Miller OM-246 466B, Owner'S Manual

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OM-246 466 Page 25
SECTION 4 − OPERATION
4-1. Operational Terms
The following is a list of terms and their definitions as they apply to this interface unit:
General Terms:
Adjust
Control knob used to change or set parameters and functions.
Amps Indicates average amperage while welding and 3 seconds hold value at end of weld.
Arc Adjust Term used to represent arc length adjustments in RMD-Pro 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.
Arc Control Pressing this button will allow setting of inductance in MIG mode and sharp arc in RMD-Pro. Also, this button
allows setting dig in stick mode.
Arc Length Distance from end of wire electrode to workpiece.
Flux Cored Arc Welding Flux cored arc welding (FCAW) is a continuous electrode that is fed into the arc and depends on shielding gas
from either an external source or is generated from the decomposition of gas forming ingredients contained in
the electrode’s core.
Gas Type Selection of shielding gas being used in application.
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.
MIG CV weld process with individual settings of voltage and wire speed.
Process A selection made for MIG, Pulse, Pro-pulse, RMD-Pro, Flux Core (FCAW), Stick, and Lift-TIG.
Process Set Up Selection procedure for entering program.
Program Eight active slots for selection of various processes, wire types, and parameters.
Program Load Enters selected program information (process, wire type, gas, etc.) into program slot (1-8).
Pro-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.
Pulse Conventional pulse program using peak, background, pulse width, frequency, and peak voltage as factory
taught data. Adaptive method is controlled by frequency adjustment.
RMD-Pro RMD-Pro refers to Regulated Metal Deposition. A precisely controlled short-circuit transfer. Benefits of RMD-
Pro are well suited to root pass welding on pipe, 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.
Sharp Arc In RMD-Pro this control will affect the arc in much the same way as inductance.
Start Provides voltage/arc adjust, wire feed rate, and time value for modified arc starts [which is only adjustable with
the optional PDA with PipePro Program Management software (PipeProMgr)].
Stick Stick (SMAW) welding uses a flux covered consumable electrode that produces a shielding gas and slag to
shield the arc and molten weld puddle.
Synergic Synergic refers to the unit’s ability to use preprogrammed parameters to automatically adjust various weld
parameters at any specific wire feed speed setting.
TIG TIG (GTAW) welding uses a non − consumable tungsten electrode and shielding gas to produce a strong, clean,
high quality weld.
Volts Preset voltage in MIG mode at idle, actual voltage while welding, and 3 seconds hold value at end of weld.
Wire Type Selection of wire type by alloys and classification.
WFS Term used to represent wire feed speed. In MIG mode, wire feed setting is independent of voltage setting. In
RMD-Pro adjusting wire feed speed also increases power level on wire electrode (one knob control).