21
WELDING BY MANUAL OPERATION
Welding Crater Control Enable (Self-holding Crater Operation)
Welding with crater control enabled is used for welding a medium-thickness plate in order to
fill up a bead concave at the end of welding.
enable : ON
disable : OFF
Operation Procedure
Set the CRATER
“
ON/OFF
”
Selector switch to CRATER
“
ON
”
and turn on/off the torch switch
twice to perform welding.
Again Operation Timing Chart
Thus, operating the torch switch allows self-hold of switch operation and lowers the welding
current at the end of welding to enable crater treatment.
If arc discontinues for 0.5 second or more during welding, however, self-hold will be cancelled.
The following two kinds of welding are allowed by operating the
“
CRATER ON/OFF
”
selector switch
on the operation panel and the torch switch.
Be sure to read
“
Duty cycle
”
on Page 22, and observe a duty cycle in using the equipment.
Using only this switch
allows
you
to
start/stop operation.
CRATER
ON/OFF
Selector Switch
Welding Arc Start
Welding Arc
Maintained
(Self-Hold)
Changed
to
Crater
Welding
Arc
Welding Arc Stop
Torch Switch ON
Torch
Switch OFF
Torch Switch
ON Again
Torch
Switch
OFF
Torch Switch
Gas Supply
Wire Feed
Welding Voltage
Welding Current
Welding Condition Adjustment
Tpf = Gas preflow time
☆ = Arc start timing
★ = Arc stop timing
Summary of Contents for YD-500KR
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