for building a machine that is consistent. It is nice when you can leave less that a 32nd of materiall between cuts and make a .120 slot and leave material
It is a balance between amps and travel speed. I run fine cuts a lot and it lets me get away with a lot of stuff. Narrower heat path in the fine cuts. Also just spending time with the table and trying things. Try different settings and see what happens. If it isn't doing what you want it to. Look at the metal and see what it is telling you. To much heat in the cut. Pierce to long. Travel speed to fast / slow. Ramping, Ark feed rate all have something to do with it. Also air, did you spend the money and get the air dryer? Or are you using filters. All factors in cutting. But draw a simple shape of what you are trying for that is small and then try things till you get it
It is all about amps/speed. So for 18 ga i would run 40-45 amps and dial it down to about 35-38. Run the LINE SPEED TEST at 100%. Find the best three lines mainly the backside. They will have little to no dross or the dross will just "pop" off with a little fingernail. Then take those three and make your own line speed test and make each line a difference of 3. You will find three-four lines that are sweet dogs. Then generate a small part and run that the top three speed. Verify that the part comes out clean and nice both front and back. That speeds is now "perfect" for that amperage/thickness of material.
As long as you cut straight lines all the time, the speed test is great. when you start cutting arks and tight objects out the speed test is all gone. But run with what he says and if ya all still have problems PM me.