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I bought a Haydon LC1574W linear actuator for a small project I'm working on. I have an A4988 Pololu stepper motor driver, is it possible to control the Haydon linear actuator using this stepper motor driver?

So far I have connected the stepper driver as explained in this article: http://howtomechatronics.com/tutorials/arduino/how-to-control-stepper-motor-with-a4988-driver-and-arduino/ I used the arduino 5v and GND to power the board as well as motor power.

However when I measure the voltage at the 2B,2A,1A,1B pins of the stepper motor driver they seem to be constant at 5.5V without the motor attached. I would expect these outputs to alternate and not all be at 5.5v. Is this normal?

  • How are you measuring the voltage? What are the current and resistance or voltage ratings of the motor? You should spend some time reading the A4988 data sheet and understanding chopping drives in general. – Chris Stratton Apr 23 '16 at 8:36
  • Using a multimeter. More info on the linear actuator: haydonkerk.com/LinearActuatorProducts/… I have the 4V - 0.2A one (I did not connect the motor to the A4988 yet). – user3027128 Apr 23 '16 at 8:44

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