From bc750455ce18651fca4a746ceaff591d97aca93a Mon Sep 17 00:00:00 2001
From: daniel watson <ozzloy@gmail.com>
Date: Wed, 13 Nov 2013 23:39:44 -0800
Subject: [PATCH] switch to linear extrude for arm of sonar holder

---
 3d-printables/sonar-table-top-holder.scad | 43 ++++++++++++-----------
 1 file changed, 22 insertions(+), 21 deletions(-)

diff --git a/3d-printables/sonar-table-top-holder.scad b/3d-printables/sonar-table-top-holder.scad
index 6cf0042..e3535d9 100644
--- a/3d-printables/sonar-table-top-holder.scad
+++ b/3d-printables/sonar-table-top-holder.scad
@@ -19,12 +19,16 @@ sonar_sensor_radius = 15.82 / 2 + 0.3;
 sonar_sensor_height = 13.8;
 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;
+buffer = 3;
+sonar_plate_length =
+  buffer + between_sensor_centers + sonar_sensor_radius + buffer;
 sonar_holder_length = sonar_plate_length + 10;
 sonar_holder_width = sonar_plate_width + 3;
-sonar_holder_depth = 4;
+// sonar_holder_depth is deck_depth minus a little bit to make arm fit
+//  into deck holder
+sonar_holder_depth = deck_depth - 0.8;
 
-deck_holder_length = 30;
+deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15;
 
 module sensors(){
   translate([between_sensor_centers / 2, 0, 0]){
@@ -41,21 +45,20 @@ module sensors(){
     cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
 
 module sensor_holder(){
-  // arm_depth is deck_depth minus a little bit to make it fit
-  arm_depth = deck_depth - 0.7;
+  arm_depth = sonar_holder_depth;
   elbow_length = deck_depth + 0.8;
   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([elbow_length, deck_depth, arm_depth]);
-    translate([elbow_length, 0, 0]){
+  translate([sonar_holder_length - 1, 0, 0]){
+    cube([elbow_length + arm_depth + 1, deck_depth, arm_depth]);
+    translate([elbow_length + 1, 0, 0]){
       linear_extrude(height = arm_depth){
         polygon([[0, 0],
-                  [arm_depth, 0],
-                  [arm_depth, sonar_holder_width / 2],
-                  [0, sonar_holder_width / 2 + arm_depth]]);}
+                 [arm_depth, 0],
+                 [arm_depth, sonar_holder_width / 2],
+                 [0, sonar_holder_width / 2 + arm_depth]]);}
       translate([0, (sonar_holder_width + arm_depth) / 2, 0]){
         cube([arm_depth / 2,
               (sonar_holder_width - arm_depth) / 2 + 0.8,
@@ -68,16 +71,14 @@ module sensor_holder(){
 
 module deck_holder(){
   deck_holder_width = sonar_holder_width - deck_depth;
-  cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);
-  cube([sonar_holder_depth,
-        sonar_holder_depth * 2 + deck_depth,
-        deck_holder_width]);
-  translate([0, sonar_holder_depth + deck_depth, 0]){
-    cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);}
-  translate([sonar_holder_depth + deck_depth, 0, 0]){
-    cube([sonar_holder_depth,
-          sonar_holder_depth * 2 + deck_depth,
-          deck_holder_width]);}}
+  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]);}}}}
 
 translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){
   sensor_holder();}
-- 
2.30.2