more designs

cooling_tube_splitter_bus.scad

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+// fitting params
+fitting_inside_diam_top = 66;
+fitting_inside_diam_bottom = 61;
+fitting_length = 23;
+
+wall_thickness = 2.5;
+curve_angle = 30;
+
+$fn=100;
+module fitting(r_in, r_out, length){
+    rotate(90,[1,0,0])
+    difference(){
+        linear_extrude(length)
+        circle(r=r_out);
+        linear_extrude(length)
+        circle(r=r_in);
+    }
+}
+
+function custom_y(w, angle) = (w/2-w*(1-cos(angle)))/tan(angle)+w*sin(angle);
+
+module one_side(r, w, angle){
+    rotate_extrude(angle=angle)
+    translate([w/2,0,0])
+    circle(r=r);
+
+    y = custom_y(w, angle);
+    translate([w/2,y,0])
+    rotate(angle)
+    mirror([1,0,0])
+    rotate_extrude(angle=angle)
+    translate([w/2,0,0])
+    circle(r=r);
+
+    tri_x = w/2-w*(1-cos(angle));
+    tri_y = tri_x/tan(angle);
+    length = sqrt(pow(tri_y, 2) + pow(tri_x,2));
+    rotate(angle,[0,0,1])
+    translate([w/2,length,0])
+    rotate(90,[1,0,0])
+    linear_extrude(length)
+    circle(r=r);
+}
+
+module split_shape(r, w, angle){
+    union(){
+        one_side(r,w,angle);
+        mirror([1,0,0])
+        one_side(r,w,angle);
+    }
+}
+
+my_w = fitting_inside_diam_top+2*wall_thickness;
+difference(){
+    split_shape(fitting_inside_diam_top/2+wall_thickness, 
+              my_w,
+              curve_angle);
+    split_shape(fitting_inside_diam_bottom/2, 
+              my_w,
+              curve_angle);
+}
+
+// one_side(fitting_inside_diam_top/2+wall_thickness, 
+//               my_w,
+//               curve_angle);
+
+translate([-my_w/2,0,0])
+fitting(fitting_inside_diam_top/2,
+        fitting_inside_diam_top/2+wall_thickness,
+        fitting_length);
+
+translate([my_w/2,0,0])
+fitting(fitting_inside_diam_top/2,
+        fitting_inside_diam_top/2+wall_thickness,
+        fitting_length);
+
+translate([0,custom_y(my_w, curve_angle)+fitting_length,0])
+fitting(fitting_inside_diam_top/2,
+        fitting_inside_diam_top/2+wall_thickness,
+        fitting_length);

tomato_stand_sticks.scad

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+thickness = 3;
+width = 3;
+length = 250;
+
+linear_extrude(thickness)
+square(size=[width, length], center=true);