" Hot and fast doesn’t mean anything unless you have some evidence to back it up?"I tried everything when I was attempting to cut 10 or 11 gauge sheet. Hot and fast doesn’t mean anything unless you have some evidence to back it up? What size tip and how fast was the travel speed?
11 is 0.132 and 10 is 0.118 and that is quite accurate when I measure my sheets.
I was cutting brand new clean sheets and there is no way I would be removing mill scale before cutting any new sheet.
The torch on a CNC needs to be exactly vertical, not practical to angle it 40° unless you are only making straight cuts. The OP was hand cutting so could apply to his situation. However keeping a torch angled correctly around a circular shape is quite difficult. Those that suggest the method should try it first on a round shape.
Uhm...am I on trial here ?...
It works, I did it, repeatably, and got good parts.
I run Oxy propane, and I run Nitto Koiki hi-speed tips.
I don't recall my settings, But I did follow the chart.
You can change your pre-heat flame a rather large amount for each tip size.
As far as new material, hot rolled has scale for even that thin of material, yes it's very tightly adhering, yes it's smooth.
but it still is scale.