Friday, June 19, 2015

Side Project: Controlling a Stepper Motor with an Arduino

When disassembling the printer, some stepper motors were salvaged from it. A stepper motor consists of two main parts, a rotor and a stator. The rotor is the part of the motor that actually spins and provides work. The stator is the stationary part of the motor that houses the rotor. In a stepper motor, the rotor is a permanent magnet. The stator consists of multiple coils that act as electromagnets when an electrical current is passed through them. The electromagnetic coil will cause the rotor to align with it when charged. The rotor is propelled by alternating which coil has a current running through it.

Stepper motors have a number of benefits. They are cheap and easy to use. When there is no current send to the motor, the steppers firmly hold their position. Stepper motors can also rotate without limits and change direction based on the polarity provided.

A tutorial of how to operate these stepper motors with an Arduino was created and can be found here.

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