Electrical issues

Hello we are Team 884 and we are having issues with our mototr controllers. We are asking if there is an efficient way to tell if it is a motor issue or a motor controller issue.

Use a multimeter to measure the voltage coming from the speed controller, also what motor controllers and what color are the lights when the you run them

To start with what motor and controller are you using wnd what is the metod of communications between the rio and the controller?

Might also be helpful to know what the issue is. Are thy not working altogether? Are they cutting in and out? Are they laggy? The more information you can provide, the better. Pictures and/or video can’t hurt either.

Hello, I am a member of Team 884 as well and I just wanted to add some additional information in case you needed it. When we use two talons(or sparks), the robot does not function properly however when we replace one with a jaguar, the robot works. We would like to thank you for your time and ask for any input, suggestions, or help. Thanks again!

That’s weird. If it works with a Jag then the problem isn’t the motors. It could either be in the motor controllers or in the roboRIO. When you say Talon do you mean Talon SRX or Talon SR? What do the lights on the Jag, Talons, and Sparks look like? Can you use a voltmeter to check the output voltage on the motor controllers? I’m specifically interested in whether the output voltage on the other motor controller changes when the Jag is substituted. It’s possible that only one motor is working but since they are mechanically connected it looks like they are both working. Possibly try switching PWM outputs on the roboRIO. If that doesn’t work, it’s probably either a code problem or your motor controllers are broken.

Look at the status lights on the non-working motor controllers:

Spark out of the box:

  • flashing blue = no PWM signal is detected (robot disabled, PWM cable in backwards or missing, no reference in code)
  • solid blue = PWM received and robot is enabled
  • flashing red or green power being sent to the motors.

Talon:

  • flashing yellow= no PWM signal is detected (robot disabled, PWM cable in backwards or missing, no reference in code)
  • solid yellow= PWM received and robot is enabled
  • flashing red or green power being sent to the motors.

This is correct. Another note is that if your SPARK is in coast mode, the same thing in blue will be yellow.

  • flashing yellow = no signal/ robot disabled
    -solid yellow = signal / robot enabled.

If you need any help with your SPARKs don’t hesitate to reach out to us [email protected]