hi there
i think that is not normal to do paper leveling after the auto bed leveling
all probing are good… but i do a first layer print test… and that sucks on mostly printed area… just 1 are good, the back left one… after paper adjust i can have 3 good print area… back left one, front left and right front… center and right back still not good… but can’t adjust them
someone did a firmware who using stall current instead of those 3 copper spot?
You can adjust the right-back by turning the front-left knob. Adjust until right-back and front-left are equal. Same for left-back and front-right knob. Then adjust the back-middle knob last if nececary. I think stallcurrent would probably not produce good results.
The bed leveling calibration is useless because it only levels the PCB which is pretty flexible. Once you clip the glass to it, the PCB flexes and conforms to the glass. We need a solution for z compensation based on the actual build plate.
I’ve not had issues with it. The bed is on a rigid, aluminum-backed frame.
What does prove a problem is if the three bed probe points don’t define the upper plane. On mine, they’re straight and level between points, and the back corners torqued down out of the way so these define where the bed sits when mounted.
Others mentioned on the Facebook group problems with the back corners being raised, which lifts the back corners of the glass above the probe plane nulling the leveling done at the probe points.
I just got done fighting to get a good first layer on a 300mm x 125mm print. A larger print like that will really show you how flat your build plate is lol. My back right corner was high and nozzle was scraping. Front right and the middle area were perfect. Whole left side was too low and could barely get filament to stick. Ended up having to shim the left side up with some paper to get a decent first layer. That was just after calibration.
I’ve also used the build plate corner to corner.
It may be worth checking with a straight edge if the back right corner sits higher than the plane defined by the probe positions.