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Unread 08-04-2010, 12:36
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Re: Black Jaguars on old IFI controls

Quote:
Originally Posted by 1075guy View Post
(I'm not sure why we have to differentiate Jaguars from Victors in the cRIO code, but I know it has something to do with the refresh frequency (200Hz on Vics, 15kHz on Jags?)).
It's actually the input range and "neutral" point of the control pulse width. The IFI control system theoretical neutral value is 1.5 milliseconds, corresponding to a value of 128. Jaguars are designed to that standard. Factory-calibrated Victors tend to have their neutral deadband centered closer to 133, which can cause asymmetric forward/reverse power unless you recalibrate everything or program things to deal with the offset neutral point. The WPI library for the NI control system takes that difference into account.