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What is the formula to calculate the step angle of a stepper motor?

What is the formula to calculate the step angle of a stepper motor? Correct Answer (360*ph)/nph

The step angle is given by (360*ph)/nph where ‘nph’ is the number of equivalent poles per phase or number of rotor poles, ‘ ph ‘ is the number of phases and ‘ n ‘ is the total number of poles in all phases.

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