Stepper motor controller Technology Overview

The driver receives step and direction signals from the indexer or stepper motor controller and converts them into electrical signals to run the stepper motor. One pulse is required for every step of the motor shaft.

In full step mode, with a standard 200 stepper motor, 200 step pulses are required to complete one revolution. The speed of rotation is directly proportional to the pulse frequency. Some control systems have an on-board oscillator which allows the use of an external analog signal or joystick to set the motor speed.

Speed and torque performance of the stepper motor driver for sale is based on the flow of current from the driver to the motor winding. The factor that inhibits the flow, or limits the time it takes for the current to energize the winding, is known as inductance. The effects of inductance, most types of control circuits are designed to supply a greater amount of voltage than the motor's rated voltage.

The higher the output voltage from the controller, the higher the level of torque vs. speed. Generally, the driver output voltage (bus voltage) should be rated at 5 to 20 times higher than the motor voltage rating. In order to protect the motor from being damaged, the stepper motor drive should be current-limited to the stepper motor current rating.

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