[kmcclary]

You definitely have to have the "primary regulator" after the storage tanks, to limit your "working pressure" to 60 PSIG.

Here's a little hint that we use to save compressor and battery wear and tear while testing:

Given a system similar to the diagram shown in the 2004 Pneumatics Manual where you have a "primary manifold" with the first gauge, sensor, purge valve, etc.:

1) To the FAR side of the purging valve, we've added a standard air hose male barb fitting.
2) We then dialed our shop air down to 120 PSIG.
3) We created a pneumatics "extension cord" with a male and female hose barb quick disconnect fitting attached to a 100' rubber air line hose.
4) Make a few spare "hose stub plugs" using a SMC pushon fitting, a dual female 1/8" NPT fitting, and a 1/8 NPT male plug (this can also be made using only kit parts with a spare 1/8" NPT "T" fitting and TWO plugs).

Now while testing, we simply jack our system into SHOP AIR, and open the purge valve. The hose allows us to be set up ANYWHERE in the shop. The system now fills in reverse via the purge valve. The robot sensor detects the 120 PSIG pressure, and keeps the robot's pump off. Since this is upstream of the primary regulator, NOTHING else changes. As long as your shop air exceeds the pressure switch's turn off value, you now have a full pressure, infinite air supply for testing purposes. This is quickly removed in one second by turning off the valve and popping off the quick connect, and the robot instantly falls back to "auto refill mode".

Given a small compressor and tank in your contest pit ALSO set up for 120 PSI max, this may also be used for a FAST air system "precharge" before your round without draining your robot battery nor requiring the umbilical and control board.

EDIT/
Ah yes, don't forget... To comply with safety rule 5.2.1 rule <R01>, on page 2 of the Robot.PDF, the external compressor in the pit ALSO has to be a FIRST kit style Thomas Industries compressor, ALSO set up to limit system pressures to 120 PSIG.
/EDIT

BTW, We also used this setup on the bench BEFORE the robot was assembled, to COMPLETELY test our pneumatic concepts WITHOUT requiring the RC, Spikes, or even the COMPRESSOR to be included. We simply used one of the above plugs to "stub off" where the compressor resides in the system, and ran the valves with momentary on switches (mounted in a Radio Shack plastic box) and a spare robot battery. This GREATLY speeded up our pneumatics system's development.

- Keith