Small amount of Z-banding on MK2.
I found that this is a bit more than it was about a year and a half ago when I got it. I think the belts stretched a bit. The X-belt when moved all the way to side makes a small, low note, but not very loud. The bottom belt doesn't make a noise when plucked when moved all the way back and a sort of harsh one when moved about in the middle. I got a pre-assembled printer also. Is this within normal spec or do my belts need tightening and how do I do that if I need to.
Re: Small amount of Z-banding on MK2.
Tighten and check.... this could be belts, bearings, could be extrusion... could be filament tension on spool. could be a bunch of stuff... but looking at any print at that angle under the light can be revealing of inconsistent layers on any machine even if it looks fine in normal cases. slicer path's can affect it too since you must extrude the exact amount of plastic, exact... to have good consistent layers which unfortunately is easier said than done.