@curieos said in M911, Print not Resuming After Voltage Threshold is Reached:

That is highly unlikely, the buffer provides enough power for the M911 codes to be run to completion

Sorry, I forgot:

this is supposed to be a large, industrial machine that offers power loss recovery as a selling point.

As a Pro, you sure have monitored the 24V and 3.3V rails’ behaviour on the event of sudden power loss - a cheapo two-channel scope is all you need. What I know for sure is that the resume.g file is generated by RRF on an undervoltage event as long as the Duet’s electronics have sufficient power to stay alive long enough. And I can assure you: 4 secs are long enough.

OTOH, your 3-4 seconds buffer supplies 22V, so it is meant to feed all steppers and heaters (excluding the bed) as well? These devices are operated by strong pulses - a voltage plot over these 3-4 secs might be interesting 😊

@grudairian, increasing voltage from 12V to 14V will increase heater power by 36%. So definitely worth trying if bed heating is too slow. Remember to re-run heater tuning on both hot end and bed.