of it.
*/
-$fn = 50;
+/*
+ * * TODO make hole for thing between cans
+ * * TODO make hole for screws in corners of pcb
+ */
+
+$fn = 150;
sonar_diameter_measured = 15.82;
-sonar_diameter_print_fudge = 0.5;
+sonar_diameter_print_fudge = 0.4;
sonar_diameter = sonar_diameter_measured + sonar_diameter_print_fudge;
sonar_radius = sonar_diameter / 2;
between_sonar_cans = 10.82;
between_sonar_centers = sonar_diameter + between_sonar_cans;
+// the sonar cylinders are placed on the pcb at slightly different positions
+// from one sensor to the next, so this allows for that variance.
+between_sonar_centers_variation = 2;
+
+wall_thickness = 4;
+
+screw_diameter_measured = 3.45;
+screw_radius_measured = screw_diameter_measured / 2;
+screw_radius_print_fudge = 0.4;
+screw_radius = screw_radius_measured + screw_radius_print_fudge;
+
+sonar_binder_clip_holder_height = 3;
+
+/*
+ sonar holder
+ sonar holder outline
+ sonar holder holes
+ binder clip holder
+ binder clip holder outline
+ binder clip holder holes
+ sonar binder clip joiner
+ */
+
+module sonar_holder_holes_2d(sonar_radius,
+ between_sonar_centers,
+ between_sonar_centers_variation) {
+ hull(){
+ circle(sonar_radius);
+ translate([between_sonar_centers_variation, 0]){
+ circle(sonar_radius); } }
+ translate([between_sonar_centers, 0]) {
+ circle(sonar_radius); } }
+
+module sonar_holder_outline_2d(holder_radius,
+ between_sonar_centers) {
+ smaller_radius = holder_radius / 4;
+ inside_radius = holder_radius - smaller_radius;
+ hull() {
+ offset(r = smaller_radius){
+ square([inside_radius * 2, inside_radius * 2], center=true); }
+ translate([between_sonar_centers, 0]) {
+ circle(holder_radius); } } }
+
+module sonar_holder_2d(holder_radius,
+ between_sonar_centers,
+ sonar_radius,
+ between_sonar_centers_variation) {
+ difference() {
+ sonar_holder_outline_2d(holder_radius,
+ between_sonar_centers);
+ sonar_holder_holes_2d(sonar_radius,
+ between_sonar_centers,
+ between_sonar_centers_variation); } }
+
+module binder_clip_holder_holes_2d(screw_radius) {
+ circle(screw_radius); }
+
+module binder_clip_holder_outline_2d(holder_radius) {
+ smaller_radius = holder_radius / 4;
+ inside_radius = holder_radius - smaller_radius;
+ offset(r = smaller_radius){
+ square([inside_radius * 2, inside_radius * 2], center=true); } }
+
+module binder_clip_holder_2d(holder_radius,
+ screw_radius) {
+ difference() {
+ binder_clip_holder_outline_2d(holder_radius);
+ binder_clip_holder_holes_2d(screw_radius); } }
+
+module binder_clip_holder(holder_radius,
+ screw_radius,
+ sonar_binder_clip_holder_height) {
+ linear_extrude(height = sonar_binder_clip_holder_height) {
+ binder_clip_holder_2d(holder_radius,
+ screw_radius); } }
+
+module sonar_binder_clip_holder_2d(sonar_radius,
+ between_sonar_centers,
+ between_sonar_centers_variation,
+ screw_radius,
+ wall_thickness) {
+ holder_radius = sonar_radius + wall_thickness;
+ sonar_holder_2d(holder_radius,
+ between_sonar_centers,
+ sonar_radius,
+ between_sonar_centers_variation);
+ arm_length = between_sonar_centers + 2 * holder_radius;
+ difference() {
+ translate([0, -holder_radius]) {
+ square([arm_length, holder_radius * 2]); }
+ sonar_holder_outline_2d(holder_radius, between_sonar_centers);
+ translate([arm_length, 0]) {
+ binder_clip_holder_outline_2d(holder_radius); } }
+ translate([arm_length, 0]) {
+ binder_clip_holder_2d(holder_radius, screw_radius); } }
+
module sonar_binder_clip_holder(sonar_radius,
- between_sonar_centers) {
- circle(sonar_radius);
- translate([between_sonar_centers, 0]) {
- circle(sonar_radius); } }
+ between_sonar_centers,
+ between_sonar_centers_variation,
+ screw_radius,
+ wall_thickness,
+ sonar_binder_clip_holder_height) {
+ linear_extrude(height = sonar_binder_clip_holder_height) {
+ sonar_binder_clip_holder_2d(sonar_radius,
+ between_sonar_centers,
+ between_sonar_centers_variation,
+ screw_radius,
+ wall_thickness); } }
/*
This file is part of challenge-bot.