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Unread 12-02-2013, 13:56
petet4 petet4 is offline
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AKA: Pete Thomas
FRC #0706 (Cyberhawks)
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Join Date: Jan 2009
Rookie Year: 2008
Location: Waukesha, WI.
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Re: Issues with the Talons

I will confirm PWM update rate this evening with a scope between Victor and Talon class.

Here are the spec's for the Talon

Input voltage 6-28 VDC
Continuous current 60 A
Peak current 100 A
Input PWM signal 1-2 ms @ 333 Hz
Input resolution 10-bit (1024 steps)
Output resolution 10-bit (1024 steps)
Output switching frequency 15 kHz

I read this as 333Hz is the update rate as it does not ready provide a lower range for the update. Then kind of assumed it was the update rate.

Now a little puzzled as why changing to the Talon class fixed our issue. Looking at the C++ source code for both the Victor & Talon I expected to see something with the update rate but did not. The only thing were slight changes in the PWM bounds for full forward, reverse and dead band ranges.

Boy, just when you think you have answer you have to go back and dig a little deeper to fully understand.

-pete