A stepper motor is an electric motor that rotates fix number of degrees whenever we apply a step signal.
the stepper motor can rotate 1.8-degree full step or 0.9 half step per step, then to move 360 degrees the number of steps required is 200 degree that is 1.8 x 200 steps = 360 degree.
Internally are stepper motor typically has 4 coils. To rotate the motor one step, we pass current through one or two of the coils.Thus rotating the motor 360 degrees requires current to the coils in a specified sequence.
Applying the sequence is a Reverse causes reverse rotation.
the stepper motor can be controlled in two ways:
1. using stepper motor driver
2. controlling a stepper motor directly
Application of stepper motor:
- disk drivers
- fax machine