Miller Electric NT 456 CC - Manual (Page 25)

OM-2243 Page 21
SECTION 5 − OPERATION
5-1. Controls
229 450-A
1
6
7 4
8
2 3 5
1 Power Switch
.
This unit is equipped with a fan motor that
is thermostatically controlled and only
runs when cooling is needed (fan-on-de-
mand). If unit is not equipped with fan-on-
demand, fan motor runs when power is
on.
2 Voltmeter (see Section 5-2)
3 Ammeter (see Section 5-2)
4 Mode Switch
Use Mode switch to determine both process
and output On/Off control. Orange areas
highlight “contactor on” positions.
For air carbon arc cutting (CAC-A) and goug-
ing, place Mode switch in Stick position. For
best results, place Inductance/DIG control in
the maximum position.
5
Panel/Remote Control Switch
For front panel control, place switch in Panel
position, and use the V/A Adjust control to set
amperage or voltage, depending on Mode
switch selection.
For remote control, make connections to Re-
mote 14 receptacle (see Section 4-11), and
place switch in Remote position. In TIG
modes, output available through the remote
control is a percent of the V/A Adjust control
setting. Value selected on V/A Adjust control
is maximum output available through the re-
mote control. In the MIG, Pulsed MIG, and V-
Sense feeder modes, a remote control pro-
vides full range of unit output regardless of
V/A Adjust control setting. A remote control
is not functional in the Stick mode. If connec-
tion to Remote 14 receptacle is removed, and
Panel/Remote control switch remains in Re-
mote position, output is controled with the V/A
Adjust control.
6
V/A (Voltage/Amperage) Adjust Control
With Mode switch in any Stick or TIG position,
use control to adjust amperage from 5 to 500
amps. With Mode switch in a V-Sense Feeder
or MIG position, use control to adjust voltage
from 10 to 38 volts. In a Pulsed MIG mode,
wire feed speed is set with the wire feeder,
and the V/A Adjust control is used to set an
arc power that corresponds to the wire feed
speed (30-780 ipm).
7
Inductance/Dig Control
Control adjusts Dig when Stick mode is se-
lected on mode switch. When set towards
minimum, short-circuit amperage at low arc
voltage is the same as normal welding am-
perage. When set to max, control increases
short-circuit amperage at low arc voltage.
This allows the operator to use a very short
arc length without sticking the electrode. As
control is adjusted, the amount of Dig se-
lected is displayed on the amps meter as a
percentage (0 to 100%) of full range, and dig
is displayed on the volts meter.
For air carbon arc cutting (CAC-A) and goug-
ing, place Inductance/DIG control in the max-
imum position.
Control adjusts inductance when a MIG or V-
Sense Feeder mode is selected. Inductance
determines the “wetness” of the weld puddle.
As setting is increased towards maximum,
“wetness” (puddle fluidity) increases. As con-
trol is adjusted, the amount of inductance se-
lected is displayed on the amps meter as a
percentage (0 to 100%) of full range, and ind
is displayed on the volts meter.
This control is not functional when one of the
TIG modes is selected.
Change control setting to best suite
application.
.
Units without Inductance/Dig control
have Inductance/Dig factory set at 20%.
8 Pulse Program Select Switch
Use control to select one of ten programs,
each with different preset pulsing parame-
ters, including welding wire diameter and
type.