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Cutmaster 50 does not shoot air when presss the trigger

If I flip the switch to purge, the air flows freely but when I switch to cut, there is no air. there is not apparent problem with the hose, I have been very caerful not to hurt the hose and I bought the machine new in 03. it has had very limited use and was working fine one minute and the next... nothing. I had never messed with the air pressure controls until just a little earlier that day, I turned the pressure up about 5 pounds because I was cutting some thicker material, (seemed logical) It worked fine but directly after I turned the pressure back down to 70 lbs and tried to make a cut, the machine cut for a split second and then no air... please help...I depend on this machine!

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Check the air soleinoid.

Posted on Jul 05, 2009

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1 Answer

Cutmaster sl101 not working


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.

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1 Answer

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Hi; Check the following troubleshoot and see if you can ID the problem:
Problem: Gas flows continuously when power is turned on, AC indicator flashes 1. Torch switch is activated (closed) before user turns power on. a. Release torch switch. 2. Faulty torch switch a. Check torch switch for continuity. Replace if necessary.
Problem: Gas flows continuously; Torch will not pilot when torch switch is activated; AC indicator ON 1. System is in SET mode a. Change to RUN / Rapid Auto Restart / SET switch to RUN (up).
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1 Answer

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Hi:

Sound like you have a faulty start cartridge, probably you used the torch handle to bang a metal part to make it fall. This is a common problem when using the gun as a hammer. Just replace the start cartridge. Before changing it; check the cartridge's lower end, this must move freely up and down.. If you did replace the cartridge already then probably your output power pc board it's damaged.

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1 Answer

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Is your air compressor able to keep up with the continuous regulated air flow?
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Also if your movements are to fast and or material to thick machine will behave that way..

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1 Answer

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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.

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