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10. OPERATION (continued)
(14) Soft pulse: Function No. “16” ---- x
By turning Function No. 16 “ON”, it is possible to change pulse welding to “soft pulse” in case
where the pulse is “ON” in DC TIG welding. In soft pulse, current is changed smoothly, and soft
arc is produced, compared with “standard” pulse, thereby reducing a welding sound. This soft
pulse is suitable for thin plate welding since it is hard to burn through or melt down, compared
with “standard” pulse at the same average current.
In case where a soft pulse is used, it is recommended that the pulse frequency should be set at
10Hz or more and the pulse width should be set at 40% to 60%.
(15) Current adjustment by torch switch: Function No. “17” ---- x
By turning Function No. 17 “ON”, the output current can be changed by the current change
amount set up in advance by torch switch clicking operation only during the self-holding period in
the “Crater-ON” or “Crater-ON (Repeat)” mode.
Function No. “18”: The current change amount is set up by single clicking.
Function No. “19”: The current change amount is set up by double clicking.
The current change amount setup range is –50A to +50A.
(Example)
Crater-ON, no initial current, welding current 60A and crater current 20A
F18: -10A
F19: 20A
<Precautions>
1) If this function is set to “Effective” (ON), the function of F3 becomes invalid (OFF) automatically,
while this function becomes invalid (OFF) automatically by validating “F3” (ON).
2) It is necessary to press the switch for as long as 0.3 sec. or more during transfer to crater at
startup.
3) In case where the operation is transferred from crater to the main welding in the “Crater-ON”
(Repeat) mode, the operation starts with the welding current outputted before transferring to the
crater.
Within 0.3sec
Within 0.3sec Within 0.3sec Within 0.3sec Within 0.3sec Within 0.3sec 0.3sec
ON
OFF
Welding
Current
Torch
Switch
60A
50A
40A
60A
50A
70A
60A
20A
Crater
Current
single
clicking
double
clicking