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OM-222 394 Page 15
SECTION 5 − OPERATION
5-1. Operational Terms
The following is a list of terms and their definitions as they apply to the interface unit in the wire feeder:
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.