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Microstepping an A4988

Daftlander
By Daftlander
in Hobby Electronics
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Posted

So I've got a couple of a4988 stepper motor drivers. I would like to get them to microstep my NEMA 17 using an arduino and DragonFrame motion control.

I have a rough idea of what I have to do. Power the MS1 MS2 and MS3 pins... but how much do they need. Do I need to power the enable pin? Or does that need connecting to the arduino. 

 

I've attached the Datasheet. 

Give us a hand if you can. 

Thanks.

A4988-Datasheet.pdf

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Posted

The data sheet says the ms1-3 pins are powered by logic level voltage which is listed as anywhere between 3 volts min and 5.5 volts max. Perfect for the 5 volt or 3.3 volt logic level you deal with when using Arduino. As for the enable pin, it's pretty self-explanatory. It just enables the driver so you can start moving your motor.

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