X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=3d-printables%2Fsonar-table-top-holder.scad;h=bc7a96ba0baa8bd752657d7c93053c58f78890db;hb=3d90aff00bdea5d4a525d006d5390f9c5a25c635;hp=2073cc8bb0f05ddd69681c26ac1ecd425d613045;hpb=5aab55f75e3183629f99465245268a8b78a5170d;p=challenge-bot

diff --git a/3d-printables/sonar-table-top-holder.scad b/3d-printables/sonar-table-top-holder.scad
index 2073cc8..bc7a96b 100644
--- a/3d-printables/sonar-table-top-holder.scad
+++ b/3d-printables/sonar-table-top-holder.scad
@@ -4,81 +4,16 @@
 // https://gitorious.org/ozzloy/challenge-bot
 // https://github.com/waynegramlich/challenge-bot
 
-$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 - 0.7;
-
-deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
+/*
+  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.
+ */
 
-module sonars(){
-  translate([between_sonar_centers / 2, 0, 0]){
-    cylinder(r = sonar_radius, h = sonar_height);}
-  // for the variance with which the physical sonar cylinders are placed
-  translate([between_sonar_centers / 2 - between_sonar_centers_variance, 0, 0]){
-    cylinder(r = sonar_radius, h = sonar_height);
-    translate([0, -sonar_radius, 0]){
-      cube([between_sonar_centers_variance, sonar_diameter, sonar_height]);}}
-  translate([-between_sonar_centers / 2, 0, 0]){
-    cylinder(r = sonar_radius, h = sonar_height);}}
-
-module sonar_holder(){
-  elbow_length = deck_depth + 0.5;
-  difference(){
-    cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
-    translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
-      sonars();}}
-  translate([sonar_holder_length, 0, 0]){
-    cube([elbow_length,
-          deck_depth,
-          sonar_holder_depth]);
-    translate([elbow_length, 0, 0]){
-      linear_extrude(height = sonar_holder_depth){
-        polygon([[0, 0],
-                 [sonar_holder_depth, 0],
-                 [sonar_holder_depth, sonar_holder_width / 2],
-                 [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],
-                   [sonar_holder_depth / 2 + 1.7, 4],
-                   [sonar_holder_depth / 2 + 1.7, 0]]);}}}}}
+$fn = 60;
 
-module deck_holder(){
-  deck_holder_width = sonar_holder_width - deck_depth;
-  linear_extrude(height = deck_holder_width){
-    difference(){
-      square([deck_holder_length, sonar_holder_depth * 2 + deck_depth]);
-      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]);}}}}
+include <sonar-table-top-holder-data.scad>
 
-deck_holder();
-translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){
-  sonar_holder();}
+sonar_holder();