strain_t = 1.0 + 0.5;
strain_pitch_across = 5;
strain_pitch_along = 10;
+strain_groove_d = 2;
+strain_groove_w = 3;
// calculated
}
module Top(){ ////toplevel
- linextr(0, usb_wall_h)
- TopSmallWallsPlan();
- linextr(usb_wall_h - usb_ceil_th, usb_wall_h)
- TopCeilPlan();
- linextr(-board_th, usb_wall_h)
- TopMainWallsPlan();
+ difference(){
+ union(){
+ linextr(0, usb_wall_h)
+ TopSmallWallsPlan();
+ linextr(usb_wall_h - usb_ceil_th, usb_wall_h)
+ TopCeilPlan();
+ linextr(-board_th, usb_wall_h)
+ TopMainWallsPlan();
+ }
+
+ for (y_c = [strain_0_y_c, strain_1_y_c]) {
+ for (x_c = [-1,+1] * strain_pitch_across/2) {
+ translate([x_c, y_c, 0])
+ linextr(-20, 20)
+ square([ strain_t, strain_w ], center=true);
+ }
+ }
+ linextr_y_xz(total_y_min-1, main_y_min)
+ translate([0, -board_th])
+ scale([1, strain_groove_d/strain_groove_w])
+ circle(strain_groove_w/2, $fn = 8);
+ }
}
module Bottom(){ ////toplevel