Hobart Welding Products AIRFORCE OM-279 - Manuel (Page 20)

OM-279 Page 16
3-3. Sequence Of Operation
Put On Personal
Safety
Equipment
After cutting arc starts, slowly
start moving torch across metal.
Adjust torch speed so
sparks go thru metal and
out bottom of cut.
Pause briefly at end of
cut before releasing trigger.
Install &
Connect
Equipment
EXAMPLE Of Cutting Operation
ST-801 400-A
Press trigger. Pilot arc starts.
Postflow continues for approx. 20 to
30 seconds after releasing trigger;
cutting arc can be instantly
restarted during postflow by
pressing trigger.
Check Torch Tip,
Electrode, And
Retaining Cup
Check Gas/Air
Pressure
Set
Controls
Begin
Cutting
Turn On
Power Source
The pilot arc starts immediately when
trigger is pressed.
Place drag shield on edge of metal,
or allow correct standoff distance –
approximately 1/8 in (3 mm).
Do not clean torch by hitting it against a
hard surface. Hitting hard surfaces can
damage torch parts and stop proper opera-
tion. Inspect shield cup, tip, and electrode for
wear before cutting or whenever cutting
speed has been significantly reduced (see
torch Owner’s Manual). Do not operate
torch without a tip or electrode in place.