Polarity; Process; Output Control - Lincoln Electric ASPECT 375 Operator's Manual

ASPECT™ 375

Polarity

This switch allows the user to set the polarity of the
process in use. For DC GTAW welding the output is
DCEN and for DC SMAW welding the output is DCEP.
(See Figure B.4)
(Changing Polarity to DCEN for SMAW welding is done in
the advanced operations menu. See Set-up Menu
"SMAW")

Process

This switch allows the user to set the desired process.
(See Figure B.5)
1. High-Frequency TIG
2. Touch Start TIG ®
3. Stick – Soft Mode (7018 style electrodes)
4. Stick- Crisp Mode (6010 Style electrodes)

Output Control

This switch allows the operator to set the desired output
control method (See Figure B.6). To control the output
with 2-step or 4-step, either a remote trigger (arc start
switch) or remote trigger with amperage control (foot or
hand amptrol) may be used.
1. 2-Step (See Figure B.7 and B.8) – With 2-step trigger
and a TIG welding mode selected, the following weld
sequence will occur. If a standard foot amptrol is
connected, it will take control of most sequencer
functions, but pre-flow, starting current, finishing
current, and post-flow can be defined. With an arc
start switch, all sequencer functions should be
defined.
FIGURE B.7
1
A. Press and hold the torch trigger to start the
sequence. The machine will open the gas valve to
start the flow of shielding gas according to the set
pre-flow time. After the pre-flow, the output of the
machine is turned ON. The arc is started according
to the selected weld mode and the specified starting
current. After starting, the output current will be
increased at a rate dependent on the specified initial
slope time, until the operating amperage is reached.
DC
AC
1
3
1
(A)
A
B. Release the TIG torch trigger to stop welding. The
machine will decrease the output current at a rate
determined by the specified final slope time, until the
finishing current is reached and then the output of
the machine is turned OFF.
After the arc is turned OFF, the shielding gas will
continue to flow to protect the electrode and weld as
specified by the post flow time.
This 2-Step sequence is the factory default setting.
B-6
OPERATION
FIGURE B.4
FIGURE B.5
2
4
FIGURE B.6
2
3
FIGURE B.8
(B)