Question about Miller 903777012 SPECTRUM 2050 PLASMA CUTTER

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Miller 2050 that will not spark.

I Have a Miller 2050, it has good air flow...But when you hit the trigger, the air stops and eventhough the ready light is on it will not arc. I have swapped the hose, and gun three times, checked the ground.

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  • freebass24 Mar 15, 2009

    Cut through 1/2" mild beautifully the first time. 8-1" holes, 1-18" hole the a 35" pentagon. Minor angle burn and did not spark for one of the 1" holes, but other than that did good. During the second part about halfway thru, the spark would go out and come back on in mid cut. Then an angle burn in excess of 5 deg. Before it finished the part the tip was fried and stopped burning thru. I am on the 5th yes 5th replacement torch and cant get thru a part without changing all tip components. This is when the tip fires. The problem is the same from 5mm Stainless thru 3/8" stainless and now on to 1/2" mild. Ive had reps galore come out and no results past the initial cut. Just long enough for the rep to get out the door. I recommend avoiding the miller!


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This is relative to 3 causes , contol board , pwm board or torch

Posted on Sep 18, 2009

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I have a Miller Spectrum 625. The problem I am having is that after cutting for three seconds the torch quits cutting. Have had it looked at a Miller repair center. They said they cut with it for over...

I found similar problem with few customers and one issue (should I said the standard issue) is the source of air. You need a steady pressure and flow of air into the machine. Check your air compressor you will need at least 6 cubic feet per minute (360 cubic feet per hour) and a 90 psi of pressure. Since there is no way to check the flow (unless you have an online flow meter at you air pipe) check the pressure at your air tank (reservoir), if the pressure drops below the 70 PSI then that's the problem; your compressor can't stand the flow. Other than that check your ground clamp and make sure it's making a good contact.
Good Luck.

Sep 15, 2011 | Miller SPECTRUM 625 SPECTRUM PLASMA CUTTER...

1 Answer

It runs when u press the trigger theres no fire or air comes out

Is the compressed air pressure in the limits for the unit to work. try turning the pressure up.

Aug 01, 2010 | Miller 903777012 SPECTRUM 2050 PLASMA...

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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

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...

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It runs but when you press tha trigger theres no

go to they have downloads for most everything they make. it sounds like you might have a ground problem or a bad connection in the tip

Jan 24, 2010 | Miller 903777012 SPECTRUM 2050 PLASMA...

1 Answer

Our 2050 plasma cutter will not start,we have electric to it,we had a employee change air supply at the time it was working great then when he changed air it had water in line what can we do to find out...

Clear the lines out let the plasma dry out for about 3 weeks then get more air an blow it out agen and try too use it or if you just bout it take it back if thears a warrenty thares all ways a 90 day warrenty on them and if your lucky a two year an make shure you have proof you bout it

Dec 16, 2009 | Miller SPECTRUM 2050 PLASMA CUTTER NR NEW...

2 Answers

No arc. Power and Air OK

if the main power cable is cut that is your problem,unit uses high frequency.the two leads go to the gun trigger back to unit,no fuse or fuseable links in the gun.

May 13, 2009 | Plasma Cutters

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Miller 3080 plasma ,won't fire

check groun dconnection on workpiece and where connected to machine>> check reset switch.>
There is a screw in fuse on the back make shure you unplug the machine befor removing any fuse or working on any electrical problem.>>OUCH!

Jan 14, 2009 | Miller 903777012 SPECTRUM 2050 PLASMA...

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