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ScottW514 1e3b2716b7 BRINGUP: DRV8825 rail-glitch wedge, accel liveness, probe direction
Hardware facts from the 2026-08-11 bench session: the DRV8825 drivers
can come out of a 40 V rail power-up unserviceable (playback and
counters run, motors dead; recovery is a longer true power-off, at
worst a machine power cycle) - so counters/anchors are never proof of
motion and the rail stays up. The head accelerometer is the motion
truth (device mapping, bench-characterized thresholds, read-rate
limits), and every probe move goes +X first - a cable lives at the
end of left travel.
2026-08-11 20:01:24 -04:00
..
2022-10-06 09:48:02 -04:00