24V steppers with motorshield v2

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avatardelta
 
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24V steppers with motorshield v2

Post by avatardelta »

I've been tearing apart printers for their steppers, and it appears most if not all run at 24V.

I would like to use one of my motorshield V2 to drive these, but I understand those shields can't provide the proper voltage. Now, assuming I can power the stepper at the proper 24V, could I just insert mosfets between the stepper and the motorshield?

Here's a terribly quick sketch of what I'm imagining: http://imgur.com/OorYpl2

I imagine running the stepper will take a little bit of ingenuity. I've got FQP27P06 mosfets ( https://www.sparkfun.com/datasheets/Com ... P27P06.pdf )

Is this a pipe dream, or is it feasible?

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Re: 24V steppers with motorshield v2

Post by adafruit_support_bill »

You can run the motors on 12v. They should work, but have about 1/2 as much torque.

Your MOSFET solution will not work with a 4-wire bipolar motor, since the current needs to reverse through the entire coil - and would be flowing backwards through the MOSFET. That configuration would only work for unipolar motors.

Another option is the Synthetos gSheild: https://www.adafruit.com/product/1750

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avatardelta
 
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Re: 24V steppers with motorshield v2

Post by avatardelta »

I wasn't sure, thank you.

I'd do the shield, but at this point I need to shy away from extraneous purchases, even if it's from my favorite electronics vendor. I'll consider the unused torque as "future potential". :)

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