I have a Taig CNC mill I haven't used much as the Z axis movement get's stuck traveling in the minus, (down) direction. Moving up is never a problem. What happens is that when rapid moves are done in the minus direction I can first hear a vibrating sound and a second later the stepper seems to get stuck and gives up this screaming sound. I first thought that the gibs were too loose and that caused the vibration to start. Tightening did not make it any better and loosening did not fix it either. Did anyone have the same problem and how did you fix it?
Any help is appreciated!