Tweco A80-A120 CutMaster - Manual (Page 38)

CUTMASTER A80, A120
OPERATION Manual 0-5119
4T-6
WARNING
The straight edge must be non - conductive.
A-03539
Non-Conductive
Straight Edge
Cutting Guide
Using Drag Shield Cup With Straight Edge
The crown shield cup functions best when cutting
3/16 inch (4.7 mm) solid metal with relatively
smooth surface.
Drag Cutting With a Hand Torch
Drag cutting works best on metal 1/4" (6 mm)
thick or less.
NOTE
For best parts performance and life, always use
the correct parts for the type of operation.
1. Install the drag cutting tip and set the output
current.
2. 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 protec-
tion. Choose the holding technique that feels
most comfortable and allows good control and
movement.
4. Keep the torch in contact with the workpiece
during the cutting cycle.
5. Hold the torch away from your body.
6. 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
7. 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.
3
4
Art # A-03383
Trigger
2
1
Trigger Release
8. Cut as usual. Simply release the trigger as-
sembly to stop cutting.
9. Follow normal recommended cutting practices
as provided in the power supply operator's
manual.
NOTE
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 attempt to force the
shield cup to close this gap. Forcing the shield
cup against the torch head or torch handle can
damage components.
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 pro-
tection. 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.