Lincoln Electric IM664 Multi-Weld 350 Arc Converter - Manual (Page 16)

B-2 OPERATION B-2
Average Amps for about 7 seconds after welding
stops in CC and CV modes .
• The 7 second memory display is indicated by
the displayʼs left-most decimal point blinking,
and is interrupted if arc is restarted.
Accuracy of Actual Amps is within 3%, and typi-
cally within 10 amps of Preset.
• An Actual Amps meter calibration adjustment
trimmer is provided. (See MAINTENANCE sec-
tion).
Two front screws secure the meter bezel which
holds a replaceable spatter shield lens (Lincoln
part no. T14807-9).
(4) VOLTS Digital Meter is a 3-1/2 digit LED meter
which displays:
Preset Volts in CV mode when not welding.
"Blank" in CC mode when not welding.
Actual Volts while welding in both CV and CC
modes.
Average Volts for about 7 seconds after welding
stops in CV and CC modes .
• The 7 second memory display is indicated by
the displayʼs left-most decimal point blinking,
and is interrupted if arc is restarted.
Accuracy of Actual Volts is within 3%, and typical-
ly within 1 volt of Preset.
• An Actual Amps meter calibration adjustment
trimmer is provided. (See MAINTENANCE
section).
Two front screws secure the meter bezel which
holds a replaceable spatter shield lens.
(5) Thermal Shutdown (yellow) Light turns on if out-
put is shutdown because internal overheating has
occurred. (See OVER TEMPERATURE SHUT-
DOWN in this section).
(6) Input Voltage (green) Light indicates appropriate
level of input supply voltage:
"On" for adequate input voltage over 50v for CC
or CV mode.
"Off" for inadequate input voltage under 50V, no
input or Power Switch OFF.
Note: If green light is "blinking" the input voltage may
be drifting above and below the 50V level due to loads
on supply and cables.
RECESSED PANEL CONTROLS
These instruments are recessed behind a screw
secured hinged cover panel, and are not typically
required for normal operator access. They may be left
covered, as factory set, or setup as desired with or
without the hinged cover secured:
(7) Hot Start Control is provided to enhance arc start-
ing in both CC and CV modes with an extra output
"boost" at the arc strike that returns to the setting
level in less than a second (about 0.30 sec. in CC
mode, and 0.045 sec. in CV mode). This extra Hot
Start amplitude is adjustable from "0" (no extra) to
"10" (100% of setting extra), with the factory set "5"
(center) position typically good for most weld start-
ing.
(8) Arc Force Control in the CC mode with
Stick/Gouge slope.(See below). Arc Force prevents
"stubbing" of the electrode by providing extra weld
current if the arc voltage drops below about 14V.
This extra weld current is adjustable from "-10" (no
extra) to "+10" (60% of setting extra), with the fac-
tory set "0" (center) position typically good for most
welding.
In CV mode this control functions like an induct-
ance (or “pinch”) control to provide a “softer” less
penetrating arc when set toward “+10”, or a
“harsher” more penetrating arc when set toward
“-10”.
(9) CC Slope Switch is provided to enhance stick
welding on "fast-freeze" type electrodes (such as
E6010 and E7010) typically used on pipe welding
applications for fast root pass vertical down "drag"
technique (not "whipping"). If using this type of
application improved operating appeal may be
obtained if the CC Slope is switched from the fac-
tory set STICK / GOUGE position to the PIPE
position.
Note: The PIPE position uses a "drooping" type slope
(~22v/100A), so preset current (not actual cur-
rent) accuracy may be affected if arc length
voltage is not maintained at the typical 28V
used for these electrodes. Typically this error
should not be more than about 10 A.
(10) Remote Control Receptacle is provided to per-
mit the use of an optional Remote output control
to provide operator control even closer to the arc.
Connecting the Remoteʼs plug to this receptacle
automatically transfers output control from the
panel Output Control (item (2) above) to the
Remote pot control, which will function the same,
but with only single-turn resolution.
MULTI-WELD 350