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Thermal light comes on when trigger is pulled on plasma cutter

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Spectrum thunder plasma cutter will not cut steady, keeps stopping and have to pull trigger to cut


Check the contactor contacts for pitting. if severly pitted, replace contactor. If a death grip on the switch makes it work better then a light touch- replace the trigger switch.

Aug 17, 2012 | Miller Spectrum 375 Cutmate Plasma Cutter...

1 Answer

Miller 375 x-treme fires about 30 seconds then stops it doesn't stay running, no trouble lights...


Have you watched to see if the pressure light comes on right before shutdown? If so you may need to add a tank right next to the torch base to address the pressure drop assuming your air source is able to deliver adequate volume to the cutter continuously and you currently have more than 25 feet of hose between cutter and compressor. It might not hurt to check the internal filter as well.

Dec 29, 2011 | Miller Spectrum 375 X Treme Plasma Cutter...

1 Answer

Plasma cutter unit turns on and runs, but when you pull the trigger there is an audible click from the unit and no electricity is getting to the tip. And a warning light on front of unit turns on. Your...


Check the air pressure and make sure it is above the operating pressure the clicking noise is a Relay that turns on the air and the High Voltage to the tip.

Feb 28, 2011 | Welding Tools

1 Answer

Spectrum 2050 plasma cutter . Cutter blows air and stops when trigger is pulled no pilot arc or any cutting when trig is released air flows again and stop after 10 sec new tips was working the day...


Check compressed air pressure is in limits otherwise unit will cut out. Try adjusting the pressure up. also make sure the supply pressure is correct as it may not be your plasma cutter at fault.

Jul 30, 2010 | Miller 903777012 SPECTRUM 2050 PLASMA...

1 Answer

I have a cheap chinese plasmam cutter a giant cut


Internal componet failure, return the machine for repair. Who did you purchase it from?

Jun 06, 2010 | Inverter Welding Tools

1 Answer

Spectrum 2050 plasma cutter will not arc


Possible failure of the trigger switch and or the cable back to the unit. Use an ophmmeter to check that the trigger and cable are good,

Then with the ohmmeter check the continuityu of the cable to the electrodes,

Connectors are always suspect.

These are starting ponts to check.

Mar 04, 2010 | Miller 903777012 SPECTRUM 2050 PLASMA...

1 Answer

Pull the trigger ,air comes out no fire


Ck the ground and the condition of the tip. The more it gets concave the harder it gets to get a arch. Gun angle is also important, hold at right angle to work and don't forget a very good ground.

Nov 03, 2009 | Miller SPECTRUM 375 PLASMA CUTTER 903891...

1 Answer

Not getting a spark when I pull the trigger


Try checking the front Panel and Internal fuses, as well as the thermal overload.

This could happen when you exceed the duty cycle.

eg: 20% Duty Cycle In a period of 10 Minutes, 2 minutes cutting, 8 minutes not.


Best of luck

May 02, 2009 | Welding Tools

1 Answer

Thermal dynamics cutmaster 50 2004 yr.


Check contacts in tip and be sure it is all lubed correctly. If you have good air pressure and flow it should arc after pulling the trigger for about 2-3 seconds.

Sep 27, 2008 | Welding Tools

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