9
T
U
V
W
Fig. 3
Fig. 4
Fig. 2/A
Fig. 2/B
1. Turn the machine on “l” using the switch
C
. The warning
lamp
D
will light to indicate that the machine is on.
2. Press the torch trigger briefly to open the flow of
compressed air. Since the arc is not lit, air leaves the torch
for only 5 sec.
3. Now adjust the pressure, shown on the pressure gauge
F
to 3.5 bar or 50 psi Lift the knob to adjust. Clockwise will
increase and counterclockwise will decrease. Then lock
the knob by pressing it downward.
4. Connect the grounding clamp to the work piece. The
cutting circuit must not be deliberately placed in direct or
indirect contact with the protective wire except in the work
piece.
If the work piece is deliberately grounded using the
protective conductor, the connection must be as direct as
possible and use a wire of at least the same size as the
cutting current return wire, and connected to the work
piece at the same point as the return wire using the return
wire clamp or a second grounding clamp placed in the
immediate vicinity. Every precaution must be taken to
avoid stray currents.
5. Use the knob
M
to adjust the cutting current from 5 to 25 A
based on the work at hand.
6. Make sure that the ground clamp and the work piece are in
good electrical contact, especially with painted or oxidized
metal or with insulated coating; connect the clamp as close
as possible to the cutting area.
Do not connect the grounding clamp to the part of
the material that is to be removed.
7. Press the torch trigger to strike the pilot arc. If cutting does
not begin within 2 seconds, the pilot arc goes out; press
the trigger again to re-strike it.
8. Begin cutting as shown in fig. 2a, avoid starting as shown
in fig. 2b
9. Hold the torch upright while cutting.
10. When you have finished cutting and released the trigger,
air will continue to leave the torch for approximately 40
seconds to allow the torch to cool down.
It is best not to turn the machine off until this cool-
down period is complete.
• To cut perforated or grid metal, activate the "Pilot self
restart" function using the push-button
P
(LED
O
lit). When
you have finished cutting, holding this push-button down
will cause the pilot arc to restart automatically.
Use this function only if necessary to avoid
unnecessary wear on the electrode and nozzle.
•
Should you need to make holes or begin cutting from the
center of the work piece, you must hold the torch at an
angle and slowly straighten it so that the nozzle does not
spray molten metal (see fig. 3). This must be done when
making holes in pieces more than 3 mm or ~.118” thick.
(12 gauge = .105”)
• Should you need to cut several layers of metal, as are
normally used in auto body work, adjust the cutting current
to the minimum values.
For currents between 5 and 10 A it may be helpful to set
the intake pressure to approximately 2 bar or 29 psi.
Turn the machine off when the task is completed.
PLASMA CUTTING - INTRODUCTION
