Well I finally got around to cutting my first sign from 16ga CR and it was a struggle.
I have a Crossfire table without THC and a Hobart 27i cutter.
I use Greencut and the fluid level was about a 1/2" from the top of the slats.
My air system is a 60gal compressor with a radiator style condenser, an in line water separator, a quart size desiccant unit and a motogard filter. I’m also in Ontario where its currently cold and the air is pretty dry.
Consumables are in “as new” condition.
I used the 1/16" tool to set the torch height.
I spent quite some time doing test cuts, trying PSI settings from 55 to 110 and IPM from 40 to 100 with amps from 25 to 27 and most wouldn’t cut all the way through for the full test cut.
Oddly, my best result was 40IPM (which I thought was pretty darn slow for 16ga) and 100PSI at 27amps with .06 pierce delay.
The test cut at those settings was very good with little dross however… when I cut the sign, the molten slag, not just dross, was super thick on the back and it took about a 1/2 hour of grinding to clean it up. Couldn’t use a wire cup as there were small details I didn’t want destroyed plus I don’t think it would have been able to remove it anyway as it was molten steel.
Extensive cutting charts for the Hobart 27i really don’t exist for the Crossfire so all I can do is try 30 amp settings others are using with different machines but none of those are working. What am I doing wrong?
I have a pretty substantial water elimination system (detailed in original post).
The 27i should be able to cut 3/8" so 16ga should cut like butter.
Consumables are in great condition.
Drag shield was removed as per instructions so it’s 1/16" from sheet to tip.
Yes I have the XT30R torch.
Thats a gauge by the motogard filter at the end of the copper air line. From there it’s a 3/8 x 10ft flexhose to the plasma cutter.
I test by using a blow gun at the end of the flexhose to see the constant line pressure while holding the trigger on the blow gun open.
Do not use flex hose, cuts down cfm. Does this plasma machine have an internal air regulator, if so, you need to check air pressure on output of that regulator. Tin probably has schematic of your model of machine.