Problem with comparison.
/Modules/PowerSupply/THERMOGEN01A/CAD/src/THERMOGEN_heat_reservoir.scad
0,0 → 1,59
heatsink_xsize = 50;
heatsink_ysize = 50;
heatsink_zsize = 50;
 
TEG_xsize = 30;
TEG_ysize = 30;
TEG_zsize = 5;
 
mount_hole = 3.5;
clearance = 0.175;
sealing_ring_width = 3;
wall_thickness = 10;
 
height = heatsink_zsize + wall_thickness;
 
 
difference () {
union (){
cube([heatsink_xsize+2*wall_thickness,heatsink_ysize+2*wall_thickness,heatsink_zsize+wall_thickness]); // overal plastic brick
// cube([heatsink_xsize+2*wall_thickness,heatsink_ysize+2*wall_thickness,heatsink_zsize+wall_thickness]); // overal plastic brick
}
 
translate ([wall_thickness-clearance, wall_thickness-clearance, wall_thickness-clearance])
cube([heatsink_xsize+2*clearance, heatsink_ysize+2*clearance, heatsink_xsize+2*clearance]); // hollow for heat sink and heat storage liquid.
 
translate ([((heatsink_xsize+2*wall_thickness)-TEG_xsize)/2 - clearance, ((heatsink_ysize+2*wall_thickness)-TEG_ysize)/2 - clearance, 0])
cube([TEG_xsize+2*clearance, TEG_ysize+2*clearance, wall_thickness]); // hollow for the thermoelectric generator
 
translate ([wall_thickness, wall_thickness, height-sealing_ring_width])
union () {
difference () {
minkowski() {
cube([heatsink_xsize, heatsink_xsize, sealing_ring_width]); // Rib for o-ring.
cylinder(r=wall_thickness/2,h=0.1);
}
 
translate ([sealing_ring_width/2, sealing_ring_width/2, 0])
minkowski() {
cube([heatsink_xsize-sealing_ring_width, heatsink_ysize-sealing_ring_width, sealing_ring_width]); // Rib for o-ring.
cylinder(r=wall_thickness/2,h=0.1);
}
}
}
/*
rotate([0,0,-45]) // hole for top part mounting nut
translate ([ 0, -y_size/3, thickness/3])
cube([6, 3, thickness], center = true);
 
rotate([90,0,-45]) // hole for top part mounting screw.
translate ([ 0, 1.8, 0])
cylinder (h = thickness + rim_height, r= mount_hole/2, $fn=20);
*/
}
 
// Heat reservoir cover
 
translate ([0, 0, 2*height])
cube([heatsink_xsize+2*wall_thickness,heatsink_ysize+2*wall_thickness,wall_thickness]);