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Suggestions for Extra Utility from the TOMAHAWK™ 625 System:
WARNING
ELECTRIC SHOCK CAN KILL.
•Turn off machine at the disconnect switch on the rear of the machine before tightening, cleaning or replacing
consumables.
1.Occasionally an oxide layer may form over the tip of the electrode, creating an insulating barrier between the electrode and nozzle. This will result in the tripping of the TOMAHAWK™ 625's safety circuit. When this happens turn the power off, remove the nozzle and electrode and use the elec- trode to rub against the inside bottom surface of the nozzle. This will help remove any oxide buildup. Replace the nozzle, turn on the power and continue cutting. If the safety circuit continues to trip after cleaning the consumables, then replace them with a new set. Do not continue to try and cut with excessively worn consumables as this can cause damage to the torch head and will degrade cut quality. Do not allow torch cable or body to contact hot surface.
2.To improve consumable life, here are some sug- gestions that may be useful:
•Make sure the air supply to the TOMAHAWK™ 625 is clean and free of oil. Use several extra in line filters if necessary.
•Minimize dross buildup on the nozzle tip by starting the cut from the edge of the plate when possible.
•Pierce cutting should be done only when nec- essary. If piercing, angle torch about 30° from the plane perpendicular to the work piece, transfer the arc, then bring the torch perpendic- ular to the work and begin parallel movement.
•Reduce the number of pilot arc starts without transferring to the work.
•Reduce the pilot arc time before transferring to the work.
•Set air pressure to recommended setting. A higher or lower pressure will cause turbulence in the plasma arc, eroding the orifice of the nozzle tip.
•Use only Lincoln consumable parts. These parts are patented and using any other replace- ment consumables may cause damage to the torch or reduce cut quality.
TOMAHAWK™ 625