OM-356 Page 33
5-17. Start/Crater Sequence Controls
1 Sequence Selection Switch
Place switch in Start/Crater posi-
tion.
2 Start Time/Spot Time
Control
Use control to select 0−15 sec-
onds of start time.
3 Start Current Control
Use start control to select a start-
ing current (3−400 amps) that is
different from the weld current.
4 Crater Time Control
Use control to reduce current
over a set period of time (0−15
seconds) at the end of the weld
cycle when NOT using a remote
current control.
5 Final Current Control
Final current is the current to
which weld current has sloped
down to (0−100% of current set
on Amperage Adjust control).
Application:
Start current can be used while
GTAW welding to assist in pre-
heating a cold material prior to
depositing filler material. Start
current can also be used for
SMAW to ensure a more consis-
tent arc strike.
Crater Time can be used while
GTAW welding when material be-
ing welded is crack sensitive, and
the operator is using an on/off
type control to start and stop the
welding process.
NOTE: Use this method when
the function of a remote control is
desired, but only a remote on/off
control is available.
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