Air Compressor not turning off.

[Ben Wolsieffer]

Ours is updated but we haven't tested it yet; I'll hook a compressor up it tomorrow and see what happens.

Also, has anyone from FIRST seen this thread, it looks like this might be a major problem.

[dumbuya]

Originally Posted by orangemoore

We haven't decided yet. We were about to get pneumatics working today but we couldn't connect to the robot to test.

Sorry to hear that. What seems to be the issue?

[orangemoore]

Originally Posted by dumbuya

Sorry to hear that. What seems to be the issue?

Were not entirely sure. I haven't had a ton of time to dive into all of the documentation so I have been going off prior knowledge.

We have set up our control system and router correctly (we think). But when we try to connect to the D-link the computer says it is connected to the network but the driver station says it isn't.

I have a feeling if I look at the documentation I may figure out what I'm missing.

[dumbuya]

Originally Posted by orangemoore

Can we get a picture of the setup of the wiring and everything else. We may be able to spot issues.

This is a picture of our test. Hopefully you can make out the controls.
We might try swapping the pcm and see what happens

[dumbuya]

Originally Posted by Jefferson

It's almost certainly not a programming issue. Something may be wrong with the pressure switch. Have you verified it's functioning properly.

We swapped the pressure switch and found the same issue. We will try to
swap the pcm now and see what happens.

I will let you know tomorrow.

[dumbuya]

Originally Posted by orangemoore

Were not entirely sure. I haven't had a ton of time to dive into all of the documentation so I have been going off prior knowledge.

We have set up our control system and router correctly (we think). But when we try to connect to the D-link the computer says it is connected to the network but the driver station says it isn't.

I have a feeling if I look at the documentation I may figure out what I'm missing.

That is always a good start. just make sure you download FRC 2015 update suite before doing anything else. We have a new programmer this year. He is doing a great job. since we have new controls I make sure he goes through the process step by step.

[dradel]

Ours won't even turn on!!

[dumbuya]

Originally Posted by MrBasse

Do you have a gauge to check the pressure? If it is over 120 something is wrong. If you have a leak it might never get to 120. Or if you have a rediculous amount of storage it would take a while to reach full pressure.

Ours ran, filled up, and shut off just as it should

Edit: try another pressure switch or double check the connections on the pressure switch. If wires are shorted it will continue running. Look for loose strands at the PCM connections.

Yes we did and it is over 120 psi. We have one tank onboard.

[dumbuya]

Originally Posted by ToddF

We had this same problem today. We discovered that the newest version of the firmware causes this problem. We reflashed back to the previous version and the pressure shutoff switch now works properly again.

To troubleshoot, completely disconnect the pressure switch from the pneumatics module. This should cause the compressor to shut off. (Fail safe) If it keeps running, it's not the switch, it's the firmware.

It could be the firmware. Is the working firmware the 1.6 version? How would get to a previous version?

[dumbuya]

Originally Posted by dradel

Ours won't even turn on!!

Hang in there. Do not forget to wire up your CAN cables from RoboRio to PCM to PDP.

[Ben Wolsieffer]

I just tested ours (with the 1.62 firmware) and it works fine.

[dumbuya]

Originally Posted by lopsided98

I just tested ours (with the 1.62 firmware) and it works fine.

Okay. I guess this is an issue and needs to be addressed to FIRST.
Something is not quiet right.

[ozrien]

The changes between 1.60 and 1.62 are slight changes in the status LED. There is no compressor related change between the two.

If your having trouble with your PCM, go to the self-test page of the roboRIO web-page configuration.
Jump to "Self Test"...
http://wpilib.screenstepslive.com/s/...ribution-panel

This will tell you...
(1) -if the PCM is enabled (robot is enabled)
(2)- if the pressure-switch is closed (pressure is not full)
(3)- if the compressor-output is on

(3) requires (1) and (2) regardless of which firmware is used.

Does the compressor turn off when the robot is disabled? If not then it sounds like the compressor ground input is shorting to robot ground somewhere outside of the PCM.

When the compressor is on, is (1),(2),(3) reported in the self-test?

Another easy check is to just disconnect the pressure switch. The PCM has two weidmuller connectors that normally go to the pressure-switch. When the pressure-switch signals not-full, it shorts the two leads together (relay). When the pressure-switch signals full, the two leads are open. So if you short the two BLUE PRESSURE SW. connectors on the PCM with a wire, instead of connecting to pressure-switch, PCM will behave as though the pressure-switch reads not-full. Remove the wire and PCM will behave as though pressure-switch reads full.

[G_rupp]

I do not see this issue. What happens if you remove the wires from the PCM? There may be a short at the PCM connector. PM me and I can call to help troubleshoot.

[dumbuya]

Originally Posted by G_rupp

I do not see this issue. What happens if you remove the wires from the PCM? There may be a short at the PCM connector. PM me and I can call to help troubleshoot.

When wires removed the compressor still runs as long as the robot is enabled.
I will PM you as and go from there.