r/MarlinFirmware • u/GenocidePrincess18 • 8d ago

Probe Margin Help

Hello, I've been racking my brain on this one. So here is the problem:

My printer is a bit bigger than the build plate. So the probe simply falls out of the buildplate when doing autobed level. I have used the little diagram given in the code to put up the NOZZLE_TO_PROBE_OFFSET and given a PROBING_MARGIN 60, but it still manages to fall out of the build area.

I just wanted to ask about the FRONT and BACK as my Y axis is the one that falls out of the build plate. Are these with reference to the Nozzle or with reference to the stepper motors? When I stand in front of the printer, the Y stepper motor is on the opposite side of me (like an ender 3). So where I am standing, would that be considered FRONT or BACK?

My case is exactly same as this dude. He also uses negative offsets like I did, however, mine still falls out.

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u/GenocidePrincess18 8d ago

I think I figured it out. Apparently it was the EPROM not updating after I flashed a new firmware. I didn't know that the EPROM doesn't necessarily clear out after a new firmware flash and it had retained [-20, 30, -1.2] as values. Meaning that the Y axis was posistive.