hypertherm miss fire update

[abmagrum]

Hi

Here is the update

This is what I did, Loaded 6" butterfly . Hit run . Then ran over to air gauge on back of hypertherm.

Pressure started 120 dropped to 90 and 80 on the cuts.(went back up between cut lines)pressure ended at 100 psi compressor didn't kick on YET.

Then put in 9 inch perch . Hit run, Ran over to gauge. IT started at 100 then ran 80- 75 on the lines.

No miss fires. The cuts that are cut are Awesome. But a new problem

Some lines not cutting all the way through. I am thinking not enough air to push out slag. Is this correct?

Here is what I have set up a Devibiss pro 4000 60 gal. 5hp set at 140 psi. This has a 1/2 in black iron pipe. Going 30 feet across the room . 50 if you count up and down. This goes into a 20 or 30 gallon compressor tank. Which I hooked up a heavy duty pancake compressor. So I have 2 compressors running . then I have 3/8 line going to the airdry filter and then the hypertherm. So the pressure at the tank is like 130 by time it gets to the hypertherm its 110.

Should that be enough pressure? I think something might be restricted in the filter.

Oh Jim the cut height is a nickel + 2 pieces of paper if that helps

Hope this helps. I think im almost there.

Thanks everyone
Al
what do I do now ? more air ? torch height adjustment ? travel speed?

[jimcolt]

The cut quality issue....as well what you are calling a misfire issue.....are most likely caused by the low inlet air pressure you saw on the gauge at the plasma system. You said you saw the pressure at the inlet drop to as low as 75 psi while cutting...this is enough pressure drop to severley affect cut quality and consumable life....and is precariously close to shutting down the plasma (could this be your "misfire"?) by internal low pressure safety switch.

The inlet pressure to the plasma needs to be between 90 and 135 psi when the torch is flowing air. Always. Lower will cause the pressure switch to drop out, it will cause a weak cut (not cutting all the way through) and it will cause short consumable parts life. Higher can cause internal air system component failure.

If your pressure ever drops below 90 psi at the rear panel of the plasma while flowing (torch cutting or blowing air)...then expect problems. The pressure at the rear of the plasma without the air flowing means nothing.

If it drops below 90 psi at the plasma (while flowing) but you have more at the compressor....then that means:

-There are restrictions between the Compressor and the Plasma.
-Plumbing, hoses to long or too small in diameter.
-filter is plugged or too restrictive.....this will not allow adequate flow, which causes pressure to drop under flow conditions.

Jim Colt Hypertherm

Hi

Here is the update

This is what I did, Loaded 6" butterfly . Hit run . Then ran over to air gauge on back of hypertherm.

Pressure started 120 dropped to 90 and 80 on the cuts.(went back up between cut lines)pressure ended at 100 psi compressor didn't kick on YET.

Then put in 9 inch perch . Hit run, Ran over to gauge. IT started at 100 then ran 80- 75 on the lines.

No miss fires. The cuts that are cut are Awesome. But a new problem

Some lines not cutting all the way through. I am thinking not enough air to push out slag. Is this correct?

Here is what I have set up a Devibiss pro 4000 60 gal. 5hp set at 140 psi. This has a 1/2 in black iron pipe. Going 30 feet across the room . 50 if you count up and down. This goes into a 20 or 30 gallon compressor tank. Which I hooked up a heavy duty pancake compressor. So I have 2 compressors running . then I have 3/8 line going to the airdry filter and then the hypertherm. So the pressure at the tank is like 130 by time it gets to the hypertherm its 110.

Should that be enough pressure? I think something might be restricted in the filter.

Oh Jim the cut height is a nickel + 2 pieces of paper if that helps

Hope this helps. I think im almost there.

Thanks everyone
Al
what do I do now ? more air ? torch height adjustment ? travel speed?

[abmagrum]

Hi, Jim

So if I can get air pressure to 90. to run at 90 psi it should solve all the problems ?

I think the only problem left is the tail end of the project not cutting through. just last couple inches.

I am going to bypass the airfilter and see how it cuts. (stays at 90) then if it works I will work on the air filter

Jim there is no more miss fires .Only thing left is the tail end of cut holding on BY A HAIR. So I think we got it fixed.

Thank you for taking the time to help
Al

[abmagrum]

Hi, Jim

Got it working. It was the air pressure .

Thank you very much !!! for helping and putting up with me.

Now I love my Hypertherm and can bragg about it. MAN DOES IT CUT NICE. Just cut out sign torches humbing bird welcome.

Thanks , Jim

Al