digispark-with-cable: midbot_registrations

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/digispark-with-cable.scad b/digispark-with-cable.scad
index 9097a1371d8d9e11a3dc4dd3202fd14f19d7e359..a9a3a11b770f5ae585de046d393fdeb4f8ca5e6b 100644 (file)
--- a/digispark-with-cable.scad
+++ b/digispark-with-cable.scad
@@ -91,6 +91,7 @@ cover_registration_c_dy = -cover_strap_c_d_y - strap_w/2
   - side_wall_th - cover_registration_sz_y/2;
 
 midbot_registration_sz_y = cover_registration_sz_y;
+midbot_registration_sz_z = cover_registration_sz_z;
 midbot_registration_y_min = total_y_min + side_wall_th*2;
 midbot_registration_y_max = midbot_registration_y_min
   + midbot_registration_sz_y;
@@ -172,6 +173,12 @@ module MiddleMainWallsPlan() {
             [ +board_w/2 + side_wall_th,            total_y_min ]);
 }
 
+module RegistrationsMinkowski(){
+  minkowski(){
+    cube([ 1, fit_gap_y*2, fit_gap_z*2 ], center=true);
+    children();
+  }
+}
 module CoverRegistrations(){
   linextr_y_xz(cover_registration_c_dy - strap_w/2,
               cover_registration_c_dy + strap_w/2) {
@@ -186,6 +193,16 @@ module CoverRegistrations(){
     }
   }
 }
+module MidBotRegistrations(){
+  linextr_y_xz(midbot_registration_y_min,
+              midbot_registration_y_max) {
+    BothSides(){
+      rectfromto([ midbot_registration_bottom_x, middle_base_z + 0.1 ],
+                [ middle_side_wall_x, middle_base_z
+                       - midbot_registration_sz_z ]);
+    }
+  }
+}
 
 module Middle(){ ////toplevel
   difference(){
@@ -200,6 +217,7 @@ module Middle(){ ////toplevel
        linextr(cover_wall_bot_z, middle_top_z)
         rectfromto([ -(board_w/2 + 0.1),  total_y_min             ],
                   [ -total_side_wall_x,  main_y_min - fit_gap_y  ]);
+      MidBotRegistrations();
     }
 
     for (y_c = [strain_0_y_c, strain_1_y_c]) {
@@ -259,10 +277,10 @@ module Bottom(){ ////toplevel
        }
       }
     }
-    minkowski(){
+    RegistrationsMinkowski()
       CoverRegistrations();
-      cube([ 1, fit_gap_y*2, fit_gap_z*2 ], center=true);
-    }
+    RegistrationsMinkowski()
+      MidBotRegistrations();
     BottomStrapCutouts(-cover_strap_c_d_y);
   }
 }