I build my 3d printer following this yt series (https://www.youtube.com/watch?v=BPfFqAp ... _DPNh3KWgj) but I have an issue with Z axes step motor.
When I turn on my 3d printer and I go to Prepare > Move Axis > Move 1 mm > Move Z both z axes step motors try to turn themself but they can't.
It's not a eletrical issue, because I try both step motors without alone and they works.
If I try to turn them with hands, they do it, not smoothly (the others two step motor turn smoothly) but they turn.
I think the two lead screws doesn't turn correctly inside the z-axis nut.
Is it possible? If the problem is this, what I can do for correct the behaviour?
If not, what can be the problem? A settings, maybe?
The video series I mentioned above is not very clear and I'm not sure about how much millimeters lead screws must be inside the coupling or how much millimeters step motor must be inside the coupling. But, I said it before, with hands both step motors turn themselves correctly.
Help please
