45XP cannot adjust air pressure above 77psi

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Cook
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45XP cannot adjust air pressure above 77psi

Post by Cook »

I have a hypertherm 45xp. Wont let me adjust the air pressure past 77psi . Im not sure if I’m losing pressure from the compressor to the machine. Does anyone know why the machine won’t allow me to go above 77psi ?
weldguy
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Re: Machine will pierce but not cut

Post by weldguy »

Cook wrote: Thu Apr 01, 2021 2:50 pm I have a hypertherm 45xp. Wont let me adjust the air pressure past 77psi . Im not sure if I’m losing pressure from the compressor to the machine. Does anyone know why the machine won’t allow me to go above 77psi ?
What it the air pressure in the compressor tank?

Do you have a gauge at the air inlet if your 45xp so you can compare pressure before it goes into the plasma?
mechanic416
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Re: Machine will pierce but not cut

Post by mechanic416 »

The question is why would you need more then 77 psi you only have a 45 amp plasma cutter. You should only need 70 psi max for 1/2" metal.
adbuch
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Re: Machine will pierce but not cut

Post by adbuch »

Per the Hypertherm manual the 45xp requires a minimum of 188 l/min (400 scfh) @ 5,9 bar (90 psi) at the air/gas inlet to the machine. I run 100 psi at the inlet to both my 45xp and 85 as measured with an inline gauge mounted directly at the inlet and with the air/gas flowing.
David
45xp air supply requirements.jpg
45xp gas supply source.jpg
Last edited by adbuch on Mon Apr 05, 2021 10:47 pm, edited 2 times in total.
adbuch
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Re: Machine will pierce but not cut

Post by adbuch »

Cook wrote: Thu Apr 01, 2021 2:50 pm I have a hypertherm 45xp. Wont let me adjust the air pressure past 77psi . Im not sure if I’m losing pressure from the compressor to the machine. Does anyone know why the machine won’t allow me to go above 77psi ?
Where are you measuring your air pressure?
David
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