Manual 0-2470 41 OPERATION
WARNING
CAUTION
CAUTION
WARNING
Gouging Parameters
Torch Travel Speed
Current Setting
Lead Angle
Be sure the operator is equipped with proper gloves, clothing,
eye and ear protection and that all safety precautions at the front
of this manual have been followed. Make sure no part of the
operator’s body comes in contact with the workpiece when the
torch is activated.
Sparks from plasma gouging can cause damage to coated,
painted or other surfaces such as glass, plastic, and metal.
Check torch parts. The torch parts (shield cup, tip, electrode, and
gas distributor) must correspond with the type of operation (drag
cutting, standoff cutting, or gouging). Refer to Torch Parts Selec-
tion (page 31).
Disconnect primary power to the system before disassembling
the torch, leads, or power supply.
Gouging performance depends on parameters such as torch
travel speed, current level, lead angle (the angle between the
torch and workpiece), and the distance between the torch tip and
workpiece (standoff).
Optimum torch travel speed for gouging is between 20 and 120
inches per minute (0.5 and 3.0 meters per minute). Travel speed is
dependent on current setting, lead angle, and mode of operation
(hand or machine torch).
Current settings depend on torch travel speed, mode of operation
(hand or machine torch), and the amount of material to be re-
moved.
The angle between the torch and workpiece depends on the
current setting and torch travel speed. At 35 amps, the recom-
mended lead angle is 35°. An angle greater than 45° may result in
inconsistent metal removal. If the lead angle is too small (less
than 35°), less material may be removed, requiring more passes.
In some applications, such as removing welds or working with
light metal, this may be desirable.
4.10 GOUGING
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