3. Bipolar Stepper Motor

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Old scanner hacked and turned into smart mini elevator

Guillermo Perez GuillenGuillermo Perez Guillen 06/27/2022 at 20:240 Comments

To rotate a bipolar stepper motor, pulses are applied in sequence to the windings, the sequence of these pulses, are applied externally with an electronic controller. Said controllers are designed in such a way that the motor can be kept in a fixed position and also so that it can be rotated in both directions.

There are three characteristics that are common in stepper motors:

Here is a quick guide for Stepper Motor Wire Color And Coil Pairs.

However, color codes are not always respected by manufacturers. So a test allowed me to find that my stepper motor works at 5 volts. I also found by means of an ohmmeter the two coils and the order of the pins as follows:

These motors have several windings that, to produce the advance of a step, must be fed in a suitable sequence. By reversing the order of this sequence, the motor turns in the opposite direction. The next table shows the sequence to generate the CW (Clockwise) and CCW (Counterclockwise) movements of a bipolar motor.