Tachometers and speedometers on contemporary vehicles are often driven by stepper motors. On startup they go through a self calibration to find a known rotary position. I'm trying to find out how that is typically done. There seems to be a few possibilities: Drive the needle to a stop at max scale…

stepper position calibration

Grumpy_Mike July 24, 2013, 6:59pm 7

Well done for getting it going.

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