Tweco 25mm Cutmaster - Manual (Page 40)

CUTMASTER 25MM
OPERATION Manual 0-5080
4T-6
Piercing With Hand Torch
1. The torch can be comfortably held in one hand
or steadied with two hands. Position the hand to
press the Trigger on the torch handle. With the
hand torch, the hand may be positioned close to
the torch head for maximum control or near the
back end for maximum heat protection. Choose
the technique that feels most comfortable and
allows good control and movement.
NOTE
The tip should never come in contact with
the workpiece except during drag cutting
operations.
2. Angle the torch slightly to direct blowback
particles away from the torch tip (and operator)
rather than directly back into it until the pierce
is complete.
3. In a portion of the unwanted metal start the
pierce off the cutting line and then continue the
cut onto the line. Hold the torch perpendicular
to the workpiece after the pierce is complete.
4. Hold the torch away from your body.
5. Slide the trigger release toward the back of the
torch handle while simultaneously squeezing the
trigger. The pilot arc will start.
A-02986
Trigger
Trigger Release
6. Bring the torch within transfer distance to the
work. The main arc will transfer to the work,
and the pilot arc will shut off.
NOTE
The gas preflow and postflow are a character-
istic of the power supply and not a function
of the torch.
When the shield cup is properly installed,
there is a slight gap between the shield cup
and the torch handle. Gas vents through this
gap as part of normal operation. Do not at-
tempt to force the shield cup to close this gap.
Forcing the shield cup against the torch head
or torch handle can damage components.
7. Clean spatter and scale from the shield cup and
the tip as soon as possible. Spraying the shield
cup in anti - spatter compound will minimize the
amount of scale which adheres to it.
Cutting speed depends on material, thickness, and the
operator’s ability to accurately follow the desired cut
line. The following factors may have an impact on sys-
tem performance:
• Torch parts wear
• Air quality
• Line voltage fluctuations
• Torch standoff height
• Proper work cable connection
4T.05 Gouging
!
WARNING
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 acti-
vated.
Disconnect primary power to the system
before disassembling the torch, leads, or
power supply.
CAUTION
Sparks from plasma gouging can cause dam-
age to coated, painted or other surfaces such
as glass, plastic, and metal.
Check torch parts. The torch parts must cor-
respond with the type of operation. Refer to
Section 4T.07, Torch Parts Selection.