X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;ds=sidebyside;f=rocket.scad;h=3649fe197ee22a29efb64551cda57193d7c87a1a;hb=15e399685ee2fff2e43abe91aeb4ebf70f3b2e3c;hp=b0bf08834139e63eedfeab843734fba84e1df8af;hpb=538652f820660c5cedd6a843fc421e572e4536b2;p=things.git

diff --git a/rocket.scad b/rocket.scad
index b0bf088..3649fe1 100644
--- a/rocket.scad
+++ b/rocket.scad
@@ -2,19 +2,19 @@
 // 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;
 
-rod_diam = 4;
+rod_diam = 3.4 + 1;
 rubber_beam_height = 3;
 
 eps = 0.01;
@@ -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);
@@ -187,7 +187,7 @@ module central_tube() {
 	// rubber band holder
 	intersection() {
 		cylinder(r = motor_diam/2 + thick_wall - eps, h = central_tube_h);
-		translate([motor_diam/2-thin_wall, -infty/2,
+		translate([motor_diam/2 - thick_wall, -infty/2,
 			segment_overlap + thick_wall])
 			cube([thin_wall, infty, rubber_beam_height]);
 	};
@@ -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;