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Unread 15-01-2013, 15:12
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Re: Using an Non First Microcontroller with Victor 884 Motor Controller

Quote:
Originally Posted by electroken View Post
Our black Jaguars pretend it doesn't exist. ... We have a 270 ohm resistor in series with the PIC output pin to allow it to survive inadvertent shorts to ground.
How much current can that PIC source thru that 270 ohm resistor?

There's a minimum threshold current required to trip the detection circuitry in the motor controller.

Quote:
The Talon manual states an input frequency of 333 Hz, but it seems quite satisfied with 244 Hz
I believe all three motor controllers will accept periods from 5 ms up to 20 ms. Some will accept periods outside that range. The period does not affect the motor controller's interpretation of the input PWM signal. It is reading the pulse width, not the duty cycle.

Your period of 4 ms (244Hz) is overkill. The fastest period used in the WPILib drivers is 5 ms.