Routine Maintenance; Periodic Maintenance; Calibration Specification - Lincoln Electric Power Feed 25M Operator's Manual

POWER FEED™ 25M
SAFETY PRECAUTIONS
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.

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.
To verify the wire feed speed:
• Assemble a .045 (1.2mm) drive roll kit into the POWER
FEED™ 25M.
• Load a spool of .045 (1.2mm) electrode and thread the elec-
trode 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 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 should be
within 2% of the measured value.
WARNING
D-1
MAINTENANCE