// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
+/*
+ this holds an hc-sr04 sonar sensor to a 3/16 inch deck.
+ http://fritzing.org/projects/hc-sr04-project
+ it can hold the sonar sensor either facing down, or forwards.
+ when facing down, it can detect if it passes over the edge of a table.
+ when facing forwards, it can detect and follow something in front of it.
+ */
+
$fn = 60;
-// 3/16 inch in mm deck_depth = 4.7625;
-// 1/4 inch in mm = 6.35
-// subtract a little to be a squeeze fit
-deck_depth = 4.7625 - 0.4;
-// sonar sensor measurements taken with calipers:
-// 10.82 in between, 42.33 outside, 15.82 diameter
-// measured diameter of 15.82 with calipers,
-// but when printed ends up being too small, so add some
-sonar_diameter = 15.82 + 0.6;
-sonar_radius = sonar_diameter / 2;
-sonar_height = 13.8;
-between_sonar_centers = sonar_diameter + 10.82;
-// 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_variance = 2;
-// keep at least this much plastic surrounding the sonar cylinder on all sides
-buffer = 3;
-sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer;
-sonar_holder_width = buffer + sonar_diameter + buffer;
-// sonar_holder_depth is deck_depth minus a little bit to make arm fit
-// into deck holder
-sonar_holder_depth = deck_depth - 0.8;
+include <sonar-table-top-holder-dimensions.scad>
+use <oshw.scad>
+oshw_dy = 120.366;
+oshw_dx = 133.888;
-deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
+module sonar_holder_2d() {
+ difference() {
+ square([sonar_holder_length, sonar_holder_width]); } }
module sonars(){
translate([between_sonar_centers / 2, 0, 0]){
cylinder(r = sonar_radius, h = sonar_height);}}
module sonar_holder(){
- elbow_length = deck_depth + 0.8;
+ elbow_length = deck_depth - 0.5;
+ rounded_corner_radius = buffer;
difference(){
cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
- sonars();}}
+ sonars();}
+ translate([sonar_holder_length,
+ sonar_holder_width,
+ 0]){
+ corner_rounder(rounded_corner_radius,
+ sonar_holder_depth,
+ "bottom-right");}}
translate([sonar_holder_length, 0, 0]){
- cube([elbow_length,
- deck_depth,
- sonar_holder_depth]);
+ cube([elbow_length, deck_depth, sonar_holder_depth]);
translate([elbow_length, 0, 0]){
linear_extrude(height = sonar_holder_depth){
- polygon([[0, 0],
+ polygon([[ 0, 0],
[sonar_holder_depth, 0],
[sonar_holder_depth, sonar_holder_width / 2],
- [0, sonar_holder_width / 2 + sonar_holder_depth]]);}
+ [ 0,
+ sonar_holder_width / 2 + sonar_holder_depth]]);}
translate([0, (sonar_holder_width + sonar_holder_depth) / 2, 0]){
cube([sonar_holder_depth / 2,
(sonar_holder_width - sonar_holder_depth) / 2 + 0.8,
sonar_holder_depth]);}
translate([-1.7, sonar_holder_width + 0.8, 0]){
linear_extrude(height = sonar_holder_depth){
- polygon([[0, 0],
+ polygon([[ 0, 0],
[sonar_holder_depth / 2 + 1.7, 4],
[sonar_holder_depth / 2 + 1.7, 0]]);}}}}}
module deck_holder(){
deck_holder_width = sonar_holder_width - deck_depth;
+ deck_holder_height = sonar_holder_depth * 2 + deck_depth;
linear_extrude(height = deck_holder_width){
difference(){
- square([deck_holder_length, sonar_holder_depth * 2 + deck_depth]);
+ square([deck_holder_length, deck_holder_height]);
translate([sonar_holder_depth, sonar_holder_depth]){
square(deck_depth);}
- translate([sonar_holder_depth * 2 + deck_depth, sonar_holder_depth]){
- square([deck_holder_length - (sonar_holder_depth * 2 + deck_depth),
- deck_depth]);}}}}
+ translate([deck_holder_height, sonar_holder_depth]){
+ square([deck_holder_length - (deck_holder_height), deck_depth]);}}}
+ translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2])
+ scale([0.1, 1, 0.1])
+ rotate(v = [1, 0, 0], a = 90)
+ rotate(90)
+ linear_extrude(height = 0.5)
+ oshw();
+ translate([deck_holder_length - oshw_dy * 0.05,
+ deck_holder_height + 0.5,
+ deck_holder_width / 2])
+ rotate(v = [1, 0, 0], a = 90)
+ rotate(90)
+ scale([0.1, 0.1, 1])
+ linear_extrude(height = 0.5)
+ oshw();}
+
+module corner_rounder_2d(radius, corner_name="top-left"){
+ rotate_for_corner = (corner_name == "top-left") ? 0 :
+ ((corner_name == "top-right") ? -90 :
+ ((corner_name == "bottom-left") ? 90 :
+ ((corner_name == "bottom-right") ? 180 :
+ 1 / 0)));
+ rotate(rotate_for_corner){
+ difference (){
+ square(radius);
+ translate([radius, radius]){
+ circle(radius);}}}}
+
+module corner_rounder(radius, height, corner_name="top-left"){
+ linear_extrude(height = height){
+ corner_rounder_2d(radius, corner_name);}}
-deck_holder();
-translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){
- sonar_holder();}
+sonar_holder();
projects / challenge-bot / blobdiff