Printing goes sideways

Hi Forum,
after some printing last week my ali-express diy Kossel mini kit that i upgraded with an azteeg x5 mini v3 started getting an offset away from the alpha tower(or x tower how you like it). So all my prints just look weirdly shifted in one direction.
I thought that it maybe was a problem with the calibration (i tried everything else that came to my mind) and while calibrating the printer manually i noticed when i for instance moved from the beta tower straight to the alpha tower without homing inbetween the z position is easily 2mm lower than when i home the printer before.
Also has someone tried the network features on the azteeg I can’t figure out how to get them working.
Thanks in advance for answering

Imported from wikidot

Check if the pulley’s screw is tightened enough, and if the belt is tight enough.

Thanks Arthur
Yes it was either the pulley or the belt i’m not 100% sure but now it works.
Do you happen to know anything about the network stuff with the azteeg because there is the presoldered network jack but i can’t find the settings to activate it in the config