We have two problems on our robot:
A Falcon motor with MaxPlanetary gearbox is attached to a winch. When energized the motor rotates the winch spool a half revolution or so then stops - regardless of direction. Should run until controller is released or a hard or soft limit is hit.
Another Falcon does not appear on the CAN bus. The can bus is wired with a bus wire from power distribution hub to the roborio and the drive train motors are tapped into the bus. Another (the one described above) is attached to a spur line from the CAN bus and is recognized by the RoboRIO. The other Falcon is connected further downstream on the spur CAN line and is not showing on the bus. I suspect that the SparkMAX further downstream on the same CAN spur line (connecting a NEO550 with an Ultraplanetary gearbox) are not on the CAN bus either. I heard that terminating the CAN bus spur with a 120 ohm resistor might solve this. What else should we look for in our troubleshooting?
Thanks for any advice you or your electronics expert(s) might offer is very welcome.
Our competition starts Friday and we are a rookie +1 team (with mostly rookie team members after sitting out during Covid…)