Layers not aligned x and y
Hello everyone. I assembled.my printer quite a while ago, but it has had this problem the whole time. There is a very very slight alignment problem in the layers. Please see photos. It is a 20mm cube printed in pla with .05 layer height
Check your pulleys. It could be a loose belt so has skipped a tooth but its far more likely the pulleys are not tight.
The pulleys use 2 small grub screws. The first must be gradually tightened against the flay on the stepper motor shaft. It must be perfectly perpendicular to the flat too and not at any angle. Once the first is tight you then tighten the second screw. This is often referred to as a 'set' or 'lock' screw as that is what it does. It locks the first in place.
If this order is not done properly then over time the pulley will loosen and wobble. That leads to little layer shifts as the print direction changes. The looser it gets the bigger the shift.
When loosening a pulley you should also do the screws in reverse order, so loosen the set screw first and then the one against the flat.