Geeetech

I think I have found the problem, I just disassemble the left wheel up, and the wheel on the bottom left turn by hand. The holes for the screw do not align, can we correct that?

Thanks

This is a picture

Hi, Are you referring to the screw type mismatch?
You can get in touch with your sales to replace it.

is not in front of the hole

You can change the bearing wheel to change this situation.

Hi,
I changed the wheel and the supports. And I still have the same problem
you don't have another solutions ?
Thank's.

Hi, You can check if your z-axis threaded rod is bent or missing;
Check if your brass nut is too tight and loosen properly;
Check if the bearing or the pulley is issued (issued with lubrication and lubricated).

Thank you for your help

Sorry, when I say that I still have the same problem I talked about the screw that does not fall in the face of the hole, for all I changed by new supports.

Regard's

Oh, I refer to the threaded rod of the z-axis and the tightness of the brass nut.
such as:

I did not understand you answer, you want a picture of my Z axis.