Lincoln Electric IM710 SP-170T - Manual (Page 19)

B-4 B-4 OPERATION
Wire Threading
Refer to Figure B.4
1. Release the Spring Loaded Pressure Arm (1) rotate
the Idle Roll Arm (2) away from the Wire Feed Drive
Roll (3). Ensure that the groove size in the feeding
position on the drive roll matches the wire size being
used. See Maintenance section for further information.
2. Carefully detach the end of the wire from the spool. To
prevent the spool from unwinding, maintain tension on
the wire until after step 5.
3. Cut the bent portion of wire off and straighten the first
4” (100 mm).
4. Thread the wire through the ingoing guide tube (4),
over the drive roll (3), and into the outgoing guide tube
(5).
5. Close the idle roll arm (2) and latch the spring loaded
pressure arm (1) in place. Rotate the spool counter-
clockwise if required to take up extra slack in the wire.
6. The idle roll pressure adjustment wing nut is factory
set to approximately five full turns from where thewing
nut first engages the threads of the pressurearm (1). If
feeding problems occur because the wire is flattened
excessively, turn the pressure adjustment counter-
clockwise to reduce distortion of the wire. Slightly less
pressure may be required when using 0.023 – 0.025"
(0,6 mm) wire. If the drive roll slips while feeding wire,
the pressure should be increased until the wire feeds
properly.
When inching the welding wire, the drive rolls, the
gun connector block and the gun contact tip are elec-
trically energized relative to work and ground and
remain energized for several seconds after the gun
trigger is released.
7. Refer to Figure B.5. Remove gas nozzle and contact
tip from end of gun.
8. Turn the SP-170T ON (“I”).
9. Straighten the gun cable assembly.
10. Depress the gun trigger switch and feed welding
wire through the gun and cable. (Point gun away
from yourself and others while feeding wire.)
Release gun trigger after wire appears at end of
gun.
11. Turn the SP-170T OFF (“O”).
12. Replace contact tip and gas nozzle.
13. Refer to Figure B-6. Cut the wire off 1/4” – 3/8” (6
– 10 mm) from the end of the tip. The SP-170T is
now ready to weld.
WARNING
FIGURE B.4
The Wire Drive Feed Roll can
accommodate two wire sizes by
flipping the wire drive feed roll
over.
FIGURE B.5
Gun Handle
Gas Diffuser/
Contact Tip
Gas Nozzle
1
2
3
4
5
SP-170T