6
Systematics , Inc. 1025 Saunders Lane West Chester, PA. 19380
FITTING AND THREADING THE ELEC-
TRODE WIRE (Continued)
12.Install the contact tip over the
protruding wire and tighten it
firmly using a proper size
wrench. Make sure the tip is the
correct size for the wire being
used.
13.Install the nozzle on the torch.
For steel, the contact tip
should be flush or stick out up
to 1/16 inch beyond the end of
the nozzle. For aluminum, the
contact tip should be recessed
1/8 to 1/4 inch inside the
nozzle. Using wire cutters,
trim off the wire so the stickout
is approximately 1/4 inch for
steel or 1 inch for aluminum.
For aluminum, the end of the
wire should be bent over so it
does not JAM into the work. This
is called a "scratch start".
FITTING AND THREADING THE ELEC-
TRODE WIRE (Continued)
7. Release the wire from the spool
and trim off the kinked end with
wire cutters. The wire must be
straight when it enters the
inlet guide.
8. Thread the electrode wire through
the inlet guide, over the feed
roll and into the torch liner.
Ensure that the wire locates in
the feed roll groove. Do not
allow the wire on the spool to
loosen.
9. Close and relatch the pressure
roll arm.
10.Stretch the torch cable straight
out in front of the machine
making sure there are no kinks.
Remove the nozzle and contact
tip from the torch.
11.Turn "ON" the circuit breaker on
the front of the machine. The
cooling fan will start and the
"ON" indicator light will illu-
minate. Set the VOLTAGE control
switch to "4", the function
switch to "CONTINUOUS WELD" (if
the unit has the optional SSTP-
2 installed) and the WIRE SPEED
control to "7". Pull the
trigger on the MIG torch. The
wire feed system will start and
wire will be fed through the
cable liner and torch. If the
wire does not feed, or appears
to slip, tighten the pressure
roll arm adjusting nut. Feed
the wire until it protrudes
from the front of the torch
approximately six inches.
Keep hands and face away
from the front of the
torch and do not allow the
wire to contact ground.
The wire is electrically
HOT when the torch trigger
is actuated.
1"
STICK-OUT
1/4"
STICK-
OUT
FOR ALUMINUM:
CONTACT TIP
RECESSED 1/8" - 3/8"
FOR STEEL:
CONTACT TIP
FLUSH WITH NOZZLE
14.For steel welding only, spray
anti-spatter compound inside
the nozzle and on the outside of
the contact tip. For aluminum
or stainless steel welding, NO
anti-spatter compound can be
used as it will contaminate the
weld.
FIGURE 6.
WIRE STICKOUT - STEEL, ALUMINUM
CAUTION
