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DIP Switch 4: 4 Step Restart Enable
This controls the 4 Step Restart function. When the switch is ON the 4 Step Restart function is enabled. ("Foot pedal" remote controls should never be used with the 4 step sequences.)
1.Press and hold the TIG torch trigger to start the sequence. The machine will open the gas valve to start the flow of the shielding gas. After the preflow time, the output of the machine is turned ON. At this time the arc is started according to the selected welding mode (Lift TIG or HF TIG). After the arc is started the output current will be at the Start/Crater current. This condition can be maintained as long or as short as necessary.
FIGURE b.7
(1) | (2) | (3) | (4) |
ÐÐGAS ONÐÐ
If the Start/Crater current is not necessary, do not hold the TIG torch trigger as described at the beginning of this step. Instead, quickly press and release it. In this condition, the machine will automatically pass from Step 1 to Step 2 when the arc is started.
2.Release the TIG torch trigger to start the main part of the weld. The output current will be increased (upslope) to the welding current.
3.Press and hold the TIG torch trigger when the main part of the weld is complete. The machine will now decrease the output current at a controlled rate (downslope), until the Start/Crater current is reached. This Start/Crater current can be main- tained as long or as short as necessary.
3A. If it is not necessary to maintain the Start/Crater current, the TIG torch trigger can be pressed and released instead of holding it. In this case, step 4 will automatically follow.
4.Release the TIG torch trigger. The output current of the machine will turn OFF and the gas valve will remain open for the duration of the postflow time.
As shown in figure B.8, after the TIG torch trigger is quickly pressed and released from step 3A, it is possible to press and hold the TIG torch trigger another time to end the downslope time and main- tain the output current at the Start/Crater current. When the TIG torch trigger is released the output will turn OFF and postflow will begin.
FIGURE b.8
(3A) (4)
TORCH
BUTTON
OUTPUT
CURRENT
GAS
As shown in figure B.9, again after the TIG torch trigger is quickly pressed and released from step 3A, it is possible to quickly press and release the TIG torch trigger a second time to end the downs- lope time and stop welding.
FIGURE b.9
(3A)
TORCH
BUTTON
OUTPUT
CURRENT
ÐÐGAS ONÐÐ
GAS
