Miller Electric Welder operating instructions Operational Terms

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:
Adaptive Pulse Welding	When the “adaptive pulse” welding process is selected, the unit will attempt to automatically regulate
	pulse frequency in order to maintain a constant arc length, regardless of change in welding wire stick-
	out.
Abk (Background Amperage)	Abk is the low weld current. Background current preheats welding wire and maintains the arc. When
	background current is too low, the arc is unstable and hard to maintain.
Apk (Peak Amperage)	Apk is the high pulse of welding current. Peak current melts the welding wire and forms a droplet. The
	droplet is forced into the weld puddle.
Vpk (Peak Voltage)	Arc voltage during peak current phase of the pulse waveform. This determines arc length during
	adaptive pulse welding.
Inductance	In short circuit GMAW welding, an increase in inductance will decrease the number of short circuit
	metal transfers per second (provided no other changes are made) and increase the arc-on time. The
	increased arc-on time makes the pool more fluid.
PPS (Pulses Per Second)	PPS, pulse rate, and frequency (Hz) are used interchangeably. A PPS or pulse rate of 60 Hz means
	60 pulses of current are produced each second.
PWms (Pulse Width in Milliseconds)	PWms is the time spent at peak current (1.2 ms is .0012 seconds). This time must be long enough to
	form a droplet of welding wire. The stiffness or fluidity of the molten weld puddle is controlled by
	PWms.
Synergic	Synergic refers to the unit’s ability to use preprogrammed pulse parameters to determine the actual
	pulse settings of Peak Amperage, Background Amperage, Pulse Frequency and Pulse Width at any
	specific wire feed speed setting.
Trim	Term used to represent arc length adjustments in pulse programs. Increasing trim increases the ac-
	tual arc length. Likewise, decreasing trim shortens arc length. Trim is replaced by volts in MIG pro-
	grams.
Setup Pendant Terms:
Card Mode	Is used to select use of the optional data card storage and retrieval capabilities.
Process Mode	Is used to select the type of process to be used, including Pulse, Adaptive Pulse, or Mig.
Sequence Mode	Is used to select and program the weld sequences which include preflow, run-in, weld, crater,
	burnback, and postflow.
Setup Screen Terms:
Access Code	NOTE: The optional Data Card is required to activate this feature. With code off, access to the setup
	displays is not restricted. With code on, the operator must know and enter the access code to access
	or change any of the setup displays.
	To use code, press Parameter Select button to enter access code. When the correct letter is entered,
	the indicator automatically moves to the next character. When the final access code letter is entered,
	the display automatically changes to the initial setup display.
Arc Start	NOTE: Do not use the Hot Start setting for .035 in (9 mm) or smaller wire. Use the Hot Start mode for
	pulse welding with 450 Ampere Inverter Model when high initial weld current is necessary to start
	large diameter welding wires. When in Hot Start, the 450 Ampere Inverter Model starts the arc in the
	CV mode and switches to CC once the arc is started. Do not use Hot Start unless using 450 Ampere
	Inverter Model.
Arc Time	Allows actual arc time up to 9,999.99 hours and weld cycles up to 999,999 to be accumulated and
	displayed on the digital display, and can be reset to zero as required.
Mig Type (Voltage	With DVC Voltage Correction On, the unit uses closed-loop control based on voltage feedback to
Correction)	maintain set voltage parameters. With DVC Voltage Correction Off, feedback from the arc is not used
	for closed-loop feedback to maintain voltage parameters. Feedback from the arc is still used for other
	functions.
Name Feature	When using the optional Data Card and turning the name feature on, programs written to the card can
	be identified by name, number, job number, etc.
Program Reset	By selecting program reset in the memory reset mode, the unit defaults to original factory program
	settings for the program last active. All other program and setup information remains the same.
Range	The interface requires that the voltage and amperage range of the welding power source be entered.
	Obtain this information from the welding power source Owner’s Manual.
Security	NOTE: The optional Data Card is required to activate this feature. Is used to limit what the operator
	can control. This includes accessing the number of the program, 1 through 8, and the range of weld-
	ing parameters within the program.
Software Screen	Selection of this function will display the software version of the unit. When talking with factory service
	personnel, this number may be required.
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