Thermal Arc ULTRA FLEX 350, Руководство пользователя

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8. To energize the output of the machine, press
the CONTACTOR button so that the light comes on.
If a remote control is being used, the contactor can
be energized remotely using the switch on the re-
mote control.
CAUTION: ONCE THE CONTACTOR IS
ENERGIZED THERE WILL BE OPEN
CIRCUIT VOLTAGE ON THE OUTPUT
TERMINALS OF THE MACHINE. TO
AVOID ELECTRIC SHOCK DO NOT
HANDLE EXPOSED CONDUCTORS AT-
TACHED TO THE POWER SOURCE
TERMINALS WITHOUT PROPER PRO-
TECTIVE CLOTHING AND GLOVES.
9. The power source is now ready to weld. After
the weld is complete, shut the CONTACTOR off to
remove open circuit voltage from the output termi-
nals of the machine.
While welding, the digital meter will show either
actual amps or actual volts. To toggle between
actual amps and actual volts use the A/V button. To
adjust amperage while welding, use the UP and
DOWN buttons. The digital display will automatically
change to the preset amperage. After the adjust-
ments are made, the meter will automatically switch
back to showing actual amps or actual volts. To
adjust arc force while welding, first press the AF/IND
button, then use the UP and DOWN buttons. The
digital meter will change to show the preset arc force
setting. After the adjustment is complete, the meter
will automatically switch back to showing either
actual amps or actual volts.
LIFT GTAW Operation
(See Figure 5-2)
The purpose of Lift GTAW is to allow for striking
the arc by momentarily touching the torch to the
workpiece. The lift circuit functions to reduce the
amperage during the arc start to a low level to give
a good soft start.
1. Connect the work lead and torch lead to the
power source. Figure 5-2 shows typical connections
for DCEN (straight polarity). This is the normal
connection for TIG welding.
2. Provide suitable shielding gas connections and
controls to the torch. The power source does not
provide connections for the shielding gas.
3. Select the proper tungsten size and type for the
job. Table 5-1 gives a basic guideline to the amper-
age ranges of various tungstens.
4. If a remote control such as a foot pedal or hand
control is going to be used, connect the remote
control to the 19 pin amphenol receptacle on the
rear of the machine.
5. Turn AC power switch to the ON position. The
initial power up sequence will be complete in ap-
proximately three seconds.
6. Press the LIFT GTAW button on the control
panel. This will select the Lift TIG process.
7. To set welding amps, use the UP and DOWN
buttons. For local control, the display will show the
preset welding amperage. For remote control, the
display will show the preset maximum amperage.
The foot pedal or hand control will have control from
0 to this maximum setting.
Figure 5-2
430429-465
OPERATION
February 28, 2000 5-3