Tweco CutMaster 12mm-20mm-25mm - Manual (Page 38)

CUTMASTER 12mm, 20mm, 25mm
OPERATION 4T-6 Manual 0-5117
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 op-
erator) 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 perpen-
dicular 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.
NOTES
The gas preflow and postflow are a char-
acteristic 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 opera-
tion. Do not attempt 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 system 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 precau-
tions 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.
Disconnect primary power to the system
before disassembling the torch, leads, or
power supply.