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z-axis squeak

I have a tremendous squeak on the Z-axis - After investigating, it seems to be coming from the threaded rod rubbing against the plastic retainer at the top of the Z.  

Is there a way to straighten the rod or something to help fix the root cause?

1 Comment

Seems that we experienced a different source of Z-axis squeak: We put a few drops of 3-in-one dry lube on the two vertical rails and that helped it a lot.

We had a similar problem and solution for the x axis

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