correct, it wasn’t an inertia thing (stepper powered off), it actively moved the bed down when the resume started after power came back on. It was a semi-tall print and about 98% done, so the bed was only 80-90mm from the bottom to start with. I could understand it dropping 10-20mm while the toolhead rehomed, but this went down down down and then kept going and grinding at the bottom. There should be some feedback mechanism like the Trinamic drivers have (sensorless endstop/stall detection). Anyways I hope I don’t have to retram the bed. Did another print, small cube to test and it looks good.
BTW, I would open a bug, but in the past it got ignored (for this very same issue). So I’m just putting it out there for the community in case anyone else comes across it.
The Timelapse for some reason didn’t record the print, but a single frame from when it powered back on and bottomed out:
I can confirm the same behavior, after a power loss i clicked resume
the bed on my side went slightly down (not much) the head homed and then the print resumed but it never reraised the bed so started printing mid air…
that is the only fail print i had since i got my H2D and it happened on something that should be handled (resume after power loss seems to be handled very well except from that lowering not reraising the bed)
Looks like they pulled the changelog on the wiki, I was hoping for a firmware release soon as this AMS 2 drying mode is terrible, I keep breaking the filament trying to tuck it away because it insists. it has to rotate during drying. At 65C that is not necessary. I have 70-75C external dryers that don’t rotate and never had an issue.
