Hi:
I have a v2.3 Motor Shield attached to a Arduino UNO, Adafruit's NEMA 17 stepper and 12v 2A wall power supply. Everything works OK with the V2 library with the exception that the motor shield doesn't get any power UNLESS the VIN jumper is installed. Neither USB nor 12v works without the jumper and the motor noticably improves torque with 12v. This is the opposite to what I read on the support site.
Is there a short somewhere or just a bad soldering job? I've tested the continuity of all the soldered pins with an Ohm meter and think they're all OK. Since it works, do I care?
Felix
No power on Motor Shield v2 without VIN jumper
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- fjeske
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No power on Motor Shield v2 without VIN jumper
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- adafruit_support_mike
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Re: No power on Motor Shield v2 without VIN jumper
Could you post another photo of the shield from a side-angle please?
The shot above is nice and clear, but doesn't show the shapes of the solder joints at the headers.
The shot above is nice and clear, but doesn't show the shapes of the solder joints at the headers.
- fjeske
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- Joined: Fri Feb 13, 2015 11:53 pm
Re: No power on Motor Shield v2 without VIN jumper
Side view image attached.
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- fjeske
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Re: No power on Motor Shield v2 without VIN jumper
Since you're suspecting the soldering, I touched up each one again so they don't all look like Hershey Kisses and now look more like curved funnels. Didn't change a thing.
- adafruit_support_mike
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Re: No power on Motor Shield v2 without VIN jumper
That's how they should look, and from the photos the joints at Vin and GND needed to be reflowed.
Do you have a separate power supply screwed into the power terminals on the Motor Shield? That's the case where you remove the VIN jumper.
Do you have a separate power supply screwed into the power terminals on the Motor Shield? That's the case where you remove the VIN jumper.
- fjeske
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Re: No power on Motor Shield v2 without VIN jumper
No wires screwed in, just a DC plug as shown in pic #1. So for a plug like this, VIN stay in? Again, fine, it's working with it.
- adafruit_support_mike
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Re: No power on Motor Shield v2 without VIN jumper
Yes, the motors receive power from the DC barrel jack when you have the VIN jumper connected.
- adafruit_support_bill
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Re: No power on Motor Shield v2 without VIN jumper
If you want to supply power directly to the motors, independent of the Arduino power, you need to use the external power terminal as described here: https://learn.adafruit.com/adafruit-mot ... ing-motors
Please be positive and constructive with your questions and comments.