On Wed, 26 Nov 2008 11:28:59 -0500, Bob Engelhardt
wrote:

I'm getting a "Gas pressure" fault on my plasma cutter (Hypertherm
Powermax 380). The PC monitors the gas (air in my case) pressure &
inhibits power to the torch if it falls below 40 psi.

I've:
- checked the pressure on the supply line - it never drops below 80 psi
- changed the filter on the PC

The PC has a built-in air regulator & gauge. It's set to 60 psi, as it
it is supposed to be. The pressure doesn't drop when the torch trigger
is pulled & gas flows.

If I set the PC's regulator to 80 psi it works. Sometimes. The owners
manual says to check the torch lead for pinched hose or obstructions.
This suggests that there is a pressure sensor in the torch & upping the
regulator satisfies it. But the parts diagram doesn't show one.

Any ideas? Before I start tearing it apart, which I'd really rather not do.

Thanks,
Bob


There WILL be a safety pressure sensor somewhere i n there. Should be
pretty easy to find. Simply follow the air line in..and look for the
thingy with the wires on it.

Gunner


"They couldn't hit an elephant at this dist..."
Maj. Gen. John Sedgewick, killed by a sniper in 1864 at the battle of Spotsylvania