5 $hinge_pin_dia = 0.795 + 0.35;
7 $hinge_inter_gap = 0.50;
8 $hinge_prong_minwidth = 3.0;
9 $hinge_noncrit_gap = 1.0;
14 module HingePinPlan(){
15 circle(r= $hinge_pin_dia/2);
18 module HingeProngPlan(behind){
20 circle(r= $hinge_main_dia/2);
22 [-$hinge_main_dia/2, -behind],
23 [+$hinge_main_dia/2, -behind]]);
27 module HingeGapPlan() {
28 circle(r = $hinge_main_dia/2 + $hinge_inter_gap);
34 translate([0,0,1]) color("red") HingePinPlan();
37 module HingePositive(l, behind){
39 HingeProngPlan(behind);
42 module HingeNegative(l){
43 eff_l = l + $hinge_inter_gap;
44 pairs = floor(eff_l / (2*($hinge_prong_minwidth + $hinge_inter_gap)));
45 stride = eff_l / pairs;
46 prong_width = stride/2 - $hinge_inter_gap;
47 linextr_x_yz(-0.1, l+0.1)
50 translate(stride * i * [1,0,0])
51 linextr_x_yz(0 + (i==0 ? -0.1 : 0), prong_width + $hinge_inter_gap)
58 HingePositive(30, 10);