Mechanical - phnxdrgn536/FLSun-v400 GitHub Wiki There are a couple mechanical elements you need to check and take care of first thing. Screws (These need to be checked for tightness but not over torqued) Belts (These need to be adjusted and tensioned so that they all three have the same tension as close as possible to each other) Stability (This is not as important but will help with print quality)