I have my vertex delta one week. I have done some good prints but all the last prints fails.
I think the problem is the PU-belt that slips on the pulley when the printhead moves over te print.
https://we.tl/t-PyA8Mdunbt This is an example of a print
We have tighten the Pu-belt multiple times with two persons.
What could be any solution for this problem?