Tweco Drag-Gun User Manual

Page 19

Operating Manual 0-2682

DRAG-GUN Plasma Cutter

The DRAG-GUN is primarily designed for drag cutting,
but in some instances can be used successfully for stand-
off cutting.

A. Cutting

1. The torch can be comfortably held in one hand or stead-

ied with two hands. Choose the technique that feels
most comfortable and allows good control and move-
ment. Position the index finger or thumb to press the
control switch on the torch handle.

Figure 5-2 Using One Hand to Cut

Figure 5-3 Using Second Hand for Support When

Cutting

2. Hold the torch on a slight angle to the workpiece with

the front of the tip at the edge of the workpiece (or
slightly above) at the point where the cut is to start.
When starting at the edge of the plate, do not pause
at the edge and force the arc to "reach" for the edge of
the metal. Establish the cutting arc as quickly as pos-
sible.

3. With the torch in starting position, press and hold the

torch switch. The pilot arc will come on and remain
on until the cutting arc starts.

NOTE

Limit piloting time to conserve torch parts. Refer
to section 5.5C for more information.

CAUTION

Torch parts may get quite hot during normal op-
eration. Always wear light cutting gloves when
changing torch parts just after operating the Drag-
Gun system.

4. Once on, the main arc remains on as long as the torch

switch is held down, unless the torch is withdrawn
from the work or torch motion is too slow. If the cut-
ting arc is interrupted, the pilot arc comes back on
automatically. (You may not notice a difference).

5. To shut off the torch simply release the control switch.

B. Piercing

1. For piercing, position the tip approximately 1/8" (3.2

mm) above the workpiece. Angle the torch slightly to
direct sparks away from the torch tip and operator.

Figure 5-4 Piercing

2. Initiate the pilot arc and lower the tip of the torch until

the main cutting arc transfers, sparks start.