Waste Board flattening - gone wrong. But why? (Solved, needs trammed)

[OnefinityCNC (Onefinity Support)]

ballscrew isn’t an issue. This is something called ‘tram’ or ‘tramming’ and has been talked about extensively on the forums here:

Tramming - Front To Back

There are a few methods to tram your machine. Loosening some z mount bolts, using 123 blocks, tram arms, folded pieces of tin foil, are all methods that can have acceptable outcomes. Left to right tram is relatively easy to correct. Front to back is a bit harder. There is a unique benefit of buying a Onefinity CNC machine is that every Onefinity machine has built in front to back tramming bolts on the X axis. These allow for tilt of the z slider front to back. There are 4 bolts on each foo…

and

https://forum.onefinitycnc.com/search?q=tram

and:
https://forum.onefinitycnc.com/search?q=tramming