MAWA-050A
5. Welding
5-17
(6) -3. Adjustment
After a start, the head goes down outputting gas for the pre-flow time. After the end of the pre-flow
time, the head goes up outputting the initial current for the initial current time. After the end of the
initial current time, welding is started. Adjust the initial current time so that LOST may not occur and
the welding current may not be affected greatly. For the initial current time, set a time until the
distance from the gap is stopped at the head go-up end. Adjust the initial current time in
consideration of the automatic machine status.
PRE [ms]: Pre-flow time
setting
FST [ms]: Initial current
time setting
FST [A]: Initial current
setting
Adjust items
,
and
and the distance from the gap to obtain the optimum conditions.
Remarks
If the air type welding head is used when the touch start is selected, the pre-flow time is used as
the head go-down time. Only when the “Gas flow control” item on the Switch select screen (1/2)
is set to “ON”, the gas switch valve is closed. If this is set to “OFF”, this gas switch valve is not
operated. When the servo motor type welding head (
MH-TL01A
) is used, gas is operated by the
GAS output signal from the head controller regardless of the welding power supply setting.
(6) -4. Start using an external input/output signal
A start using an external input/output signal will be described below.
When the welding power supply is in the READY status, the welding current output can be started
from the device connected to the outside.
For the details of connection and signals, refer to “2. (3) Interface” and “6. Timing Chart.”
Distance
from the gap
Gas
Initial current
Welding current
Distance
from the gap
Pre-flow time
Initial current time
Welding
