Tweco 220 VAC 50Hz Drag-Gun - Manual (Page 18)

DRAG-GUN Plasma Cutter (Australia) 14 Operating Manual 0-2737
Sequence of Operation
The following is a typical sequence of
operation for this cutting system:
1 Place the primary
power ON/OFF
switch on front
panel to the ON
position.
AC POWER
indicator light
comes on.
Fan turns on.
2 Wear protective
clothing (refer to
Section 1); activate
torch switch.
Main power relay
closes.
Pilot arc is
established.
3 Move torch within
transfer distance of
workpiece (or start
with tip on the
workpiece).
Main arc transfer.
Pilot arc off.
4 Complete cutting
operation; turn torch
switch off.
Main Arc off.
5 When finished
cutting session,
place the primary
power ON/OFF
switch to the OFF
position.
AC Power
Indicator light off.
Figure 5-1 Sequence of Operation
5.1 Cutting T 5.1 Cutting T 5.1 Cutting T 5.1 Cutting T 5.1 Cutting Techniques echniques echniques echniques echniques
NOTE
Drag cutting - the torch tip is dragged along the
surface of the workpiece while cutting.
Standoff cutting - the torch tip is elevated from the
workpiece slightly while cutting. Standoff height
should be no more than 1/8" (3.2 mm); place your
other hand underneath to steady.
The DRAG-GUN is primarily designed for drag cutting,
but in some instances can be used successfully for stand-
off cutting.
A. Cutting A. Cutting A. Cutting A. 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