Stepper starts stepping on power

Using Arduino Motors, Mechanics, Power and CNC
1

hey
I'm using the AccelStepper.h library to turn a stepper a full rotation with a button push.
But I'm getting a weird behavior. when I apply power, the stepper takes a few steps before the loop even starts.
I've defined an enable pin and last line in the setup is enableOutput. (yes I remembered to change inverted pin for the enablePin. using a4988).
This problem returns even when I'm using a slightly modified example.

Could this be a fault in the driver itself?
Thanks in advance

2

During bootup the pins usually float. Stepper drivers with direct logic inputs can catch false signals if connected to floating wires. Try to add a pulldown resistor to the step pin.

3

thanks :slight_smile:
do you know what range of values should I try first?

4

Something from 1k to 10k should be Ok.

5

worked as expected. Thank you!

6

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