Z axis Problem. It lowers to the table when controller is turned off

[Eric]

See this thread:

Problem with Z Axis - Suddenly goes too deep mid-project

Couple of things to look at: https://www.avidcnc.com/support/troubleshooting/mach4ControlsProCnc/zAxis/#z-axis-height-lowers-unexpectedly-during-a-program There have also been reports of Z axis “drift” A solution that has helped some users is flipping z direction pin: [image]

Do you have a lot of weight on your Z axis? There’s a drag brake on there that should prevent that, but it might be getting overloaded or it’s worn out…