Well, i'm getting baffled again, the new torch arrived this morning and results seem to be better but something is still wrong.

In this picture...


The long cut is made at 20A @ 4000mm/min, its a nice fine cut about 0.5mm kerf with zero dross front and back.

After that success I thought I'd load up a little test file i've been messing around with and try that after editing the sheetcam settings to suit the new parameters...


Now, this was the second run as the first one at 4000mm/min was worse so i dropped to 3750mm/min but all i got was a pile of dross and partial cuts.

Both tests were pierced at 4mm (mfg recommendation) and cut at 1.75mm (mfg says 1.5 - 2.0mm)

Now this tells me that something is badly wrong but my lack of experience does not tell me what.

Any pointers here???

Also, I have set a pierce delay of 0.1 sec in sheetcam but mach3 seems to stay for at least a second or so.???