3-9
S
ETUP
Operator Manual
WORK CABLE AND CLAMP
The work clamp must be attached to the workpiece when plasma cutting. Ensure that the work clamp
and the workpiece make good metal-to-metal contact. Attach the work clamp as close as possible to
the area being cut to reduce exposure to electric and magnetic fields (EMF). Do not attach the work
clamp to the portion of the workpiece to be cut away.
GAS SUPPLY REQUIREMENTS
The gas supply for the Powermax1100 can be either air or nitrogen. Air can be supplied as shop
compressed air or cylinder compressed air. Nitrogen can be supplied from compressed gas cylinders
or liquid containers. A high-pressure regulator on either type of supply must be used and must be
capable of delivering the following:
400 scfh/6.7 scfm (189 l/min) at a pressure of 90 psi (6.2 bar) to the filter on
the power supply.
The filter location is shown in Fig. 3-13.
WARNING
Do not allow the gas inlet pressure to the filter on the power supply to exceed 120 psi (8.2
bar). The plastic filter bowl is rated for 150 psi (10.3 bar) and may explode if this pressure
is exceeded. See the label on the filter bowl for other safety warnings.
Air Supply Quality
The cylinder or shop compressed air supply must be clean, dry and oil-free. If air supply quality is poor,
cut speeds decrease, cut quality deteriorates, cutting thickness capability decreases, and parts life
shortens.
Figure 3-11 Proper Work Clamp Connection
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