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19-04-2016 #6
Last Activity: 28-05-2023
It looks to me that the leadscrew for the Z axis is not clamped at one end (it should be floating in one bearing and fixed in the other)
Here's a a couple of photos to show what I mean.
It looks as though your machine is using the stepper motor to 'fix' the Z screw. However the type of coupling you are using negates this option.
It is bad design to use the thrust bearings in a stepper and you should post some pictures of the leadscrew bearings at each end for us to check this out.
The 'Oldham' coupler you have is not designed to resist being pulled apart, which is what is happening and the whole leadscrew is slipping downwards.Last edited by cropwell; 19-04-2016 at 01:33 AM.
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