Spikes not working - URGENT

[gyroscopeRaptor]

We are working on the robot for the 3rd of July parade and our spikes are not working. We are using one to control a compressor and one to activate a valve. We had the spike that was controlling the compressor working, but it has stopped working oddly. It has an orange light. We have tried using two other spikes for this and the valve spike, but the other two only show an orange light and do not react.

edit1: The lights on the sidecar change.

[BigJ]

A spike showing an orange light means it's not getting signal. Did you change your code?

See also: a search for "spike orange light"
http://www.chiefdelphi.com/forums/sh...orange+lig ht
http://www.chiefdelphi.com/forums/sh...orange+lig ht
http://www.chiefdelphi.com/forums/sh...orange+lig ht
http://www.chiefdelphi.com/forums/sh...orange+ligh t

[Jon Stratis]

What is the Digital Sidecar (DSC) doing? There are two small LEDs next to each of the relay ports that should light up to show which direction it is signaling.

If those aren't turning on, check the following:
- Code
- Power LED's on the DSC - all of them should be lit up
- Try replacing the DSC.


If they are coming on but the Spike isn't responding, try the following:
- Get a multimeter and probe the DSC output. You should be able to see the pins switch voltages with the lights.
- If the pins look good, plug the PWM cable back into it and probe the other end of the cable, where it plugs into the Spike.
- If the cable looks good, check how you're inserting it into the spike. Make sure it goes in straight, push a little bit to make sure it sits fully, and ensure ground is on the correct side (check that it matches ground on the DSC!).

[cgmv123]

Check your fuses.

Since the robot doesn't have to be competition compliant you can replace all your fuses with auto-resetting breakers. The same ones that go into the power distribution board.

Also make sure you have the spikes plugged into the relay portion of the sidecar, not the PWM/Servo/Jaguar/Victor portion.

[Jon Stratis]

Also, if you can make pictures of the important parts available - PDB, DSC, Spike - while in operation (aka LED's on the DSC lighting up when it should be triggered), it could help diagnose. Ensure you have things properly labeled, so we know where the power from the PDB is coming from, which side of the Spike it's going into (double check this, don't assume!), which port each spike is connected to, etc. Something could jump out at us that we wouldn't think to tell you just from a problem description.

[Travis Hoffman]

Originally Posted by gyroscopeRaptor

We are working on the robot for the 3rd of July parade and our spikes are not working. We are using one to control a compressor and one to activate a valve. We had the spike that was controlling the compressor working, but it has stopped working oddly. It has an orange light. We have tried using two other spikes for this and the valve spike, but the other two only show an orange light and do not react.

edit1: The lights on the sidecar change.

Are the PWM cables running between your Spikes and the Relay Outputs on the Digital Sidecar fully seated? Are they oriented correctly? For red/white/black cables, the black wire should correspond to the (-) pin on the Sidecar and the pin labeled "B" on the Spike.

[gyroscopeRaptor]

Thanks to everyone for your advice. It turned out that the PWM cable was not working properly. Who knows how many times it has been pushed in and out over a year and a half? Thanks again.

[akoscielski3]

Originally Posted by gyroscopeRaptor

Thanks to everyone for your advice. It turnd out that the PWM cable was not working properly (who knows how many time time it has been pushed in and out over a year and a half). Thanks agian.

This is exactly why I Hate PWM's. They always break or fall out. we actually started hot glueing ours in this year. but they break all the time, so idk if its worth it...

[CalTran]

Originally Posted by akoscielski3

we actually started hot glueing ours in this year. but they break all the time, so idk if its worth it...

LIKE. We did the exact same thing. They had somewhat less breaking, but turned into an absolute pain for on the fly changing of the victors/jags.

[gyroscopeRaptor]

We epoxied our cables in on our robot this year but the connectors are becoming worn and we had to scavenge cables from 2011 and 2012. They'll be epoxied later tonight. Thanks to everyone, and we will have pictures and video of our EOD robot after the parade.

[rsisk]

How does the hot glue affect the device? Any downside other than having to clean out the glue in order to replace the cable?

[R.C.]

We've had some issues seating the PWM connectors but after they are seated. They are strain relieved and then hot glued. Never touched them since Our FIRST regional.

Rich, its really easy to just take off the hot glue, like 5 minutes worth of work.

-RC

[gyroscopeRaptor]

There may be some residue from the adhesive. We used epoxy, and there is definitely some residue that may have made it harder to reseat and that caused this problem to begin with. That said, the upsides (keeping a compressor working through a match vs. having it unseated and fail) far outweigh any downsides, and 99.9% of situations the cables should be glued or epoxied into their seats on both ends.

[ratdude747]

Another reason I like CAN... If the cable works, it will work virtually forever... Even if somebody messes up and snaps a clip, all that is needed is another clip which can quickly crimped on. Not to mention that you can never get a cable backwards and aside from the left black Jag port of the first Jag (serial CAN), you cannot get the wrong port ever. Now if they only made competition legal CAN relays... that IMHO would be awesome.

[apalrd]

We use clear silicone bathroom caulk (it comes in a nice toothpaste-ish tube) for all PWM and other signal wire connectors, plus black duck tape on the radio. It's fairly sticky, and fairly easy to remove.