Positioning encoder for 28BYJ stepper motor

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When the 28BYJ stepper is first powered up, its position is unknown. In addition, the motor does not rotate a specific angle per step; rather a full turn is often an unequal number of step pulses (e.g. it might take 2037.5 pulses per 360 degrees). Plus the motor gearbox can have indeterminate backlash.

This positioning sensor / encoder enables:

  • The setting of an initial position when first powered up
  • The control of the motor’s position during operation
  • Greater accuracy of positioning
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