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Unread 15-01-2012, 10:24
dyanoshak dyanoshak is offline
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AKA: David Yanoshak
FRC #2158 (ausTIN CANs)
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What you are describing sounds like the Jaguar might be browning out. You didn't mention seeing a voltage fault, but if the supply voltage drops fast enough, the Jaguar can brown out before it can sense and report a voltage fault.

First I would make sure the battery is fully charged. Then I would check the power wiring for each Jag. A loose terminal or a poorly crimped cable can increase the resistance in your power path. A higher resistance means a higher voltage drop on the wire, especially noticeable at higher current levels.

If you have access to an oscilloscope you can monitor the input voltage to the Jag to catch any dips in the supply. I would set it to trigger at a falling edge at about 6 or 7 volts.

Hope this helps!

-David
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David Yanoshak
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