powerbank-bike-clamp: wip recess

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

diff --git a/powerbank-bike-clamp.scad b/powerbank-bike-clamp.scad
index 0f2a9c7d6506d61ec515ccb919fa0837d6db30cd..bb8802d2100522af3bb92f231550fd882476a618 100644 (file)
--- a/powerbank-bike-clamp.scad
+++ b/powerbank-bike-clamp.scad
@@ -39,6 +39,11 @@ bank_eps_bbox_x = [149, 598];
 bank_eps_bbox_y = [274, 1452];
 
 bank_x_sz = (24.9 + 0.5);
+bank_recess_y = 5;
+bank_recess_dx = 3;
+
+strap_th = 3;
+strap_above = 2.5;
 
 // calculated
 
@@ -131,7 +136,10 @@ module SomeClamp(hinge_alt=false){
 }
 
 module PowerBankSidePlan(){ ////toplevel
-  intersection(){
+  render() difference(){
+    rectfromto([ -(bank_x_sz/2 + bank_recess_dx),  -(strap_above + strap_th) ],
+              [ +(bank_x_sz/2 + bank_recess_dx),  bank_recess_y ]);
+
     scale( bank_x_sz / ( (
                          bank_eps_bbox_x[1] -
                          bank_eps_bbox_x[0]