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ELECTRIC SHOCK can kill.
•Turn off machine at the disconnect switch on the front of the machine before tightening, cleaning or replac- ing consumables.
-Check the conditions of the inside of the nozzle. If debris has collected, rub the electrode on the inside bottom of the nozzle to remove any oxide layer that may have built up. Refer to
“Suggestions for Extra Utility from the Pro-Cut System.”
-Check the condition of the electrode. If the end has a
•Replace the nozzle when the orifice exit is eroded away or oval shaped.
•After the problem is found, or if there is nothing apparently wrong, reset the machine by pressing the "Reset" button. (It is possible for electrical noise to trip the safety circuit on rare occasions. This should not be a regular occurrence.)
•If the machine does not reset or continues to trip, consult the Troubleshooting Section.
•Use the proper cutting or gouging procedures referred to in “Procedure Recommendations” below.
USER RESPONSIBILITY
Because design, fabrication, erection and cutting vari- ables affect results, the serviceability of a product or structure is the responsibility of the user. Variation such as plate chemistry, plate surface condition (oil, scale), plate thickness, preheat, quench, gas type, gas flow rate and equipment may produce results different from those expected. Some adjustments to proce- dures may be necessary to compensate for unique individual conditions. Test all procedures duplicating actual field conditions.
Preheat temperature control is not necessary in most applications when plasma arc cutting or gouging. Preheat temperature control may be necessary on high carbon alloy steels and heat treated aluminum for crack resistance and hardness control. Job condi- tions, prevailing codes, alloy level, and other consider- ations may also require preheat temperature control. The recommended minimum preheat temperature for plate thickness up to 1/2 in. (12.7mm) is 70°F (21.1°C). Higher temperatures may be used as required by the job conditions and/or prevailing codes. If cracking or excessive hardness occurs on the cut face, higher pre- heat temperature may be required.
PROCEDURE RECOMMENDATIONS
When properly used, plasma arc cutting or gouging is a very economical process. Improper use will result in a very high operating cost.
GENERAL - IN ALL CASES
•Follow safety precautions as printed throughout this manual and on the machine.
THIN GAUGE SHEET METAL
Torch Standoff | Machine Output Setting |
DRAG thru 1/16" | OutputSetting |
Standoff | Min..thruMidMid. Range- |
|
|
Output set below
•The nozzle may be dragged on the metal surface, touching it lightly to the surface after piercing a hole. Current control should be set below the
•Do not allow cable or body to contact hot surface.
