Quit guessing, try a Thrifty Throttle!
is a toolbox staple when your robot is acting up. Connect this to a PWM-based motor controller (sorry, CAN fans) like the
, press the button, and you'll be able to send known-good PWM signals to test mechanisms and motor controllers. If it works, you can focus on issues upstream. If it doesn't work, then you know to start focusing on the motor controller, the
itself, the motor, or the mechanism the motor is powering.
For $30 (and a 9V battery)
, you get a powerful troubleshooting tool that will pay for itself the first time it gets your team's build meeting back on track.