Victor 888's confuse me!!!

[Lightfoot26]

I have 4 Victor 888s power 4 CIMS on a my drive train. I am getting a high pitched noise and no LED, sometimes when given a PWM signal, sometimes just sitting Idle... any help is GREATLY appreciated!

[Mk.32]

I have 4 Victor 888s power 4 CIMS on a my drive train. I am getting a high pitched noise and no LED, sometimes when given a PWM signal, sometimes just sitting Idle... any help is GREATLY appreciated!

I believe this noise is normal and due to the operating frequency of the victor.

[RufflesRidge]

The 888 LED turn off when provided partial power in either direction. If you are seeing this at neutral, calibrate the device. Victor 888 User Manual (http://content.vexrobotics.com/vexpro/pdf/217-2769-Victor888UserManual_20130118.pdf).

Mk.32 is right on the whine, there is a post around here somewhere by Paul Copioli attributing the noise to the 1KHz switching frequency.

[Chris is me]

I have 4 Victor 888s power 4 CIMS on a my drive train. I am getting a high pitched noise and no LED, sometimes when given a PWM signal, sometimes just sitting Idle... any help is GREATLY appreciated!

This is the expected functionality of the Victor 888. It operates at a higher frequency than the 884 which is within the audible range for humans. Don't worry about it.

[Lightfoot26]

Ok, whew! thanks for the response!