Shield Problems!

Drive a 4-wire bipolar stepper motor or a pair of DC motors from your Arduino. [Product page]
ShadowGaming
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Joined: Sat Feb 08, 2014 7:06 am

Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 3:28 am

Hey Guys!

I just got a H-Bridge Shield but i'm having a bit of frustrating challenge... :cry: :cry: :cry:

I have port A of the shield wired to a 12v dc geared motor and the "40v max" input wired to two 6 volt batteries in series.

Problem is, when I upload the example sketch, the motor just turns in one direction, nothing coming out of the serial and I don't even have to plug the Arduino into power. it just comes from the big 6 volt batteries...

Anyone know why? :|

andrew
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Re: Shield Problems!

Post by andrew » Sat Mar 14, 2015 4:45 am

Could you please check the voltage coming from your twin battery setup?
If it's greater than 12V then remove the "Bridge VIN To Motor Power" jumper and power the Eleven via USB or another source.
Also, check the specs for the current, you may need to adjust the current switch for the motor.
Let us know how you get on.

ShadowGaming
Posts: 12
Joined: Sat Feb 08, 2014 7:06 am

Re: Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 4:48 am

nothing is connected to bridge vin to motor power though...

ShadowGaming
Posts: 12
Joined: Sat Feb 08, 2014 7:06 am

Re: Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 4:49 am

ShadowGaming wrote:nothing is connected to bridge vin to motor power though...
also, the current drawn by the motor is 390mA with load, twin batter v output is 11.5v

andrew
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Re: Shield Problems!

Post by andrew » Sat Mar 14, 2015 5:25 am

OK disconnect the power to both the shield and Eleven, attach a jumper to the "Bridge VIN To Motor Power", then reconnect the shield power.

ShadowGaming
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Re: Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 5:31 am

so connect the two pins on the bridge vin to motor power???

andrew
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Re: Shield Problems!

Post by andrew » Sat Mar 14, 2015 5:59 am

ShadowGaming wrote:so connect the two pins on the bridge vin to motor power???
Yes, connect them to each other. You can use one of the little black jumpers included with the shield.

ShadowGaming
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Joined: Sat Feb 08, 2014 7:06 am

Re: Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 10:09 am

did that, now it just turns then stops after a few seconds :x

ShadowGaming
Posts: 12
Joined: Sat Feb 08, 2014 7:06 am

Re: Shield Problems!

Post by ShadowGaming » Sat Mar 14, 2015 7:59 pm

Hmmmmm. now it's just turning in one direction, changing speeds sponteneously :?

andrew
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Re: Shield Problems!

Post by andrew » Sat Mar 14, 2015 9:17 pm

If you replace the motor wires wtih a multimeter set on DC V, can you see a change in polarity when the forward and reverse commands are used?

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