Miller Electric NT 456 CV, NT 456 CC manual Operation, Controls

	SECTION 5 − OPERATION
5-1.	Controls
	2	3	6	5
	8

4 7 1 229 450-A

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.

2Voltmeter (see Section 5-2)

3Ammeter (see Section 5-2)

4Mode 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.

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