Hi Motoxy,

So the problem was a bad ballnut, or a resonance with the steps or both? Would you link the relevant part in your build log, please?


Hi Jazz, what you describe in your last sentence is exactly what I did to align it. The holes are over-sized because I couldn't align the ballnut mount perfectly during construction. After doing the alignment procedure you describe that it makes the horrible sound even though it all looks true. However bare in mind it always does it in one direction only. It certianly seems like the moment force in that direction (nut pulling the z gantry rather than pushing) causes the resonance.

Yes with only one end fixed the other end bobs around as the Z gantry moves.