Hi everyone,

I am converting a WM16 with the stock leadscrews until I can afford ball screws. The X and Y axis work fine, and the Z axis works fine moving up but when it moves down there is a horrible noise. I dont think it is skipping steps as it seems to be accurate but I dont want to damage any hardware (and its annoying). The noise is worse when it is moving slowly and gets better when I tighten the Z axis locking screws slightly, but then it struggles to move up. I'm thinking of getting a gas spring to take some of the load off the motor. I am running LinuxCNC.

Any help would be great.
Thanks