20 Most Recent RTO Esab Plasma Electrode 0558001969 PKG/2 Questions & Answers

check the main lead to the torch,if there is a cut or any hole in the rubber coating it will show fault,the unit uses high frequencey so if the lead has a cut it wont fire up.

There is a resettable breaker inside the machine that cuts off power to the plasmahead when tripped. Check that and make sure the head is secore to cable and cable is secure to machine.If it still fails to function check the coil in the contactor to make sure it has not burned out. Also check the pressure switch to make sure it closes contacts to make the circuit when the unit is pressurized If switch is not functional the head will not operate. Also check gas solenoid or solenoids to make sure they do not have burned out coils as well. An Ohmmeter should show about 2000 ohms give or take some. The main contactor winding also. It may be the main contactor needs replacement- a loose power connection can lead to burned contacts. So if you hear the machine click when you press the trigger, but no power to head, and all the other items mentioned still leaves you with no power at the head, that main contactor is the likely culprit.If IGBT's had failed- they would blow apart part of their plastic case.So a quick visual is usually adequate for those.

Louis D Biasi You resurrected a 12 year old unanswered question which will now stick on the Homepage, 'Unsolved' despite being answered. It is always better to make a squeaky fresh, clean question of your own. The area where you posted is the 'Additional Information' information are so perhaps the OP can take his apart for you, but where the trigger connects should be pretty straight forward. Electrical schematics are available. Here are some manuals https://www.manualslib.com/brand/mishto/welding-system.html But is appears to also go by the name of 'Rossi'. Better manual here https://www.manualslib.com/products/Rossi-Welders-Weld-Mig220bz-3941072.html ..

I have the same problem with the Mighty Mig...Did you find these resistor values?

Question edited for clarity. Normally on the back or hidden inside https://www.google.com/search?q=iron+force+95+welder+fuse+location Seems to be an unknown make. Try the link where you live https://www.google.com/search?q=iron+force+95+welder+manual ..

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need a model number

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https://electronics.stackexchange.com/questions/309954/solder-paste-vs-solder-flux

Question edited for clarity. Some ideas in the link. https://www.google.com/search?q=Miller+250+welder%2C+brushes+unevenly+worn ..

To check if there is a signal from the switch on the gun, depress the switch and the wire should start to move out. If it does, the main board has a fault, if it doesn't, it may be a faulty switch.

Question edited for clarity and order. You can't. It is 400 volts - 3 Phase.

Cutmaster 25 Manual Plasma System

https://www.westermans.com > victor-thermal-dynamics... 25mm genuine cut, 30mm maximum cut, 38mm severance; Input: 3 ph. 400V 50/60Hz 20A; Output: 80A @ 40% DC; Front panel LED's indicate status conditions for ... https://www.google.com/search?q=Plasma+cutter+thermal+dynamics+25 ..