Connecting Pneumatics to make it achieve 115 psi

[Yuan Xue Lim]

This is our first year connecting. I found out that the main pressure is always the same as the one in working pressure. Why is this happening?
If possible can someone show me a layout in straight line? Please Thank you

[Daniel_LaFleur]

This is our first year connecting. I found out that the main pressure is always the same as the one in working pressure. Why is this happening?
If possible can someone show me a layout in straight line? Please Thank you

Sounds like your regulator is set too high (I know this sounds simplistic ... but).

Let the pressure rise above 60 PSI and then turn the regulator counter clockwise until the downstream pressure falls to 60PSI.

If that doesnt work, make sure that your regulator is not plumbed backwards (arrow should be on the low pressure side)

And lastly, ensure that your gages are not all on the high pressure side.

[EricH]

Is your main regulator hooked up backwards? The arrow should point towards the low-pressure side, IIRC. If it doesn't, then you wouldn't be able to get more than 60 PSI in the system at all.

[robself705]

Make sure your gauges are on the right side of the regulator, if you attach them to the regulator they will read the line in pressure. There is only one 60psi outlet on the regulator.

[DonRotolo]

OK, you need in the line:
1. Compressor (with safety valve screwed into it)
2. Gauge (for high pressure side)
3. Pneumatic switch (so the cRio can control the compressor)
4. A "tee" connector, one side of which goes to the...
5a. Pressure release valve
...and the other side of the Tee that goes to...
5b. the main (all black) regulator
6. Gauge (for low pressure side)
7. Rest of robot

(Before the regulator, you may want another Tee in there, going to one or more Clippard storage tanks - that helps performance)

[Yuan Xue Lim]

....
Sounds kinda confusing to me but I will try
I would take a picture for everyone to have a reference to see which part is wrong
THANK YOU SO MUCH FOR HELPING ME.

[Al Skierkiewicz]

Yuan,
You will get lot's of help at your first event with this. There is a document outlining the pneumatics system that is available on the First website. Download it and check it over. I bet you find where your robot doesn't match the example. Everything you describe indicates you have the wrong ports on the regulator connected and so the regulator is doing nothing. Easy to fix with a couple of wrenches, and some teflon tape.

[Yuan Xue Lim]

Today I got it reach up to 115 psi on the main pressure. However, after i shuts off the compressor the main pressure drop but not the working pressure( it stays at 60psi). Is it because there is no tank because we shipped our storage tanks?

[Al Skierkiewicz]

Yuan,
The low side pressure can only remain at 60 psi if the high side pressure is greater than 60 psi. If you open the vent valve, both should return to zero. Is that what is happening?
If the high side pressure is falling after you turn off the compressor and nothing else is moving, then you have a leak in the high side. This could be a hose that was not cut flush, a leaking pressure relief valve on the compressor or a fitting not fully screwed into a component.

[Yuan Xue Lim]

Yuan,
The low side pressure can only remain at 60 psi if the high side pressure is greater than 60 psi. If you open the vent valve, both should return to zero. Is that what is happening?
If the high side pressure is falling after you turn off the compressor and nothing else is moving, then you have a leak in the high side. This could be a hose that was not cut flush, a leaking pressure relief valve on the compressor or a fitting not fully screwed into a component.

We are trying to use precharge tanks so i use the vent valve to open and close the feed in valve. Only the high pressure side is leaking and the low pressure side is perfectly fine and doesnt move at all. there is no air leak to be found anywhere on the high pressure side. Is it possible to be other problem?

[Al Skierkiewicz]

So you are using an off board compressor? If after you close the valve, the high side pressure falls, then you have a leak somewhere. It could be on the low pressure side since the regulator will keep supplying 60 psi until the high side falls to 60 psi. Let it sit and watch what happens. You have a leak somewhere. The system components can usually hold pressure for several minutes to an hour or more with no leaks. Use the soapy water technique. Mix some liquid soap into water and wipe on to all the joints. A leak will produce bubbles when you add the soap solution to the joint. This could be a threaded joint or a hose fitting. On rare occasions the vent valve can leak but it is very rare.

[Yuan Xue Lim]

So you are using an off board compressor? If after you close the valve, the high side pressure falls, then you have a leak somewhere. It could be on the low pressure side since the regulator will keep supplying 60 psi until the high side falls to 60 psi. Let it sit and watch what happens. You have a leak somewhere. The system components can usually hold pressure for several minutes to an hour or more with no leaks. Use the soapy water technique. Mix some liquid soap into water and wipe on to all the joints. A leak will produce bubbles when you add the soap solution to the joint. This could be a threaded joint or a hose fitting. On rare occasions the vent valve can leak but it is very rare.

Oic I will try it tomorrow since we already pack up.

[DonRotolo]

To find a leak: Paint the fittings with soapy water and a paintbrush. Bubbles will appear at the leak.