Lincoln Electric Aspect 230 DC Operator's Manual page 16

ASPECT ® 230 DC
1. 2-Step (See Figure B.6 and B.7) – 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 must be defined by the user.
FIGURE B.6
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.
FIGURE B.7
(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.
2. 4-Step (See Figure B.8) – With 4-step trigger mode and a TIG
welding mode selected, the following weld sequence will occur. In
4-step, all sequencer functions should be set. If a standard foot
amptrol is connected, only its trigger input is functional and the
remote output control will be disabled
FIGURE B.8
(B)
2
4-Step Functionality
(See Figure B.9)
FIGURE B.9
(A) (B)
(1)
A
A. Press and hold the TIG 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. The
starting current will be held until the torch trigger is released.
B. Releasing the trigger starts the initial slope function. The output
current will be increased at a rate dependent on the specified
initial slope time, until the operating amperage is reached.
If the torch trigger is pushed during the upslope time, the arc
will immediately shut off and output will be switched OFF.
C. When the main weld is complete, push and hold the torch trigger
to start the final down slope. The machine will decrease the
output current at a rate determined by the specified final slope
time, until the finishing current is reached.
D. The finished current will be maintained for as long as the torch
trigger is held. Upon releasing the torch trigger, output will be
switched OFF and the post flow time will start.
3. Output On-This function is designed to be used when TIG
welding without the use of an arc-start controller. If "ON" is
selected, the machine's output terminals are fully energized.
Operator touches tungsten initiating the starting process. Once
the tungsten is lifted from the work piece the amperage will
proceed to welding amperage. Output "ON" is always illuminated
when STICK welding.
(See Figure B.10)
FIGURE B.10
B-4
OPERATION
(C) (D)
3