Chief Delphi - Victor 888 "y" cable issues

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- - Victor 888 "y" cable issues (http://www.chiefdelphi.com/forums/showthread.php?t=113838)

RufflesRidge

19-02-2013 07:53

Re: Victor 888 "y" cable issues

Quote:

Originally Posted by theawesome1730 (Post 1236106)

I do not however understand how a victor running 1% output can put out 12 volts.

Was that measured unloaded?

I agree that the cause of this is almost certainly the added load of a second Victor affecting the rise and fall times of the PWM signal enough to land just outside the 888s deadband. Try calibrating the Victors while they are attached to the Y cable and I expect the problem will go away.

Ether

19-02-2013 09:42

Re: Victor 888 "y" cable issues

Quote:

Originally Posted by RufflesRidge (Post 1236170)

Was that measured unloaded?

Here's a graph of an 884's output voltage vs input pulse width, with the output essentially unloaded (1500 ohms).

Racer26

19-02-2013 10:01

Re: Victor 888 "y" cable issues

I found when working with 4343 that we had to calibrate our Victor 888's on the Y cables to get them to behave nicely. Took a few tries to get "off" to be "off" and not "on just a hair"

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