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26-05-2010 #9
you need 66% of the total motor peak current... so 3 steppers at 4A/phase = 3 * 4 *.66 = 7.9A. @ 60v thats 420VA
remember that measuring phase current with an analogue device will show the RMS phase current. With a digital meter you are unlikely to get a useful reading because its highly spikey.
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