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Unread 15-11-2012, 14:42
Tom Bottiglieri Tom Bottiglieri is offline
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Re: New Talon Speed Controller

Has anyone with a Talon trying to control it with a cRIO/WPILib found a set of PWM signal timings that work well? The source for the Victor notes that signal acceptance between units was a bit off and I was wondering if this can be attributed to the signal generator or consumer side. I have a feeling this can be chalked up to poor calibration on the Victor as the cRIO generating sloppy signals seems less likely.

If no one responds we will run a test across 4 Talons to find timings that work, then post the results here and to WPILib.

From Victor.cpp:
Code:
/*
* Note that the Victor uses the following bounds for PWM values.  These values were determined
 * empirically through experimentation during the 2008 beta testing of the new control system.
 * Testing during the beta period revealed a significant amount of variation between Victors.
 * The values below are chosen to ensure that teams using the default values should be able to
 * get "full power" with the maximum and minimum values.  For better performance, teams may wish
 * to measure these values on their own Victors and set the bounds to the particular values
 * measured for the actual Victors they were be using. 
 *   - 210 = full "forward"
 *   - 138 = the "high end" of the deadband range
 *   - 132 = center of the deadband range (off)
 *   - 126 = the "low end" of the deadband range
 *   - 56 = full "reverse"
 */