![]() The unipolar or bipolar stepper is controlled by using digital pins 8, 9, 10, and 11 in conjunction with either a U2004 Darlington Array (for unipolar steppers) or a SN754410NE H-Bridge (for bipolars). In this example, the turns of a potentiometer (or other sensor) on analog input 0 are used to control the movement of a stepper motor while using the Arduino Stepper Library. For more information about the differences of the two types, and about the circuits that must be built to control a stepper, please take a look at Tom Igoe's page on stepper motors. There are two types of steppers, Unipolars and Bipolars, and it is very important to know which type you are working with. The NEMA 17 is a widely used class of stepper motor used in 3D printers, CNC machines, linear actuators, and other precision engineering applications where accuracy and stability are essential. The shaft of a stepper, mounted with a series of magnets, is controlled by a series of electromagnetic coils that are charged positively and negatively in a specific sequence, precisely moving it forward or backward in small "steps". Arduino Nano controlling all pins of A4988 Driver Module / Stepper Motor NEMA17. ![]() Stepper motors, due to their unique design, can be controlled to a high degree of accuracy without any feedback mechanisms. Learning Examples | Foundations | Hacking | Links ![]()
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