Lincoln Electric IM10180 POWER FEED 25M NNS - Manual (Page 50)

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ACCESSORIES POWER FEED™ 25M NNS
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
• Check weld cables, control cables and gas hoses
for cuts.
• Clean and tighten all weld terminals.
PERIODIC MAINTENANCE
• Motor Brushes:
Inspect the motor brushes every 6 months or every
2.5 million arc starts (whichever comes first).
Replace the brushes if they are less than 0.5” (12.7
mm) long.
CALIBRATION SPECIFICATION
All calibrations are factory set on the POWER FEED™
25M NNS.
To verify the wire feed speed:
• Assemble a .045 (1.2mm) drive roll kit into the
POWER FEED™ 25M NNS.
• 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 POWER FEED™
25M NNS 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 with a calibrated volt
meter.
• The displayed voltage on the POWER FEED™ 25M
NNS should be within 2% of the measured value.