X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=3d-printables%2Fsonar-table-top-holder.scad;h=23279e40736dbab68368ba2076d4f6a0c7e70093;hb=refs%2Fheads%2Fdevelop%2Fj;hp=d34c694c7c675f18516a3c0c345b81c63cb52878;hpb=8b84f6f3989f657fd317184d16ecf8a72555253b;p=challenge-bot

diff --git a/3d-printables/sonar-table-top-holder.scad b/3d-printables/sonar-table-top-holder.scad
index d34c694..23279e4 100644
--- a/3d-printables/sonar-table-top-holder.scad
+++ b/3d-printables/sonar-table-top-holder.scad
@@ -4,32 +4,24 @@
 // 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]){
@@ -43,42 +35,76 @@ module sonars(){
     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();