User Guide

B-8
OPERATION
B-8
1) Press end of gun against a solid object that is
electrically isolated from the welder output and
press the gun trigger for several seconds.
2) If the wire "birdnests", jams, or breaks at the drive
roll, the drive roll pressure is too great. Back the
pressure setting out 1/2 turn, run new wire through
gun, and repeat above steps.
3) If the only result is drive roll slippage, disengage
the gun, pull the gun cable forward about 6" (150
mm). There should be a slight waviness in the
exposed wire. If there is no waviness, the pres-
sure is too low. Increase the pressure setting
turn, reconnect the gun, tighten locking clamp and
repeat the above steps.
PROCEDURE FOR SETTING ANGLE
OF FEEDPLATE
1) Loosen the clamping collar screw using a 3/16"
Allen wrench. The clamping collar screw is
accessed from the bottom of the feedplate. It is
the screw which is perpendicular to the feeding
direction.
2) Rotate feedplate to the desired angle and tighten
clamping collar screw.
GAS GUARD REGULATOR SETTING
NOTE: Gas supply pressure must be regulated to a
maximum of 80 psi(5.5 bar).
1) With the gas supply shut off, the Gas Guard regu-
lator flow adjusting Key should be set to maximum
(full clockwise) which is rated to be 60 SCFH (28
l/min).
2) Adjust gas supply flow rate for a level higher than
will be required, then adjust Gas Guard flow
adjusting Key counterclockwise to the desired gas
flow rate.
MAKING A WELD
1) Use only an STT-II power source with the STT-10
Wire Feeder.
2) Properly connect the electrode and work leads for
the correct electrode polarity.
3) Use the Trigger Mode Selection key to set desired
trigger mode for each procedure. (Refer to “Trigger
Mode Selection” in this section)
4) Use Control Select and encoder knobs to set desired
Weld feed speed and current then Run-in speed to
optimize arc starting. (Set for each procedure if
using front panel, or optional dual procedure switch.)
(Refer to “Operation Keys” and “Display Control
Keys” in this section)
5) Adjust the wire feed acceleration if desired, for
each feeder and procedure. (Refer to “Acceleration
Selection” in this section)
6) Use Control Select and top Encoder knob to set
desired timers. (Refer to “Trigger Mode Selection”
in this section)
7) Feed the electrode through the gun and cable and
then cut the electrode within approximately 3/8”
(9.5 mm) of the end of the contact tip for solid wire
and within approximately 3/4” (19mm) of the exten-
sion guide for cored wire.
8) Connect work cable to metal to be welded. Work
cable must make good electrical contact to the
work. The work must also be grounded as stated
in "Arc Welding Safety Precautions".
9) If used, be sure shielding gas valve is turned on.
10) Position electrode over joint. End of electrode
may be lightly touching the work.
11) Lower welding helmet, close gun trigger, and start
welding. Hold the gun so the contact tip to work
distance gives the correct electrical stickout as
required for the procedure being used.
12) To stop welding, release the gun trigger and then
pull the gun away from the work after the arc goes
out and Postflow time, if used, is over.
13) If necessary to optimize arc starting, readjust wire
speed acceleration, (Refer to “Acceleration
Selection” in this section) and/or Run-In speed,
(Refer to “Display Control Keys” in this section).
STT-10
• When using an Open Arc process, it
is necessary to use correct eye,
head, and body protection.
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WARNING