From 8809a4ab219af4e511886daa6d1ca2c66253b5fb Mon Sep 17 00:00:00 2001
From: TQ Hirsch <thequux@thequux.com>
Date: Fri, 4 Mar 2022 15:11:45 +0100
Subject: [PATCH] Raised the film holder, swapped out bushings with LM8UU
 equivalents

---
 parts.scad       | 60 +++++++++++++++++++++++++++++++-----------------
 stock_parts.scad |  4 ++--
 2 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/parts.scad b/parts.scad
index 2d4063c..55f46e3 100644
--- a/parts.scad
+++ b/parts.scad
@@ -327,17 +327,27 @@ module xsled2() {
 
   lip_depth = tab_thickness - wall_thickness - glass_thickness;
   lip_width = glass_thickness;
+  film_height = belt_height2 + belt_width / 2;
+  ledge_width = 15;
+  inside_ledge_width = ledge_width - 8;
+
+  film_thickness = 0.25;
+
+  finger_notch_diam = 25;
+  finger_notch_smdepth = 2;
 
   glass_holder_points = [
-    [ 0, 0 ], [ lip_depth + wall_thickness, 0 ],
-    [ lip_depth + wall_thickness, wall_thickness + 0.5 ],
-    [ lip_depth, wall_thickness + 0.5 ],
-    [ lip_depth, wall_thickness + glass_thickness ],
-    [ lip_depth - glass_thickness, wall_thickness + glass_thickness ],
-    [ lip_depth - glass_thickness, wall_thickness + glass_thickness * 2 ],
-    [ 0, tab_thickness ]
+    [0, -tab_thickness/2],
+    [0, film_height + glass_thickness],
+    [wall_thickness, film_height + glass_thickness],
+    [wall_thickness, film_height],
+    [inside_ledge_width, film_height],
+    [inside_ledge_width, film_height - glass_thickness + 0.5, ],
+    [ledge_width, film_height - glass_thickness + 0.5],
+
   ];
 
+  echo("Ledge width: ", ledge_width - inside_ledge_width);
   for (xsign = [ 1, -1 ], ysign = [ 1, -1 ]) {
     translate([ sled_xsize / 2 * xsign, sled_ysize / 2 * ysign, 0 ])
         rotate([ 0, -90 * xsign, 0 ]) {
@@ -361,51 +371,59 @@ module xsled2() {
     // cube([sled_xsize, inner_ysize, tab_thickness/2], center=true);
     difference() {
       union() {
-        translate([ -sled_xsize / 2, -inner_ysize / 2, -tab_thickness / 2 ])
+        translate([ -sled_xsize / 2, -inner_ysize / 2, 0])
             rotate([ 0, 90, 0 ]) rotate([ 0, 0, 90 ]) linear_extrude(sled_xsize)
                 polygon(glass_holder_points);
 
-        translate([ sled_xsize / 2, inner_ysize / 2, -tab_thickness / 2 ])
+        translate([ sled_xsize / 2, inner_ysize / 2, 0 ])
             rotate([ 0, 90, 180 ]) rotate([ 0, 0, 90 ])
                 linear_extrude(sled_xsize) polygon(glass_holder_points);
 
-        translate([ sled_xsize / 2, -inner_ysize / 2, -tab_thickness / 2 ])
+        translate([ sled_xsize / 2, -inner_ysize / 2, 0 ])
             rotate([ 0, 90, 90 ]) rotate([ 0, 0, 90 ])
                 linear_extrude(inner_ysize) polygon(glass_holder_points);
 
-        translate([ -sled_xsize / 2, inner_ysize / 2, -tab_thickness / 2 ])
+        translate([ -sled_xsize / 2, inner_ysize / 2, 0 ])
             rotate([ 0, 90, -90 ]) rotate([ 0, 0, 90 ])
                 linear_extrude(inner_ysize) polygon(glass_holder_points);
       }
 
       translate([
-        -10, inner_ysize / 2 - 1 - lip_depth + glass_thickness,
-        -tab_thickness / 2 + wall_thickness +
-        glass_thickness
-      ]) cube([ 20, glass_thickness + 1, 30 ]);
+        -10, -inner_ysize / 2,
+        
+        film_height - glass_thickness + 0.5 - finger_notch_smdepth + finger_notch_diam / 2
+      ]) rotate([90, 0, 0])
+        cylinder(d=finger_notch_diam, h = ledge_width * 3, center=true);
     }
   }
 
   color("#fff3") if ($preview) {
     // draw glass sheets
     translate(
-        [ 0, 0, -tab_thickness / 2 + wall_thickness + glass_thickness / 2 ])
+        [ 0, 0, film_height - glass_thickness / 2 + 0.5 ])
         cube(
             [
-              sled_xsize - lip_depth * 2, inner_ysize - lip_depth * 2,
+              sled_xsize - inside_ledge_width * 2,
+               inner_ysize - inside_ledge_width * 2,
               glass_thickness
             ],
             center = true);
-    translate(
-        [ 0, 0, -tab_thickness / 2 + wall_thickness + 3 * glass_thickness / 2 ])
+    *translate(
+        [ 0, 0, film_height + film_thickness * 2 + glass_thickness / 2 + 0.5 ])
         cube(
             [
-              sled_xsize - lip_depth * 2 + glass_thickness * 2,
-              inner_ysize - lip_depth * 2 + glass_thickness * 2,
+              sled_xsize - wall_thickness * 2,
+              inner_ysize - wall_thickness * 2,
               glass_thickness
             ],
             center = true);
   }
+  if($preview) {
+    color("#0003")
+    translate([0, 0, film_height + 0.5]) {
+      cube([5*inch, 4*inch, film_thickness], center=true);
+    }
+  }
 }
 
 // render()
diff --git a/stock_parts.scad b/stock_parts.scad
index 2d51bf2..44a2b43 100644
--- a/stock_parts.scad
+++ b/stock_parts.scad
@@ -3,9 +3,9 @@ include <lib.scad>
 
 stock_color = "#aaa4";
 
-bushing_od = 12;
+bushing_od = 15;
 bushing_id = 8;
-bushing_len = 8;
+bushing_len = 24;
 
 nema17_face = 42.3;