digispark-with-cable: wip progress

[reprap-play.git] / digispark-with-cable.scad

diff --git a/digispark-with-cable.scad b/digispark-with-cable.scad
index 32d65423dd2cf843b758f982f8e79efd29b1474d..617abea4f2c6a50abc69b16567d8457b82c1b6d1 100644 (file)
--- a/digispark-with-cable.scad
+++ b/digispark-with-cable.scad
@@ -11,7 +11,7 @@ usb_tongue_w_slop = +0.5;
 usb_wall_h = 4.54 - 2.04;
 usb_ceil_th = 0.425;
 
-side_wall_th = 1.5;
+side_wall_th = 1.5; // XXXX rename wall_th
 
 board_l = 17.56 + 0.2;
 board_w = 19.14 + 0.2;
@@ -23,7 +23,6 @@ front_wall_th = 0.75;
 // egress_w = 8.0;
 
 wall_y_min = -board_l - side_wall_th; // XXXX remove
-main_y_min = -board_l - side_wall_th;
 ceil_y_min = wall_y_min - 5;;
 
 small_walls = [
@@ -43,11 +42,15 @@ strain_groove_d = 2;
 strain_groove_w = 3;
 
 cable_space_z = 6;
+cable_dia = 5;
 bottom_floor_th = 1.5;
 
 fit_gap_z = 0.5;
+fit_gap_y = 0.25;
 side_x_gap = 0.5;
 
+cover_ceil_th = 0.9;
+
 // calculated
 
 top_top_z = usb_wall_h;
@@ -55,13 +58,15 @@ top_base_z = -board_th;
 bottom_base_z = top_base_z - cable_space_z - bottom_floor_th;;
 
 front_y_max = front_wall_th;
+main_y_min = -board_l - side_wall_th;
 
 strain_0_y_c = main_y_min - strain_w/2;
 strain_1_y_c = strain_0_y_c - strain_pitch_along;
 total_y_min = strain_1_y_c - strain_w/2 - side_wall_th;
 
 bottom_wall_top_z = (top_top_z + top_base_z) * 0.5 - fit_gap_z/2;
-cover_wall_top_z  = (top_top_z + top_base_z) * 0.5 + fit_gap_z/2;
+cover_wall_bot_z  = (top_top_z + top_base_z) * 0.5 + fit_gap_z/2;
+cover_top_z  = top_top_z + cover_ceil_th;
 
 top_side_wall_x = +board_w/2 + side_wall_th;
 total_side_wall_x = top_side_wall_x + side_wall_th + side_x_gap;
@@ -121,6 +126,10 @@ module Top(){ ////toplevel
        TopCeilPlan();
       linextr(-board_th, usb_wall_h)
        TopMainWallsPlan();
+      BothSides()
+       linextr(cover_wall_bot_z, top_top_z)
+        rectfromto([ -(board_w/2 + 0.1),  total_y_min             ],
+                  [ -total_side_wall_x,  main_y_min - fit_gap_y  ]);
     }
 
     for (y_c = [strain_0_y_c, strain_1_y_c]) {
@@ -137,23 +146,58 @@ module Top(){ ////toplevel
   }
 }
 
-module BottomMainElevation(){ ////toplevel
+module TopElevationForCutout(){
+    rectfromto([ -(top_side_wall_x + side_x_gap), top_base_z ],
+              [ +(top_side_wall_x + side_x_gap), top_top_z  ]);
+}
+module BottomMainElevation(){
   difference(){
     rectfromto([ -total_side_wall_x, bottom_base_z        ],
               [ +total_side_wall_x, bottom_wall_top_z    ]);
 
-    rectfromto([ -(top_side_wall_x + side_x_gap), top_base_z ],
-              [ +(top_side_wall_x + side_x_gap), 20         ]);
-    rectfromto([ -board_w/2, bottom_base_z + bottom_floor_th ],
-              [ +board_w/2, 20         ]);
+    TopElevationForCutout();
   }
 }
 module Bottom(){ ////toplevel
-  linextr_y_xz(total_y_min, front_y_max)
-    BottomMainElevation();
+  difference(){
+    union(){
+      linextr_y_xz(total_y_min, front_y_max)
+       BottomMainElevation();
+    }
+
+    linextr_y_xz(total_y_min + side_wall_th,
+                front_y_max - side_wall_th)
+      rectfromto([ -board_w/2, bottom_base_z + bottom_floor_th ],
+                [ +board_w/2, 20         ]);
+
+    linextr_y_xz(total_y_min - 1,
+                total_y_min + side_wall_th + 1){
+      translate([ 0, top_base_z ]){
+       hull(){
+         translate([ 0, -cable_dia/2 ])
+           circle(r = cable_dia/2, $fa = 10, $fs = 1);
+         square([ cable_dia, 0.1 ], center=true);
+       }
+      }
+    }
+  }
+}
+
+module CoverMainElevation(){
+  difference(){
+    rectfromto([ -total_side_wall_x, cover_wall_bot_z        ],
+              [ +total_side_wall_x, cover_top_z    ]);
+
+    TopElevationForCutout();
+  }
+}
+module Cover(){ ////toplevel
+  linextr_y_xz(main_y_min, front_y_max)
+    CoverMainElevation();
 }
 
 module BottomDemo(){ ////toplevel
-  Bottom();
-  translate([0, 0, 0.25]) %Top();
+  translate([0, 0, -0.25]) Bottom();
+  %Top();
+  translate([0, 0, +0.25]) Cover();
 }