Lincoln Electric INVERTEC SVM129-B Service Manual page 23

C-3
LN-742 or STT-10 WIRE FEEDER
CONNECTION INSTRUCTIONS
The LN-742 or STT-10 is the recommended wire feed-
er for use with the Invertec STT II. Refer to the LN-
742 or STT-10 Operator Manual for Wire Feed
Operation. Refer to Figure C.2 or C.3 and follow the
instructions below to connect the LN-742 or STT-10.
WARNING
ELECTRIC SHOCK can kill.
• Only qualified personnel should perform
this installation.
• Turn the input power OFF at the discon-
nect switch or fuse box before connecting
the wire feeder
1. Turn the Invertec STT II power off.
2. Connect the ARC SENSE LEAD MS connector to
the mating connector on STT II front panel.
REMOTE RECEPTACLE
WORK LEAD
WORK
ACCESSORIES
3. Connect the electrode lead (Twist-Mate) to (+) out-
4. Connect the other end of electrode lead (Step #3)
5. Connect work lead between STT (-) terminal and the
6. Connect the ARC SENSE LEAD "WORK" (lead with
NOTE: For best welding performance make this
7. Connect the wire feeder control cable between the
CONTROL, ELECTRODE, ARC SENSE "ELECT"
AND ARC SENSE "WORK" CABLES SHOULD
BE TAPED TOGETHER.
WIRE FEEDER
CONTROL CABLE
ARC SENSE LEAD
'ELECT"
ARC SENSE LEAD "WORK"
(SHOULD BE LOCATED
AS CLOSE AS POSSIBLE
TO THE WELDING ARC.)
FIGURE C.2 LN-742 to STT II CONNECTION
INVERTEC STT
put terminal on STT II.
and the ARC SENSE LEAD (lead with ring lug, step
#2) together to the gun block on the LN 742.
work piece.
alligator clip) to work piece.
connection as close as possible to the
welding arc.
LN-742 or STT-10 and the 14-pin Wire Feeder
Receptacle on the STT II. For the STT-10 Wire
Feeder: Connect the second wire feeder control
cable between the STT-10 and the 10-pin Remote
Receptacle on the STT II.
WARNING
Turn off input power to the Welding
Power source using the disconnnect
switch at the fuse box before
connecting the wire feeder.
Only qualified persons should install,
ELECTRIC
use or service this machine.
SHOCK
CAN KILL
ELECTRODE LEAD
CONNECT ELECTRODE LEAD AND "ELECT"
ARC SENSE LEAD TOGETHER TO ELECTRODE
TERMINAL OF WIRE FEEDER.
C-3
WIRE FEEDER
LN 742
LN7 GMA
LN9 GMA
NA5R
NA5
CRM after 6-10-96
M17657