Lincoln SP 170-I, Operator'S Manual

Page: 18 / 39

B-3
B-3
OPERATION
WELDING OPERATIONS
SEQUENCE OF OPERATION
Wire Loading
Refer to Figures B.2 and B.3.
The machine power switch should be turned to the
OFF (
“ O ” ) position before working inside the wire feed
enclosure.
The welder is shipped from the factory ready to feed
8" (200 mm) diameter spools with 2.2" (56 mm) maxi-
mum width. These spools fit on a 2" (51 mm) diameter
spindle that has a built in, adjustable friction brake to
prevent overrun of the spool and excess slack in the
wire.
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.
FIGURE B.2
Load an 8 ” (200 mm) diameter spool on the wire spool
spindle shown in Figure B.2.
To use 4 ” (100 mm) diameter spools, the 2 ” (50 mm)
diameter spindle must be removed (See Figure B.3).
Remove the wing nut and spacer at the end of the
shaft and remove the outside plastic wire spool spin-
dle. The spindle can be stored in the wire feed com-
partment. A 4
” (100 mm) diameter spool is mounted
directly on the 5/8 ” (16 mm) diameter shaft and held in
place with the previously removed hardware. Also
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.3
Friction Brake Adjustment
With wire spool installed on the spindle shaft and the
wing nut loose, turn the spool by hand while slowly
tightening the wing nut until a light drag is felt. Tighten
the wing nut an additional 1/4 turn.
Note: When properly adjusted, the brake should pro-
vide only enough drag to prevent overrun of the spool
and excess slack in the wire. Too much drag may
result in wire feeding problems, and may cause pre-
mature wear of wire drive system components.
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 will rotate clock-
wise when wire is dereeled.
8 ” Wire Spool
To Wire Drive
Wire Spool Spindle
Be sure that this stud engages
the hole in the wire spool.
Wire Spindle Shaft
To Wire Drive
4" Wire Spool
Wing Nut
and Spacer
SP 170-I