MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
990-057
6-1
CHAPTER 6
ADVANCED WELD FUNCTIONS
Weld Functions
A weld function is a unique heat profile created by weld current, voltage, or power that is applied over a
fixed time period, to resistance weld different parts. Welding applications requiring the use of
specialized weld functions include: (a) parts plated with cadmium, tin, zinc, or nickel; b) parts with
heavy oxide coatings such as aluminum; (c) parts that are round or not flat; or (d) parts made of
refractory metals such as molybdenum or tungsten.
The HF2 Weld Control is shipped with ten pre-programmed weld functions that are saved in Weld
Schedules 001 through 010. While these factory pre-programmed weld functions do not contain
sufficient weld time or weld energy for most welding applications, they are a useful starting point to
begin welding. Please note that WELD/REPEAT will only work with Air Actuated Weld Heads. The
table below lists each Weld Function and its general application.
Weld Function
Pre-Prog
Schedule
Typical Application
BASIC WELD
001
Make single spot welds on simple flat parts without plating.
WELD/REPEAT
002
Make multiple semi-automatic spot welds using an operator.
QUENCH/TEMPER
003
Spot weld flat or round parts that have minimum plating thickness.
PRE/POSTHEAT
004
Forge weld heavily oxidized or refractory parts such as molybdenum or tungsten.
UP/DOWNSLOPE
005
Weld round parts, parts that are not flat, spring steel parts, or heavily plated or
oxidized parts such as aluminum.
BRAZE
006
Reflow two parts together using a braze material.
ROLLSPOT
007
Make automated multiple weld spots using automatic feeders and PLC or host
computer.
SEAM
008
Make automated hermetic seam welds using automatic feeders, and PLC or host
computer control.
Make manual or semi-automatic non-hermetic seam welds using an operator.
DUAL PULSE
009
Use for best control of miniature and small parts spot welding with or without
plating.
PULSATION
010
Use only for spot welding simple parts where the total weld energy or weld time
required to make an acceptable weld using any other Weld Function is marginal.
Using the Pulsation Weld Function can damage the crystal structure of the parts.
