Section 4 − Operation; Controls (350 Lx Nameplates Shown) - Miller Syncrowave 250 DX Manuel De L'utilisateur

4-1. Controls (350 LX Nameplates Shown)

A. For 200/230/460 Volts And Non CE Units
1 2
10
9
.
Top row of lights in upper left corner are
On for SMAW. Bottom row are On for
GTAW.
Green on nameplate indicates a TIG function,
Gray indicates a Stick function.
1 Process Control
See Section 4-3.
2 Amperage Control
See Section 4-4.
3 Output Control
See Section 4-5.
4 Start Mode Control
See Section 4-9.
5 Voltmeter And Ammeter
Voltmeter displays average voltage (to the
nearest 0.1 V) at the weld output terminals.
Use meter to preset amperage. Meter dis-
plays average weld amperage output of unit
to nearest ampere when welding.
NOTE: Meters are self-calibrating. No adjust-
SECTION 4 − OPERATION
3 4 5
7
ment available.
6 Amperage Adjustment
Control
Use control to adjust amperage, and preset
amperage on ammeter. This control may be
adjusted while welding.
For remote amperage control, front panel
control setting is the maximum amperage
available. For example: If front panel control
is set to 200 amps, the range of the remote
amperage control is 3 to 200 amps for 250 DX
models, and 3 to 200 amps for 350 LX
models.
For pulse welding, use Amperage Adjust
control to select from 3-300 amps of peak am-
perage for 250 DX models, or 3−400 amps of
peak amperage for 350 LX models (see Sec-
tion 4-12).
For spot welding, use Amperage Adjust
control to select from 3-310 amps for 250 DX
models, or 3−400 amps for 350 LX models
(see Section 4-16).
7 Output Selector Switch
See Section 4-2.
11
6
8
8 Power Switch
Use switch to turn unit Off and On.
9 Postflow Time Control
Use control to set length of time (0−50 sec-
onds) gas flows after welding stops. It is im-
portant to set enough time to allow gas to flow
until after the tungsten and weld puddle has
cooled down.
Application:
Postflow is required to cool the tungsten and
weld, and to prevent contamination of tung-
sten and weld. Increase postflow time if tung-
sten or weld are dark in appearance (approxi-
mately 1 second per 10 ampere of welding
current).
10 Balance/DIG Control
See Section 4-10.
11 Pulser Controls (Optional on 250 DX
model)
See Section 4-12.
12 Sequence Controls (Optional)
See Section 4-13.
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