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Thermadyne S.A. Welding Information 
Bulletin #16

Problem Shooting and Maintenance

  1. The operating voltages for Plasma Arc Cutting can reach 400 volt D.C. and most systems incorporate safety features that prevent the operator from coming into contact with the high voltage. Before using the system the operator must ensure that the torch cable is not damaged or punctured and that the electrode, tip and shield cup is fitted correctly, securely and in good condition. All access panels must be closed at all times when the power is connected.
     
  2. It is recommended that periodic cleaning using dry compressed air, of the interior of the power source is done to ensure that metal containing dust does not damage the electronic components. When this is done the power to cutter must be disconnected first for you own safety.
     
  3. Fumes and gases produced by the Plasma Arc Cutting can be hazardous to health and must be avoided. Use the necessary respiratory protection masks or respirators when cutting in unventilated or confined areas.
     
  4. Sparks from the Plasma Arc Cutting can be a fire hazard and all combustible material and solvents should be kept away from the cutting area.
     
  5. The Plasma Arc emits intense, visible, infrared and ultraviolet radiation which can be harmful to the eyes and skin. The same eye and skin protection normally used for GTA (T.I.G.) welding at the equivalent current range should be used.
     
  6. Water vapor and oil introduced into the highly concentrated constricted arc can damaged the electrode, tip and shield cup and depending on the severity of the water or oil “explosion” within the arc, damage to the entire torch head is possible. It is recommended that the water/oil trap fitted to the air supply system of the cutting machine is cleaned at regular intervals. Should water/oil still persist, it is recommended that a second water/oil trap be installed at the compressor outlet.
     
  7. Our Plasma torches come complete with an AIR FLOW INDICATOR that assists with adjusting the correct air pressure required per thickness of cut. Insert the indicator over the cutting tip end and press the trigger. The air pressure will be indicated by the ball movement within the tube. The correct air pressure per thickness of cut is essential in obtaining precision type cutting.

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