Question about Miller Spectrum 375 Cutmate Plasma Cutter 903891
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Posted on Jan 02, 2017
If you have a bad air supply then the moisture in the air will cause the torch to cut off and the cut quality depends also on air supply,speed,metal thickness and condition of your consumables,meaning your electrode and other related parts in the torch tip.Hope this helps
Posted on Jan 06, 2009
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Do you prefer a hobart? This is one reason not to buy one. They are hard to get service for also.I've owned and used extensively several plasma cutters and the best in my opinion is the thermal dynamic 3/8
Its easy on consumables and can sliver stainless to 1/32 . Hobarts are home depot grade. that is probably the best place to find one. good luck
Posted on Jun 24, 2009
make sure that there is air to the plasma and set at the proper psi. Make sure that the contact tip and nozzle is in the cutting head correct.
Posted on Dec 18, 2009
On the main circuit board for the power supply, there is usually a thermal fuse installed, its a sealed unit and is not servicible, look for a black epoxied case,approx 3/8x3/4 long, with 2 leads coming out of it. Inside is a set of bi-metal contact points which serves as an over voltage/over current protection. These contacts deform/corode over time and it sounds like there not contacting properly. As soon as you try to load the machine, the current passing through this high resistance heats these contacts up, and shuts off power to the unit. I am not familiar with the guts of a hypertherm, but have extensive experiance repairing inverter based plasma cutting equipment, and i have encountered this before. I assume hypertherm must have some equivelent to this thermal switch inside the power supply.....Good luck..
Posted on Jan 18, 2010
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