Printing shifts above certain height


the wall should be flat and vertical but it began stepping to the right above 27mm. I think the nozzle began scratching the surface and it was getting worse and worse as the printing got higher and higher.
Has anybody any idea what causes the problem and any suggestions on how to fix it?
Thank you

Hy,
if the voltage of your drivers are arround 0.425 you must increast it arround 0.5 -> 0.55

Tag is correct,
But if it’s happening after awhile of printing it looks like the voltage maybe set to high and the drivers are over heating.
0.55 works best but do not go over 0.60

thank you for your quick help.
I adjusted the voltages to 0.55 volts on all motor drivers. (They were set to 0.45V) I also spent more time on bed levelling and retried printing the same object. The printing went better and could finish but there were still some intimidating moments. I think the nozzle was still hitting the top at certain layers. The whole bed was vibrating/shaking really bad and it was just moving along the y axis when it did that. After 20/30 layers or so it stopped doing it at about a height of 30mm. In manual control i tried to raise the z-axis by 0.1mm but the manual instruction was ignored.
The layer height in slicer was set to 0.23mm. The bed was levelled to approx 0.25mm as suggested in the velleman procedure. I’m just wondering if i levelled the zero point of the bed higher to 0.3 or 0.35 could that eliminate the problem or not. Or try to set thicker layers in slicer for instance 0.4mm layer height.

The other problem i saw that the part was really fragile. When i was removing the support material certain parts just broke off. The hotend temperature was set to 190 Celsius degree. As far as i heard higher temperatures give more strength to the part. The perimeter of vertical shell were set to 5 that looks enough. The infill was set to 0.05 that might explain the weakness as it can be too low. Should i set it higher 0.1 or 0.15?
thank you for any advice

I realized that this very strong vibration comes from how slicer constructs the infill making these very thin zigzag lines but i don’t know how to avoid it if it’s possible at all.

i have found the answer for my question. In slicer the gap fill option under the speed menu controls the speed of the extruder when making these very small zigzag moves. I set it to much lower value to avoid strong vibrations and resonance.