Maybe locknut pocket should be redesigned. It is a bit hard to find m3 locknuts in North America. I tried to use regular m3 nut and as a result it damaged the walls of the pocket and now spins freely.
A more easier to source design might have square nut instead of locknut — it will stay in place and it’s been used in prusa design, so anyone upgrading their printer might have a few spare.
If you don’t have dowel pin, you can use 2.8mm rod, 17mm length. Or use the following openscad design.
cube_dim = 5;
rod_h = 17;
difference(){
cylinder(d=2.8, h=rod_h, $fn=20);
translate([-cube_dim/2, 1,0])
cube([cube_dim, cube_dim, rod_h]);
}
Maybe locknut pocket should be redesigned. It is a bit hard to find m3 locknuts in North America. I tried to use regular m3 nut and as a result it damaged the walls of the pocket and now spins freely.
A more easier to source design might have square nut instead of locknut — it will stay in place and it’s been used in prusa design, so anyone upgrading their printer might have a few spare.