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ScottW514
1c56427cae
SAFETY: the chain de-energizes itself behind a pause without being asked - the charge-pump feed ends with the run, so HV_ENABLE drops with the watchdog about half a second in, and on the resume it is back ~216 ms before the first step (pad measurements). A pause is deliberately not a cancel: the latch stays unlocked and the window open, which is what lets the next press resume the job, while emission still ends because the stream stops driving FIRE. The disarm grace counts down through a hold, so a job left paused disarms itself, and a lid or interlock open while paused takes the cancel path - nothing resumes past an enclosure opening. LIGHTBURN: the two things an operator needs before pausing a cut - the resume restarts from where the deceleration ended and accelerates from a standstill, which M3 shows as a deeper spot and M4 mostly hides, and a job left paused disarms itself and asks for the button again. Stop leaves the head where it stopped; returning to the job start belongs to the lid and interlock policy alone.