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Stepper Motor HAT - Power Issue
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Stepper Motor HAT - Power Issue

by cschron on Sat May 14, 2022 7:07 pm

I have the Stepper Motor HAT for Raspberry Pi and am having power supply issues.

Everything works great when I power the controller with my bench top power supply. However when I try to power the controller with an external wall power supply (12V 5A). Strange things happen the green power light will just flash. The stepper motor when it works just pulses. I have tried 3 different power supplies and same thing happens with all of them. When I use bench power supply and works great.

Thoughts?

Thanks!!

cschron
 
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Re: Stepper Motor HAT - Power Issue

by adafruit_support_bill on Sat May 14, 2022 7:13 pm

What stepper motors are you using?

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Re: Stepper Motor HAT - Power Issue

by cschron on Sat May 14, 2022 7:49 pm

STEPPERONLINE Nema 17 Stepper Motor Bipolar 2A 59Ncm(84oz.in) 48mm Body 4-lead W/ 1m Cable and Connector compatible with 3D Printer/CNC

https://www.amazon.com/Stepper-Motor-Bi ... B00PNEQI7W

Thanks!!

cschron
 
Posts: 9
Joined: Fri Dec 11, 2015 9:44 am

Re: Stepper Motor HAT - Power Issue

by adafruit_support_bill on Sun May 15, 2022 6:02 am

The motor specs are incomplete, but from what is there it looks like that motor is not compatible with the HAT.
Rated current 2A & resistance 1.1ohms

Based on that, it appears to be designed for use with a current limiting 'chopper' type of driver. With a 1.1 ohm phase resistance, it will be trying to pull 10.9A per phase (21.8A total!) through the HAT - which is only rated for 1.2A per phase.

www.pololu.com carries a wide range of stepper drivers with current limiting.

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Joined: Sat Feb 07, 2009 10:11 am

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