I was thinking about my Z axis earlier, and why it would have seized when:


  1. It's as lubed as the others
  2. It's out of the way of debris
  3. It moves less than the other axis

So what's different..? The spindle. It's mounted on the opposite side of the same plate that the ballnut bracket is mounted to. That has to be it... Have the vibrations/resonance of the spindle been transferred through to the ballnut and caused this? Hmm. That would suggest a new screw would suffer the same fate, eventually. Maybe the Z nut needs more grease, more frequently than the others..?

Any thoughts?

Wal.