Re: 4 Known Bad Victor 888s
 

Robby,
If the Victor has an illuminated LED then the PD is working. Everything sounds like the PWM cable is not full inserted. These can be tricky as it is possible for the pins to miss the female connector inside the block. Once fully inserted, less than 1/8 inch of the PWM block is visible above the shoulder of the Victor housing. It is possible to fully insert the connector and still miss the female connector.

Re: 4 Known Bad Victor 888s
 

We have never had issues with Victors until this year. We have one that may or may not be broken (turned on the robot one day and only one side of the drivetrain moved). We've yet to fully look into it, but at first glance it does appear to be broken. It was one from last year though, not right out of the box

Re: 4 Known Bad Victor 888s
 

The fan is not working on one of our 888s.

Re: 4 Known Bad Victor 888s
 

Taylor,
Nine times out of ten, the fan wire was crimped before the wire was stripped.

Re: 4 Known Bad Victor 888s
 

I'd check the following:

1) Whether PWM connector is properly inserted into the Victor. It is easy to misalign. It often appears to be plugged in properly, but the pins don't actually go into the connector inside the Victor housing, but slide off the side instead. Remove the PWM connector and see if the pins are bent all to one side slightly. If so, the connector was plugged in incorrectly. Straighten the pins, and try again. Wiggle the connector slightly as you insert it. The connector should take very little force to fully seat. If you have to push hard, you've missed the connector.

2) Check the ribbon cable from the Digital Sidecar to the cRIO module. If some of the wires were not fully crimped in the connector, some of your DSC pins won't work. This is likely the case if some of your PWM ports don't seem to be working. You can verify this quickly by connecting one of your blinking Victors to a PWM port that was successfully driving a non-blinking Victor.

Re: 4 Known Bad Victor 888s
 

Thanks for all the replies everyone.

Our team decided to attribute the cause to internal damage. Once we swapped out the Victors with our spares, it ran fine. (and if you're curious, has been posted here) We are still unsure as to what might have caused the damage.

After we get to test the supposed "bad" Victors a little more, we are going to call VEX again and see what we can do about shipping these back and/or getting new ones.

Re: 4 Known Bad Victor 888s
 

Did you ever run the simple diode test on the Vic's PWM input?

Re: 4 Known Bad Victor 888s
 

On the Victor's PWM input slot? We checked the output, and although the Victor was receiving input, the output remained at 0 volts. Which could have been a loose PWM cable, but does not explain how swapping them out works.

Re: 4 Known Bad Victor 888s
 

Yes. As explained earlier here.


How do you know the Victor was receiving input if you didn't test it?

An improperly seated PWM cable would explain it (on a Vic that's a little more finicky about how the input cable is plugged in).

Re: 4 Known Bad Victor 888s
 

The PWM cable could have been loose, but I don't think this is the case.

We also had done a bench build while we were swapping them out, hooking each Victor up to a motor we knew worked before placing it back on the robot. I believe it's safe to say four of the twelve we have just don't work. We greatly appreciate your input, though.

Re: 4 Known Bad Victor 888s
 

If you call customer service, they will walk you through troubleshooting and replace if the Victors are bad out of the box.

I can tell you though if the LED is blinking orange, then the Victor thinks it is not getting any input. If the light was solid or off, then I may be inclined to think the Victor is bad. However, the Victor behaved as I would expect it to when the light is blinking orange. The problem could still be with the Victor, but at the input side.

The blinking orange means the Victor is not getting a valid PWM signal.

Re: 4 Known Bad Victor 888s
 

We've been having issues with out Victors as well. After some research we found out that if you shave down the sides of the shroud of the PWM cables they will fit into the holes of the Victors. Our pins were not connecting to the inputs in the victor because the shroud of the cables are too big. Vex says that if you are having issues with the Victors than to shave down the sides of your PWM cables. Hope this helps, good luck!