OPERATION |
CUTTING OPERATIONS
BEFORE CUTTING
WARNING
ELECTRIC SHOCK CAN KILL.
Disconnect input power by removing the plug from the receptacle before assembling or disassembling torch parts, or torch and lead assemblies.
Check and follow instructions listed in the “Safety and Installation” section of this manual.
TORCH PARTS
Check the torch for proper assembly. Install proper torch parts for the desired application (refer to the Torch Consumable Parts Selection Section).
NOTE: The power supply will not operate unless the torch shield cup is fully seated against the PIP (Parts in Place) pins in the torch head.
INPUT POWER
Check the power source for proper input voltage. Make sure the power source meets circuit protection and wiring requirements.
Plug in power cord to supply input power to the unit.
GROUND CABLE
Check for a solid ground cable connection to the workpiece.
AUTOMATIC PURGE SYSTEM
Place the ON/OFF switch to the ON position. If the line voltage is OK, the green LED will turn on. Activate the torch trigger to initiate air purge. There will be a 3 second delay to remove any condensation that may have accumulated in the torch and air lines while the system was shut down. When the air purge (Air safety time) is complete, pilot arc will be initiated.
FIGURE B.1
KNOB
CHECKING AIR QUALITY
To check air quality, deactivate the torch
When preparing to cut, position the machine as close to the work as possible. Make sure you have all materials needed to complete the job and have taken all safety precautions. It is important to follow these operating steps each time you use the machine.
•COMPRESSED AIR
The PLASMA 20 requires compressed air to be attached to the unit. The input air pressure mini- mum must be 72.5 PSI, 5 Bar and must not exceed 150 PSI, 10.3 Bar. An air regulator is included with the unit with optimum pressure setting set to 65 PSI, 4.5 Bar.
The unit is also equipped with an air filter which cap- tures water and oil vapor. The vapor collected can be drained out of the bottom of the unit by turning the drain button. The unit will not operate if the input air pressure is below 55 PSI, 3.8 Bar.
Three Position Drain knob: (See Figure B.1)
1.Open
2.Open when no air pressure, closed when air pres- sure.
3.Closed
CUTTING WITH A HAND TORCH
•Turn the main power and the machine power switch on.
-The fan should start.
-The
•Be sure that the work lead is clamped to the work- piece before cutting.
•Set the output current control knob at maximum position for higher cutting speed and less dross for- mation. Reduce the current, if desired to reduce the kerf (cut) width, heat affected zone or travel speed as required.
PLASMA 20