Quote:
Originally Posted by alistairsam
That's pretty neat.
any details on the mcu used, is it a picaxe or is it just a 555, and the pulse frequency? what is the overall reduction.
Cheers
Alistair
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Yes it's a Picaxe microcontroller.
32 whole steps stepper motor with built-in 64:1 reduction gearbox.
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Coil "A" is energized for around ~13 milliseconds, then coil "B" for ~13milliseconds, then coil "c" for ~13milliseconds, then coil "D" for ~13 milliseconds, then repeat. Always repeat.
1 RPM rotation accuracy error = perfect at room temperature.
1 RPM accuracy error = -0.1second per hour at 4 degrees Celsius.
Tested electronically to a 100th of a second for 1 hour.