A stepper motor (or stepping motor) is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed. Stepper motors are used in a wide variety of applications, including robotics, CNC machines, 3D printers, and other precision positioning systems.
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