Stepper in one direction (sort of)

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1

Hi Team,

Setup:

Adrunio Uno

Stepper Motor: https://www.sparkfun.com/products/9238

Setup and wire diagram used: http://bildr.org/2011/06/easydriver/

Motor pair: Red/Green & Blue/Yellow

Issue:

Motor rotates fine (just like in the video) but only in one direction

Items checked:

dir pin soldered correctly and tried different jumpers

This code does the same thing: https://www.sparkfun.com/tutorials/400

swapping the motor leads (a-b c-d to c-d a-b) changes the direction of the rotation (which means there is no issue with the motor) but shows the same issue of only one direction.

Even this code (which uses pin 8 & 9 instead of 2 & 3) shows the same issue of only one direction.

Any ideas?

Thank you in advance.

2

Try hardwiring your dirpin input to the driver high and then low to see if the motor direction changes. If it doesn’t then you have a board problem.

3

Thank you Lyndon! I will give it a try.

4

I had the same issue briefly once I moved from breadboard to PCB. I found that my GND and DIR pins were switched. I flipped my cable to the correct positions and all is working great.

I also have a problem with my one Leo board. When I use pins 2 and 3 there is a short. I cannot use pin 2 and 3 at the same time.