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Topic: SLA7026 - stepper driver (Read 2 times) previous topic - next topic

michaelb01

Does anyone have any experience with the SLA7026M unipolar stepper motor driver working with Arduino? I'm using a 2A, 6 wire unipolar stepper motor, and i'm supplying it with +12V. I got it working earlier but now the motor doesn't want to rotate properly - it just steps backwards and forwards!
Could anyone help me out with schematics they may have used in the past?

Cheers,

Michael

Grumpy_Mike

Post what you have got and we will tell you how to fix it. If it did work you probably have them wires mixed up.

michaelb01

#2
Apr 06, 2011, 01:06 am Last Edit: Apr 06, 2011, 01:14 am by michaelb01 Reason: 1
Thanks for the reply Mike. Here is a quick Eagle schematic I made (my first post so hopefully this will link properly?) - http://www.flickr.com/photos/61504193@N08/5593139631/

I assume it is something stupid like confused wires but I've been over it so many times and still no success!

The input pins connect to 4 Arduino pins. The two common wires of the stepper are connected to +12V. The off-time delay pins don't seem to have any effect if they're connected or not.

I guess you need to look at the SLA7026M datasheet really (don't know how I can link that), but i'm driving it in Full Step operation according to the datasheet, which is:

Sequence         0       1       2       3       0
Input A            H       L       L       H       H
Input notA       L       H       H       L       L
Input B            H      H      L        L       H
Input notB       L       L       H       H       L

Hope this helps?


michaelb01

Does anyone have any suggestions?

Khalid

I have used SLA062M based unipolar stepper driver.. you just to give it pulses through Arduino using any 2 pins. One for direction and one for steps. the ground of SLA should be common to Arduino.
Regards

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