@joeatwork said in Can I use a Negative Y value in bed.g?:

@deckingman do you know if the G31 X and Y offsets are being used to position the head or are they used to calculate the bed height map relative to the nozzle and not the height sensor (where the readings are taken)?

I believe the height map would be relative to the nozzle if an XY probe offset is used but I don't use any form of bed compensation so can't be sure. No doubt, someone more knowledgeable about that will chime in if I'm wrong.