos = cur_ypos) {
+  translate([frame_size / 2 + corner_size / 2,
+	     cur_ypos, 0]) {
+    ysled_slider(spread = sled_ysize, associated_parts = true);
+    translate([xsize - frame_size - corner_size, 0, 0])
+      rotate([0, 180, 0]) 
+      ysled_slider(spread = sled_ysize, associated_parts = true);
+    ysled_rails();
+    
+  }
+  translate([cur_xpos, cur_ypos, 0])
+    xsled();    
 }
 
 union() {
   frame();
   rails();
   corners();
+  moving_parts();
 }
 
-translate([frame_size / 2 + corner_size / 2, cur_ypos, 0]) {
-  ysled_slider(spread = sled_ysize, associated_parts = true);
-  translate([xsize - frame_size - corner_size, 0, 0])
-    rotate([0, 180, 0]) 
-    ysled_slider(spread = sled_ysize, associated_parts = true);
-  ysled_rails();
-
-  translate([cur_xpos, 0, 0])
-    xsled();
-  
-  
-}
-
-//translate([0, 0, -1000]) cube(2000, center=true);
-
-

parts.scad

@@ -114,12 +114,48 @@ module ysled_slider(spread, associated_parts = false) {
   }
 }
 
+module nema17_housing() {
+  hwidth = corner_size + frame_size + wall_thickness;
+  hheight = nema17_face + wall_thickness * 2;
+  hdepth = frame_size + wall_thickness * 2;
+
+  screw_dxy = 31 / 2;
+  translate([0,
+	     -nema17_face/2 - frame_size/2 - wall_thickness,
+	     0])
+    render()
+  difference() {
+    cube([hwidth, hheight, hdepth],
+	 center=true);
+
+    translate([0,0,-2])
+      cube([nema17_face+1, nema17_face+1, hdepth],
+	   center=true);
+    cylinder(d=23, frame_size);
+
+    for (x = [-screw_dxy, screw_dxy],
+	   y = [-screw_dxy, screw_dxy])
+      translate([x, y, frame_size/2 + wall_thickness])
+      rotate([180, 0, 0]){
+	cylinder(d=5,h=3);
+      }
+	
+  }
+}
+
 module flcorner() {
-  translate([0, 0, 0])
   rotate([0, 0, 0]) {
     corner_base();
     rail_holder(false);
   }
+  translate([(corner_size-wall_thickness)/2, 0, 0])
+    nema17_housing();
+  translate([(corner_size - wall_thickness) / 2,
+	     -nema17_face/2 - frame_size/2 - wall_thickness,
+	     frame_size/2]) {
+    nema17();
+  }
+    
 }
 
 module frcorner() {
@@ -127,6 +163,13 @@ module frcorner() {
     corner_base();
     rail_holder(true);
   }
+  translate([-(corner_size-wall_thickness)/2, 0, 0])
+    nema17_housing();
+  translate([-(corner_size - wall_thickness) / 2,
+	     -nema17_face/2 - frame_size/2 - wall_thickness,
+	     frame_size/2]) {
+    nema17();
+  }
 }
 
 module blcorner() {
@@ -169,7 +212,7 @@ module xsled_slider() {
     
   }
   rotate([0, 90, 0])
-    *bushing();
+    bushing();
 }
 
 module sled_cornera() {
@@ -211,5 +254,16 @@ module xsled_frame() {
   translate([-sled_xsize / 2, sled_ysize / 2, 0])
     rotate([0,0,270])
     sled_cornerb();
-  
+
+
+  // simulate a piece of film
+  if (false) {
+    color("#0008")
+      cube([
+	     5*inch,
+	     4*inch,
+	     1
+	     ],
+	   center=true);
+  }
 }

stock_parts.scad

@@ -1,18 +1,10 @@
-stock_color = "lightgray";
+stock_color = "#aaa4";
 
 bushing_od = 12;
 bushing_id = 8;
 bushing_len = 8;
 
-module bushing() {
-  colorize(stock_color) {
-    difference() {
-      cylinder(d = bushing_od, h = bushing_len);
-      translate([0,0,-1])
-	cylinder(d = bushing_id, h = bushing_len + 2);
-    }
-  }
-}
+nema17_face = 42.3;
 
 module colorize(colorname) {
   if (use_colors) {
@@ -21,3 +13,41 @@ module colorize(colorname) {
     children();
   }
 }
+
+module bushing() {
+  colorize(stock_color) render() {
+    difference() {
+      cylinder(d = bushing_od, h = bushing_len);
+      translate([0,0,-1])
+	cylinder(d = bushing_id, h = bushing_len + 2);
+    }
+  }
+}
+
+// located with the shaft in +z, face on the XY plane 
+module nema17(depth = 23.5) {
+  face = 42.3;
+  screw_pitch = 31 / 2;
+  color(stock_color)
+    render()
+  difference() {
+    union() {
+      translate([-face/2, -face/2, -depth])
+	cube([face, face, depth]);
+      translate([0,0,-1]) {
+	cylinder(d=22, h=2+1);
+	cylinder(d=5, h=22+1);
+      }
+    }
+    translate([1.25, -5, 4])
+      cube([10, 10, 20]);
+
+    // screw holes
+    for (x = [-screw_pitch, screw_pitch],
+	   y = [-screw_pitch, screw_pitch]) {
+      translate([x,y,-10])
+	cylinder(d=5,h=20);
+    }
+  }
+
+}