Shifting error at same height on UMO

[thixio1 0]

Strange shiftig occurs after a certain height of the prints. In the attached images observe the flawless printing for the small brain, while the large brain suffers from artefacts starting from a certain height. Also, the belt of the motor on the back left gets loose every time, although I straightened it by pushing down the motor and fixing it by tightening its screws like hell.

Any ideas or suggestions would be highly appreciated!

Marc

[IRobertI 521]

You have already posted two threads about the same issue but never responded to the replies:

https://ultimaker.com/en/community/view/17297-printing-shifting-problem

https://ultimaker.com/en/community/view/17327-strange-shifting-problem-with-prints-on-umo-

I'm going to close this one.