Inconsistent results with auto bed levelling. Creality ender 3 s1.

https://lemmy.dbzer0.com/post/564436

Inconsistent results with auto bed levelling. Creality ender 3 s1. - Divisions by zero

See attached photo for the results of the bed levelling test using superslicer’s calibration test. This is using the uhhh mriscoc firmware after heating to thermal equilibrium, tramming to tolerance, doing a 9x9 mesh which found a high point at the super messed up bottom left corner (higher than tramming result? but slightly further out). I have M420 S1 in my custom gcode, and for insanity’s sake checked the gcode of the part and it’s in the custom block and start block. Any ideas what’s going on? every other section is okay, although back right is a bit distant.

I had inconsistencies in my print on an Ender 3pro with sprite, no kind of manual or ABL level fixed it.

It turned out one of the eccentric v nuts in. my gantry was too tight, so it didn’t run smoothly - the right side of the gantry lagging to the left. (Ender 3pro has only one z screw)

So check for mechanical problems, lubrication of the z rod etc.

For the V wheels - they need to be adjusted so thight that you can just turn them manually with one finger then one ministep thighter.

If you check my edit the second it’s seeming that something like this might be the case?

Do you know if this problem sounds like a mechanical issue?