2+ Extended serious layer shifting

dmitriR · July 3, 2019

Ok so, Ive been using an Ultimaker 2+ Extended recently and after a big print Ive found a serious issue that has make the entire print useless.

It seems that, around 81mm or so, the entire print layer has shifted, massively, as can be seen below.

65584114_2439801259630910_58055579832072 66333695_461992864359592_168488017661106 65764668_421801178666026_901697678215007 65718135_713663452423739_404085536695359

What are the probably causes of this issue? Is it just the servo belts that potentially need tightening? Or is there possibly another issue that I need to resolve?
I also got an ER05 code, which has the Z-axis being broken, but I think that was due to me running out of filament, the other prints that I have done seem to be fine, but none of them approach the 80 mark

66176308_369460787262187_795534208441044

In addition to this issue, another piece that I printed is ugly and spotted with extra filment. Is there a particular cause for this? Or is it just because of neighboring prints?

For context, im using 0.8mm extrusion of 3mm PLA, 20% infill

Thanks in advance!