Miller Electric 394F, OM-222 manual Operational Terms

General Terms:

Arc Adjust

Term used to represent arc length adjustments in pulse programs. Increasing Arc Adjust increases

the actual arc length. Likewise, decreasing arc adjust shortens arc length. Arc Adjust is replaced by

volts in MIG programs.

Trigger Control

Selecting Trigger Control allows activating trigger functions such as DS, TH, 4T, TDS, and TPS.

DS (Dual Schedule)

Dual Schedule allows selecting a pair of programs that can be used together.

TH (Trigger Hold)

Trigger Hold allows the operator to feed wire without continuously pressing the gun trigger. In trigger

hold mode, momentarily press gun trigger, and wire will feed until gun trigger is momentarily pressed

again.

4T

4T allows the operator to select between weld parameters and crater parameters using the gun

trigger. Crater time must be set for at least 0.2 seconds to make this function operational. If gun

trigger is released during welding, unit goes into trigger hold, then pressing and holding trigger again

causes unit to stay in crater until trigger is released and crater parameter times out.

TDS (Trigger Dual Schedule)

TDS allows the operator to select between a pair of weld programs by using the gun trigger. In TDS

mode, momentarily pressing the gun trigger allows the operator to cycle between a pair of preselected

weld programs.

TPS (Trigger Program Schedule)

TPS allows the operator to select weld programs by using the gun trigger. In TPS mode, momentarily

pressing the gun trigger allows the operator to cycle through preselected weld programs up to a total

of 8 programs.

Program

Eight active slots for selection of various processes, wire type, and parameters.

Process

A selection made for MIG, Pulse, Accu-pulse, and RMD (optional).

MIG

CV weld process with individual settings of voltage and wire speed.

Pulse

Conventional pulse program using peak, background, pulse width, frequency, and peak voltage as

factory taught data. Adaptive method is controlled by frequency adjustment.

Accu-pulse

Pulse process utilizing constant current ramps with constant voltage control of peaks and

backgrounds. Adaptive response is controlled by peak and minimum current levels. Benefits are

shorter arc lengths, better puddle control, more tolerant of tip-to-work variation, less audible noise, no

arc wandering, allows weld to fill in at toes increasing travel speed and deposition, and more tolerant

to poor fit up and gaps.

Accuspeed

CV Pulse process designed for high travel speeds. Typically used in Robotic applications. Arc is de-

signed to be tight and fast. Front panel display is ACCU − SPED.

AccuCurve

CV Pulse process using a pulse waveform with modified curves at particular locations within the wa-

veform. Has a distinguished change in arc characteristics. Front panel display is ACCU − CURV.

RMD (optional)

RMD refers to Regulated Metal Deposition. A precisely controlled short-circuit transfer. Benefits of

RMD are well suited to thin materials, improves gap filling and spatter reduction. Provides less heat

input into workpiece, minimizes distortion and allows use of larger diameter wire on thin gauge

materials.

Wire Type

Selection of wire type by alloys and classification.

Gas Type

Selection of shielding gas being used in application.

Process Set Up

Selection procedure for entering program.

Program Load

Enters selected program information into program slot.

Volts

Preset voltage in MIG mode at idle, actual voltage while welding, and 3 seconds hold value at end of

weld.

Time

Indicates time values being set for timed functions (e.g. Preflow, Postflow which are only available in

the Arc On and Analog input or the Arc On and No Analog input modes).

Arc Length

Distance from end of wire electrode to workpiece.

WFS

Term used to represent wire feed speed. In MIG mode, wire feed setting is independent of voltage

setting. In pulse, Accu-pulse, and RMD (optional) adjusting wire feed speed also increases power

level on wire electrode (one knob control).

Amps

Indicates average amperage while welding and 3 seconds hold value at end of weld.

Arc Control

Allows setting of inductance in MIG mode. In pulse and Accu-pulse mode, this adjustment changes

the arc cone by adjusting the preprogrammed factory pulse data. In RMD (optional), this control will

affect the in much the same way as inductance.

Inductance

In short circuit GMAW welding, an increase in inductance will decrease the number of short circuit

transfers per second (provided no other changes are made) and increase the arc-on time. The

increased arc-on time makes the welding puddle more fluid.

Adjust

Control knob used to change or set parameters and functions.

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