D-1
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
forcuts.
•Cleanandtightenallweldterminals.
PERIODIC MAINTENANCE
•MotorBrushes:
Inspectthemotorbrushesevery6monthsorevery
2.5 million arc starts (whichever comes first).
Replacethebrushesiftheyarelessthan0.5”(12.7
mm)long.
CALIBRATION SPECIFICATION
All calibrations are factory set on the POWER FEED™
25MNNS.
Toverifythewirefeedspeed:
•Assemble a .045 (1.2mm) drive roll kit into the
POWERFEED™25MNNS.
•Loadaspoolof.045(1.2mm)electrodeandthread
theelectrodethroughthewiredrive.
•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
speedtachometer.
•Themeasuredwirefeedspeedshouldbewithin2%
ofthesetvalue.
Toverifythevoltagedisplay:
•SettheweldingpowersourceandPOWERFEED™
25M NNS to a CV procedure that gives steady
"spray"transferinthearc.
•While a weld is being made, measure the voltage
from the feed plate to work with a calibrated volt
meter.
•ThedisplayedvoltageonthePOWERFEED™25M
NNSshouldbewithin2%ofthemeasuredvalue.