rocket.scad: more mods

diff --git a/rocket.scad b/rocket.scad
index b0bf08834139e63eedfeab843734fba84e1df8af..bc763e947cfba8b7996f5705abd54470c73a2a76 100644 (file)
--- a/rocket.scad
+++ b/rocket.scad
@@ -2,14 +2,14 @@
 // The Estes A8-3 and C6-7 motors have diameter of 17.7 mm,
 // length 69.5 mm. The Estes Alpha launch pad has rod diameter 3.4 mm.
 
-motor_diam = 17.7 + 0.7; // add some tolerance
+motor_diam = 17.7 + 0.5; // add some tolerance
 motor_len  = 69.5 + 0.5;
 motor_wall = 2;
 
 segment_overlap = 15;
 
-thin_wall = 1.0; // depends on the print width
-thick_wall = 2.5*thin_wall;
+thin_wall = 0.9; // depends on the print width
+thick_wall = 2.2*thin_wall;
 
 clip_spring_angle = 45;
 clip_spring_depth = 20;
@@ -68,9 +68,9 @@ module motor_module_solid()
        // protrusions to hold the main tube in place
        for (a = [60, 180, 300]) {
                rotate([0, 0, a]) {
-                       translate([motor_diam/2 - thin_wall, 0, 0])
+                       translate([motor_diam/2 + thick_wall - thin_wall/2 - thick_wall, 0, 0])
                                cylinder(r1 = thick_wall-thin_wall/2, r2 = thick_wall, h = segment_overlap/3 + eps);
-                       translate([motor_diam/2 - thin_wall, 0, segment_overlap/3])
+                       translate([motor_diam/2 + thick_wall - thin_wall/2 - thick_wall, 0, segment_overlap/3])
                                cylinder(r = thick_wall, h = 2*segment_overlap/3 + eps);
                };
        };
@@ -140,7 +140,7 @@ module motor_module() {
                                translate([0, 0, motor_len - segment_overlap - 2*thick_wall])
                                        cylinder(r1 = motor_diam/2 + thin_wall, r2 = motor_diam/2, h = thick_wall + eps);
                        };
-                       for (a = [60, 180, 300]) rotate([0, 0, a])
+                       for (a = [0, 120, 240]) rotate([0, 0, a])
                                translate([motor_diam/2 + 2.5, 0, -eps])
                                        cylinder(r = 3, h = infty);
                };
@@ -153,7 +153,7 @@ module motor_module() {
                };
                translate([0, 0, motor_len - eps])
                intersection() {
-                       cylinder(r = motor_diam/2 + thin_wall,
+                       cylinder(r = motor_diam/2,
                                h = thick_wall + 2*eps);
                        rotate([0, 0, -clip_spring_angle/2+eps])
                                cube(infty);
@@ -171,7 +171,7 @@ module motor_module() {
 
 // -------------------- CENTRAL TUBE ---------------------
 
-central_tube_h = 80;
+central_tube_h = 85;
 
 module central_tube_solid() {
        cylinder(r = motor_diam/2 + thick_wall, h = central_tube_h);
@@ -275,14 +275,16 @@ module thread_holder() {
 
 // thread_holder();
 
+/*
 // debug
 difference() {
        // front_cone();
        // central_tube();
-       // motor_module();
+       motor_module();
 
-       // translate([0, 0, -eps]) cube(infty);
+       translate([0, 0, -eps]) cube(infty);
 };
+*/
 
 // production
 $fn = 128;