Z artifacts (3D printer)
Hey Tyler (if you’re a member here),
I discovered something else that can cause artifacts on the Z axis.
When you use a helical coupler to join the stepper motor and the Z-axis lead screw, you want to make sure that the lead screw is actually touching the stepper shaft (inside the coupler).
If they aren’t touching, then resistance in Z can cause the helical coupler to compress and expand, which causes artifacts.
Just something else to check.
I’ll give him a poke tomorrow if he doesn’t see it.
Hmmm, I wouldn’t have thought about that. Are you using something other than helical couplers? I’ll take a look and check the lead screws. Thanks for the heads up.
@teastman The MM3 also uses helical couplers, and somebody on the MM3 list had some Z artifacts that looked very similar to yours:
and the MM3 guys explained that that’s why their build instructions say that the leadscrew should touch the stepper shaft (otherwise the couplers will compress).