Regulator in razor weld 45

I am new to the cnc world. I have confusion on the air regulator inside my razor weld 45. What psi should it be set at? I also have an in line regulator. My compressor cuts off at 175psi. Can anyone help on this matter?

your compressor is best running at 100 to 130 PSIā€¦but depending on your compressor it may be higher which is fineā€¦just make sure the pressure coming out going to the plasma is minimum 100psiā€¦and make sure the lines are 3/8" minimum and the least amount of hose as possible.

As for the Razorweld settingā€¦some one wil lchirp in on that for you.

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Push the button on the front of your RZ45 and adjust the regulator so that the gauge reads 70 psi while the button is pushed