Welding Operations - Lincoln Electric SP-135 PLUS IM725 Operator's Manual

B-3
1 1
FIGURE B.1a
4. Circuit Breaker – Protects machine from damage if
maximum output is exceeded. Button will extend
out when tripped (Manual reset). Refer to Figure B.1b.
5. Gun Trigger - Activates welding output, wire feed,
and gas solenoid operation. Releasing the trigger
deactivates welding and simultaneously activates
the "burnback" function so that the welding wire
does not stick in the weld puddle.
6. Optional K695-2 Spot/Stitch Controls (see ACCES-
SORIES section) - If present, replaces Blank Panel
Assembly located on the center panel inside the
case door:
Mode Switch - Selects between Spot, Stitch, or
Seam (normal welding) mode. Spot mode welds for
an adjustable length of time (set by Time Control;
see below) and then stops, whenever the gun trig-
ger is depressed and held. Stitch mode cycles
between welding and not welding for an adjustable
length of time (also set by Time Control) while the
gun trigger is depressed. In Seam mode the
machine will weld continuously while the gun trig-
ger is depressed. Releasing the gun trigger in any
of the three modes will interrupt welding immedi-
ately.
Time Control - In Spot mode, controls spot mode
ON time between approximately .25 and 4.0 sec-
onds. In Stitch mode, controls stitch mode ON time
and OFF time simultaneously between .25 and 4.0
seconds each. This control is deactivated while in
Seam mode.
FIGURE B.1b
4
5
+
-
OPERATION
2
WELDING AMP RANGE WELDING AMP RANGE
25-125 25-125
3
SP-135 Plus

WELDING OPERATIONS

SEQUENCE OF OPERATION
Wire Loading
Refer to Figure B.2 AND B3.
The machine power switch should be turned to the
OFF ("O") position before working inside the wire feed
enclosure.
The machine is shipped from the factory ready to feed
4" (100 mm) diameter spools. A 4" (100 mm) diameter
spool is mounted directly on the 5/8" (16 mm) diame-
ter spindle that has a built-in adjustable friction brake
to prevent overrun of the spool and excess slack in
the wire. The wing nut at the end of the shaft is used
to adjust the tension on the wire spool (See B.3 on the
following page).
To use 8" (200 mm) diameter spools, the 2" (51 mm)
diameter M15445 spindle must be used. Remove the
spacer and wing nut at the end of the shaft. Insert
spindle as shown in figure B.2. Reattach spacer and
wing nut.
Note: When loading and removing the 8" Spools
make sure that the wing nut (inside the wire spool
spindle hub) is turned 90° from the wire spool spindle
locking tab. If the wing nut is positioned in line with the
locking tab, the tab cannot be depressed to load or
unload the wire spool.
Make certain the start end of the wire, which may pro-
trude through the side of the spool, does not contact
any metallic case parts.
FIGURE B.2
Wire Spool Spindle
Be sure that this stud engages
the hole in the wire spool.
Wire Spool must be pushed all the way on the spindle
so that the spindle's tab will hold it in place. The Wire
Spool must rotate clockwise when wire is dereeled.
SP-135 PLUS
B-3
Locking Tab
8" Wire Spool
To wire drive