hold sonar sensor and robot deck press fit

* sensor holder has correct radius, correct gap between circles
* deck holder is press fit on robot deck of 1/4 pegboard
* still need to make deck holder work for 3/8
* still need to make sonar holder match to deck holder, possibly
   it does now with the 0.3 spacing and subtraction

diff --git a/sonar-table-top-holder.scad b/sonar-table-top-holder.scad
index 1e8b6e70892185dabfbed7cf63cf01c3cecf06f2..9cb881de5609da37309af24bcb85dd60511fba9d 100644 (file)
--- a/sonar-table-top-holder.scad
+++ b/sonar-table-top-holder.scad
@@ -10,19 +10,20 @@ $fn = 60;
 // 1/4 inch in mm - a little to be a squeeze fit
 deck_depth = 6.35 - 0.4;
 sonar_plate_width = 20;
-sonar_plate_length = 45;
 // sonar sensor measurements taken with calipers:
-//  9.6 in between, 41.33 outside, 15.82 diameter
+//  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
 sonar_sensor_radius = 15.82 / 2 + 0.3;
 sonar_sensor_height = 13.8;
-between_sensor_centers = 15.82 + 9.6;
-
+between_sensor_centers = 15.82 + 10.82;
+sonar_plate_length = 3 + between_sensor_centers + sonar_sensor_radius + 3;
 sonar_holder_length = sonar_plate_length + 10;
 sonar_holder_width = sonar_plate_width + 3;
-sonar_holder_depth = 3;
+sonar_holder_depth = 4;
 
+deck_holder_length = 30;
+deck_holder_width = sonar_holder_width;
 
 module sensors(){
   translate([between_sensor_centers / 2, 0, 0]){
@@ -30,14 +31,28 @@ module sensors(){
   translate([-between_sensor_centers / 2, 0, 0]){
     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
 
+module sensor_holder(){
+  difference(){
+    cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
+    translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
+      sensors();}}
+  translate([sonar_holder_length, 0, 0]){
+    cube([sonar_holder_depth + 0.3, deck_depth - 0.3, deck_depth - 0.3]);
+    translate([sonar_holder_depth + 0.3, 0, 0]){
+      // subtract a little bit (0.3) to make it fit
+      cube([deck_depth - 0.3, sonar_holder_width, deck_depth - 0.3]);}}}
+
 module deck_holder(){
-  deck_holder_length = 25;
-  deck_holder_width = sonar_holder_width;
-  cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);
-  translate([0, 0, sonar_holder_depth]){
-    cube([deck_depth, deck_holder_width, deck_depth]);
-    translate([0, 0, deck_depth]){
-      cube([deck_holder_length, deck_holder_width, sonar_holder_depth]);}}}
+  cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);
+  cube([sonar_holder_depth,
+        sonar_holder_depth * 2 + deck_depth,
+        sonar_holder_width]);
+  translate([0, sonar_holder_depth + deck_depth, 0]){
+    cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);}
+  translate([sonar_holder_depth + deck_depth, 0, 0]){
+    cube([sonar_holder_depth,
+          sonar_holder_depth * 2 + deck_depth,
+          sonar_holder_width]);}}
 
 module sonar_table_top_holder(){
   difference(){
@@ -58,5 +73,4 @@ module sonar_table_top_holder(){
       translate([between_sensor_centers, 0, 0]){
         cube([10, 6.1, sonar_holder_depth + .1], center = true);}}}}
 
-rotate([90, 0, 0]){
-  sonar_table_top_holder();}
+sensor_holder();