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Unread 15-02-2016, 10:22
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Greg Needel Greg Needel is offline
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FRC #2848 (All-sparks)
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Re: spark controller dropping voltage in reverse

Quote:
Originally Posted by fmercier View Post
Thanks for all the comments.
We have reset the Spark. LED still has intermittent blinking in reverse. The actual motor speed is slow, matching the low output signal. Per our program, we are sending a value "1" for forward and "-1" for reverse. The result is the same with a second Spark. We have also tried a jaguar, and the drop off is less, but there is still a clear difference between forward and reverse. ???
If it is doing the same thing on a different SPARK, I am not suspecting that there might be something else wrong with your setup.

Here are a few things to try.

* Check that your battery is fully charged
* Change your PWM cable
* Change the port your PWM cable is plugged into on the roboRIO
* Ensure that your power wires are secured to the SPARK and your Power distribution board.

Please let me know if you need additional help, send me a PM or email me at Contact [at] REVrobotics [dot] com
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Greg Needel│www.robogreg.com
Co-founder REV Robotics LLC www.REVrobotics.com
2014 FRC World Champions with 254, 469, & 74