I am currently running a mid to high mix / mid to high volume fab shop, and recently we have been making product that all needs to be powder coated (i.e. clean cut). Our bulk N2 usage has gone through the roof. I do not have a dedicated shop air system in place, but I've had great success with...
Try swapping out the flowmeter from the Cu circuit with the one from the Alu circuit, and see if you get the same error.
Als if you've done a water change recently, and cleaned the cathode cups, you may have a small piece of debris jamming the impeller on the flowmeter
You can expect to lose about 1-2% per mirror if you do the pucktest at the head. Also check your optics for purpling, or haze. Next, pop off some of the water fittings at the heat exchangers in the resonator, see any "putty-like" substances? Check your quartz tubes for aluminum oxide deposits.
you could also try using hi-pressure shop air, but it had better be clean and dry! Shop air cut parts can be both welded and painted without secondary operations
Have you tried using shop air as an assist gas. I use a 120psi compressor, run through a booster and a dryer, to achieve 500psi. One mm CRS cuts @ 600 IPM With minmal browning or orange color. The thinner the material is you cant even see it. You can still do this with as little as 80 psi...
SABJR:
Are you sure that that is "laser vinyl"? All the laser vinyl I use has zero adverse effects on my cut quality or speeds and feeds. While etching is a solution, it is expensive to run the program 2 times. Do a little more research with your material supplier, you would be...
Scotty,
I run a L3030s 4K, and I use the following (copy and paste into your PLT4000.LST):
DA,'19917','TC8',4000,'ST-100',25.4,7.5,'2.300000',4,0.0,0.0,2.0
* ,2.032,2.032,0.5,100.0,1,1,0.508,4000,10000,0.6604
* ,1.016,1.0,3000,100,0.254,5.08,0.6,0.508,500,15
*...