Lincoln Electric IM733 LN-15 WIRE FEEDER - Manual (Page 23)

D-1 MAINTENANCE D-1
LN-15 ACROSS THE ARC MODEL
ELECTRIC SHOCK can kill.
• Do not operate with covers
removed.
• Turn off power source before
installing or servicing.
• Do not touch electrically hot
parts.
• Turn the input power to the welding power
source off at the fuse box before working in the
terminal strip.
• Only qualified personnel should install, use or
service this equipment.
WARNING
SAFETY PRECAUTIONS
ROUTINE MAINTENANCE
Routine maintenance consists of periodically blowing
out the machine, using a low pressure airstream, to
remove accumulated dust and dirt from inside the
feeder.
PERIODIC MAINTENANCE
• Replace the drive rolls and inner wire guide when
they are worn.
• Replace the pig tail if the insulation is cut, abraded
or damaged.
CALIBRATION SPECIFICATION
All calibration is factory set on the LN-15.
To verify the wire feed speed:
• Assemble a .045 (1.2mm) drive roll kit into the LN-
15.
• Load a spool of .045 (1.2mm) electrode and thread
the electrode through the wire drive.
• Adjust the wire feed speed to 300 in/min
(7.62m/min).
• Press the COLD FEED switch and measure the
actual wire feed speed with a calibrated wire feed
speed tachometer.
• The measured wire feed speed should be within 2%
of the set value.
To verify the voltage display:
• Set the welding power source and LN-15 to a CV
procedure that gives steady "spray" transfer in the
arc.
• While a weld is being made, measure the voltage
from the feed plate to work.
• The displayed voltage on the LN-15 should be with-
in 2% of the measured value.