compensate for variance between centers of sensors

[challenge-bot] / 3d-printables / sonar-table-top-holder.scad

diff --git a/3d-printables/sonar-table-top-holder.scad b/3d-printables/sonar-table-top-holder.scad
index 55ba1c9ed8beb70aedfd6a26a4ee9381ce333747..4d8b5288816d17bfefc4aaa4374075548dd6ca9e 100644 (file)
--- a/3d-printables/sonar-table-top-holder.scad
+++ b/3d-printables/sonar-table-top-holder.scad
@@ -9,7 +9,7 @@ $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 = 6.35 - 0.4;
+deck_depth = 4.7625 - 0.4;
 sonar_plate_width = 20;
 // sonar sensor measurements taken with calipers:
 //  10.82 in between, 42.33 outside, 15.82 diameter
@@ -17,7 +17,8 @@ sonar_plate_width = 20;
 //  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 + 10.82;
+between_sensor_centers = sonar_sensor_radius * 2 + 10.82;
+between_sensor_centers_variance = 2;
 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;
@@ -28,6 +29,14 @@ deck_holder_length = 30;
 module sensors(){
   translate([between_sensor_centers / 2, 0, 0]){
     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
+  translate([between_sensor_centers / 2 - between_sensor_centers_variance,
+             0,
+             0]){
+    cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);
+    translate([0, -sonar_sensor_radius, 0]){
+      cube([between_sensor_centers_variance,
+            sonar_sensor_radius * 2,
+            sonar_sensor_height]);}}
   translate([-between_sensor_centers / 2, 0, 0]){
     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}