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Unread 28-02-2012, 12:47
sparks-1784 sparks-1784 is offline
Lance Stronk
FRC #1784 (Litchbots)
Team Role: Engineer
 
Join Date: Feb 2006
Rookie Year: 2005
Location: Litchfield, CT
Posts: 46
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Re: Unable to control motor on cRIO test setup

The issue was a number of things, all of which added to the confusion in debugging the problem:

1. The appropriate software updates were not performed.
2. A 'brassboard' was wired and a Jaguar motor controller was wired up incorrectly (motor to Vin and 12vdc to jaguar motor outputs). When power was applied to brassboard, motor started and ran full tilt. Jaguar subsequently burned up. New Jaguar replaced burned up part - same wiring as first Jaguar.
3. Mentor enters picture, power applied to brassboard, motor runs continuously. Mentor kills power, observes jaguar wired incorrectly and wires jaguar correctly (at this point the part is compromised but there is no indication) and reapplies power.
4. Several iterations of attempts properly configure software - software updates for cRIO image, drivers station, etc. Still no motor control. Instructions are being read and applied during this time.
5. All other possibilities exhausted. Mentor remembers Jaguar incorrect wiring and decides to replace Jaguar. Motor control is confirmed.
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