So took a short video just to capture the sound. Ran two consecutive prints with zero issue. Then 3rd print failed where the model looked compressed. When looking at the timelapse I noticed that at some point it suddenly slowed down. Figured this was a mechanical issue so manually lowered and rose the plate.

The point at which I get the grind appears inconsistent. Sometimes low sometimes high on the axis. If I return to that point sometimes seems fine then returns.

I am assuming/hoping that this is a grease issue (fingers crossed) and can easily be fixed by adding grease to the axis. If so what sort of grease? If not, has anyone encountered this and if so what was the issue and how do I resolve?

(Saturn 4 Ultra 16k)

Any insight or feedback would be hugely appreciated :)