Clarke 052249011064, Руководство по эксплуатации

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technique that feels most comfortable and
allows good control and movement.
Position the Torch to the Workpiece
The plasma torch nozzle should be perpendi-
cular to the workpiece. Excessive angling of
the torch can cause the plasma arc to cut
into the side wall of the nozzle, resulting in
damage to the torch components. It is impor-
tant to keep the cutting torch at the proper
distance from the material being cut. This
distance may vary slightly, depending upon
the type of material and thickness of material
being cut, but a general rule of thumb is to
keep the nozzle approximately 1/16 to 1/8
inch from the material being cut.
See Figure 6 for proper torch position.
CUTTING
A “cutting” operation is generally defined as
one where the penetration begins at an
existing edge of the workpiece. Whether this
edge is an outer edge or a previously made
hole somewhere in the workpiece is irrele-
vant. Cutting operations require a slightly dif-
ferent technique than Piercing operations
(described in next section).
1. Position your index finger on the trigger.
2. Hold the torch with the nozzle orifice
directly over the edge of the workpiece.
Note: Arc stretching can occur at the begin-
ning and end of the cut if the arc has to
"stretch" (deviate from a straight, perpendicu-
lar path) to find metal. Arc stretching can
cause the arc to cut into the side wall of the
nozzle.
WARNING
EXPOSURE TO A PLASMA ARC IS
EXTREMELY HARMFUL TO THE EYES
AND SKIN! Prolonged exposure to the plas-
ma arc can cause blindness and burns.
Never strike an arc or begin cutting until you
are adequately protected. Wear flameproof
welding gloves, a heavy long sleeved shirt,
cuffless trousers, high topped shoes and a
welding helmet.
3. With the torch in the starting position pull
the trigger and release, and then immedi-
ately pull the trigger again and hold. The
pilot arc will come on until the cutting arc
starts. (Once on, the main arc stays on
as long as the trigger is held down,
unless the torch is withdrawn from the
work or the cutting motion is too slow.)
4. With the torch nozzle perpendicular to
the workpiece, pull (or push) the torch
across the area to be cut at a moderate,
steady pace.
5. To shut the torch off, simply release the
trigger.
Note: When the trigger is released and the
arc is extinguished, compressed air will con-
tinue to flow for a short period, in order to
cool the torch. DO NOT switch off the
machine until the air has stopped flowing or
damage to the torch may occur.
PIERCING
A “piercing” operation is defined as one
where the plasma arc creates a new pene-
tration in a workpiece. Unlike a Cutting oper-
ation, this means that there is no existing
edge to begin work from. The arc is forced
through the workpiece, thereby creating a
new “edge.” After the initial penetration has
been made, a piercing operation is treated in
the same manner as a cutting operation.
1. Position your index finger on the trigger.
2. Hold the torch approximately 1/8 inch
above the workpiece, with the nozzle ori-
fice directly over the spot on the work-
piece where piercing is desired. It may
be necessary to angle the torch VERY
slightly while at this point to ensure that
sparks and/or spatter will not rebound
into the nozzle cap and nozzle.
Figure 6 . Torch Position