Air Pressure

[millermatic]

Ok so a quick question, the pressure from my compressor is set at 100 psi then goes to a motor guard m-23 then a motor guard desiccant air dryer then the water seperator the machine comes with, then finally into the machine(pp 50). I have to set the pressure on the machine at around 75-80psi so that when the trigger is pressed the operating pressure is around 65psi. Why is there such a pressure drop, and is that normal? I get a lot of slag on the backside of the material being cut. So is the pressure drop effecting the cut quality?

[Rambozo]

Large pressure drops are indicative of flow restrictions in the air lines. I don't see the M-23 listed. If it's smaller than the M-30 it's probably not big enough. Long runs of small hose can also cause that. If the pressure maintains while you are cutting it should be ok, but it's not great. You might want to think about upsizing your air system a little bit. The more restrictions you put in the line, the larger everything needs to be. There is pressure and CFM, pressure can be turned up, but to get more cfm requires larger lines for the same pressure. Does your torch have the little ball tube to measure flow?

Someone else will have to give you tips on the best pressure to use with the PP50 and what you can do to cut down on dross.

[millermatic]

Large pressure drops are indicative of flow restrictions in the air lines. I don't see the M-23 listed. If it's smaller than the M-30 it's probably not big enough. Long runs of small hose can also cause that. If the pressure maintains while you are cutting it should be ok, but it's not great. You might want to think about upsizing your air system a little bit. The more restrictions you put in the line, the larger everything needs to be. There is pressure and CFM, pressure can be turned up, but to get more cfm requires larger lines for the same pressure. Does your torch have the little ball tube to measure flow?

Someone else will have to give you tips on the best pressure to use with the PP50 and what you can do to cut down on dross.

The m-30 is what I'm using, m23 is the filter element inside ha! Well compressor size shouldn't be an issue the capacity and cfm is double of what is required for the machine. The one thing that made since was long hose, I'm using 100ft 1/4" hose to the motor guard then 3/8" from filters to the machine. So should I get a 25'x3/8" hose from the compressor to the filter?

[geezer]

Increaseing the hose dia from 1/4 to .375 (3/8) will give you 2.25 times the air...the rule of thumb is...if you double the dia. of a pipe you get 4 times the flow capacity....1/4 inch line is okay for staplers and nailers but not for impact wrenches etc..

[zoama]

Turn up the amps and move the torch as fast as possible without skipping. The faster you make the cut the cleaner it will be. I believe you need a little over 70 psi while cutting.
Fast and smooth = a clean cut.

[brucer]

The one thing that made since was long hose, I'm using 100ft 1/4" hose to the motor guard then 3/8" from filters to the machine. So should I get a 25'x3/8" hose from the compressor to the filter?

ditch the 1/4" hose, its entirely too small..

Is there anyway you can run a 3/4" hard line, then put a quick connect there, then come from there with the 3/8 hose?

[millermatic]

ditch the 1/4" hose, its entirely too small..

Is there anyway you can run a 3/4" hard line, then put a quick connect there, then come from there with the 3/8 hose?

I looked again to be sure on hose size and it 3/8 not 1/4, so I'm going to remove the in line desiccant filter and only use the m-30. I would hard line the connection but I need the plasma to be Mobil.