I wanted to share this in case it saves someone else a damaged plate. I run a thick, ridged steel build plate on my X2D for print requirements the stock PEI sheet doesn’t handle well. This isn’t an unusual setup — plenty of people run thicker or custom plates for specific materials/geometries.
After running a regular calibration followed by the High-Temperature Bed Leveling routine, the toolhead scraped directly into the plate right as the leveling sequence started. I have video of it happening. This has now happened on two separate plates running the same sequence on two different printers. I didn’t catch it the first time it happened otherwise I obviously wouldn’t have run the same routine again on a second printer/plate.
I’m curious whether the high-temp leveling routine assumes a fixed/stock plate thickness for its Z-height reference, rather than probing or adjusting for plate variation. If so, that seems like a real risk for anyone running a plate that isn’t the stock Bambu or similar sheets.
If you’re running a thicker or custom plate, I’d be cautious running high-temp bed leveling until this is better understood. Curious if anyone else has hit this or knows how the routine actually determines starting height.