In All Cases:

•Do not pause when cutting or gouging the metal. This is not necessary and causes opera- tional difficulty. Pausing at the edge of the work- piece causes poor consumable life and erratic operation.

•Always position the torch in the best way to keep dross and hot air from burning back into it.

•Do not carry a long arc. This may trip the safety or fault circuits and wears consumables rapidly.

•Do not drag the nozzle above the mid-range setting. Always hold a standoff of 1/8” above mid-range.

•Use a Drag Cup where possible but only when the current is in the blue or red ranges. Drag the nozzle in the yellow range. The use of the Drag Cup at low currents (in the yellow range) may cause problems. Proper use of the Drag Cup is the best way to get maximum nozzle and consumable life.

•Use the proper machine setting. Running the system at maximum output will not produce the best cutting performance in most situations.

•Use the proper cutting or gouging procedures referred to in procedures guideline.

•Use the nozzle with the largest orifice size that gives an acceptable cut. This will improve parts life. Never use the .035” (0.8mm) nozzle at out- puts above the yellow range.

Suggestions for Extra Utility from the PRO-CUT System:

•In some cases where moderate or thin sections are being cut, higher air pressure may give bet- ter consumable life. At pressures about 80 psi (551 kPa), the pilot arc may sputter. This may be an annoyance but it will not damage the torch or power source. 60 psi (413 kPa) mini- mum while air is flowing is the recommended pressure because it is the minimum necessary to provide proper cooling in all situations. Feel free to experiment with higher pressures (not to exceed 120 psi (827 kPa) at the regulator input).

WARNING

ELECTRIC SHOCK CAN KILL.

•Turn off machine at the disconnect switch on the front of the machine before tightening, cleaning or replacing consumables.

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•The PRO-CUT will cut with consumables that are worn considerably. Many competitive systems require replacement consumables long before a PRO-CUT system does. This is because of the solid state current regulation that the PRO-CUT has. Also, the safety reset circuit provides a means of extending nozzle life. Sometimes a small piece of material breaks off the electrode and bridges the gap between the nozzle and the electrode. In a competitive unit, this would often result in the destruction of the elec- trode and nozzle due to overheating. This will result in the tripping of the PRO-CUT safety circuit. When this happens, turn the power off, remove the nozzle and scrape any debris from its inside cavity with a piece of sturdy wire or a suitable drill bit. Replace the nozzle, turn on the power and continue cutting.

•The electrode has a hafnium insert at the tip which greatly prolongs the life of the consumable. When that insert has been consumed, the machine will automatically turn off output and lock up in “FAULT”. At this point, replace the electrode and the nozzle; it is not recommended to continue cutting with an elec- trode that has consumed all of its hafnium.

•Use of the nozzle with the largest orifice size that pro- duces acceptable cutting results will maximize con- sumable life. Procedures given are all based on a

.042" (1.0mm) orifice size. Smaller orifice sizes con- strict the arc more, raising the energy density and therefore the temperature. Larger orifice sizes have an opposite effect. Small orifice nozzles run hotter and wear faster than large orifice nozzles but pro- duce a finer cut with less kerf width. There is a cer- tain current where each orifice size becomes unsta- ble because it runs too hot. Never use the smallest

.035” (0.9mm) orifice size at outputs above the yel- low range because it will be quickly destroyed.

•The PRO-CUT 60 is capable of operation with a 50 ft. (15.2m) plasma torch. Pilot arc operation may be slightly degraded with this torch installed. Sputtering may occur after the pilot arc is established and occa- sionally the pilot arc may not light after the trigger is depressed*. Keep in mind that the condition of the consumables and air pressure level have a large impact on pilot arc ignition.

*Neither cutting performance nor machine reliabili- ty will be lessened by this condition.

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Lincoln 60 manual All Cases, Suggestions for Extra Utility from the PRO-CUT System
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60 specifications

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