Cutting Parameters




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Thought I would start an idea going with a video and request for help on compiling what people use for their Plasma systems when using Chinese Cut systems.

The output of the Cut40 (in my case) is lower than high end cutters, the rated output is 96 Volts, so I tend to stick with the THC set at 96 or 97 Volts (1.5 Volt dead zone on my THC).

So here are the cut settings I use, set in Sheetcam for various thickness of steel.  Bear in mind that with a max of 40 Amps at 60% duty cycle, 30 Amps should be close to 100% duty cycle, and as I wanted to keep the machine safe I limit the cutting current to a max of 30 Amps.

When I revised my machine to have faster axial speeds, changed to a different style torch, and machining the end of the nozzle to a cone shape etc. have all played a part in improving performance when cutting.

I will continue to strive to improve things over time, but as of march 2018 I am now working with these settings:-

Gauge/thickness
Material
Feed rate mm/min
Pierce delay Secs
Pierce height mm
Cut height mm
Pause end Secs
Amps
THC Volts
Air Pressure PSI
1.6mm Steel
2200
0
1.6
1.0
0
25
96
65
2mm Steel
1650
0.05
1.6
1.0
0
25
96
65
3mm Steel
1100
0.05
1.6
1.0
0
28
96
65









8mm Steel 415 1.0 2
1.2
0.3
30
93
65









1mm Aluminium
5000
0 1.6
1.0
0
25 96
65





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