Thanks for the suggestion.
Yes, the lead screw is straight - I rolled it on plate glass - it's definitely straight.
I noticed, when looking down the hole over the lead screw, that the brass fitting that is the screw mount for the lead screw does not line up with the middle of the coupling over the Z-motor. The brass coupling hole is a few mm forward, which would push the lead screw forward, into the block. This could be the root of the problem. I cannot tell why this is. Any ideas?
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mr_seeker 0
Part 8B
Is the lead screw straight? Try rolling it on a flat surface.
There has been a replacement part 8B sent from UM. Normally you need 2 parts 8B, but sometimes they ship with a spare part (with a drilled hole).
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