Please Help need quick answer :)

[usbcd36]

The robot controller's digital pins are pulled high internally. In order to make the pressure switch work, you need only connect the ground and signal wires of the PWM cable to the two screws on the pressure switch. Cap the red +5v wire and don't connect it to anything.

Furthermore, the safety valve and pressure switch are two different things. The safety valve should let air out of the system when the pressure exceeds 125 PSI.

[mlucas]

We have a bad pressure switch from a few years back, 2006 I believe, maybe you just got the duds? Be sure you have it connected to the Digital in and that your programming is correct. IF using EasyC, there is a block that all you do is input the digital input port, and the output for the spike...just my 2and a half cents

[DonRotolo]

Originally Posted by jee7s

The inoperable pressure switch could be explained by wiring.

Originally Posted by mcf747

3) I have saw some posts on this already, but my safety valve seems to also be set incorrectly.

Safety Valve, not pressure switch.... I agree that the switch might be set for a little bit off from 120 PSI. The safety valve is passive and really should 'pop' off at 125 PSI or so.

After reading a few posts on the issue, I will have the team test the valve we're using, just for safety's sake. We've never had a problem, but the function of that valve is a critical parameter.

Don

[MrForbes]

we should test ours too....the pressure switch works fine, and we never tried to get the system over 115 psi.

Last year our safety valve was loose "out of the box" and we adjusted it and didn't think much of it. I guess it's rocket surgery, though....so if it's not working right, quickly ask for a replacement from FIRST?