Problem with drivetrain and we can't figure it out.

[Mark McLeod]

Test it, then look in the driving log to see what your battery voltage has been doing.

The Driver Station Log File is a really useful tool you need to get acquainted with.

On the Driver Station on the right side is the message window.
At the top left of the message window is a rosette icon.
Left-click on the icon and choose "View Log File"
That brings up the Driver Station Log File Viewer.

In the left window of the log file viewer you'll see a list of past robot runs.
Find an entry with the current date/time that's a reasonable number of seconds long and click on it.

The graphs for that robot run will appear.
The yellow plot line is your robot battery voltage.
Anything below 7v threatens a brown out.

You can also choose the Event List tab at the top of the graph window to see a list of warnings and errors that occurred during that robot run.