CHAPTER 4: OPERATING INSTRUCTIONS
UB25 LINEAR DC RESISTANCE WELDING CONTROL
990-665
4-9
Section V. Programming For Active Part Conditioning
Before
you program for Active Part Conditioning, make sure you are familiar with these procedures
described in this manual:
•
Chapter 3, Using UB25 Welding And Monitoring Functions
•
Chapter 4, Section III, Programming Weld Schedules
•
Chapter 4, Section IV, Programming The Weld Monitor
1
Press the
SCHEDULE
button, then select a Weld Schedule using
either
the
▲▼
arrows
or
the numeric keypad.
2
Program a single pulse for
Constant Power
operation. Program the power level and weld time
to cause slight sticking between the two parts. Make a few welds and pull them apart. Increase
or decrease the power setting until a light tack weld is achieved.
4
Push the
ENERGY
button to monitor the waveforms for
voltage
,
resistance
,
current
,
and
power
.
5
Push the voltage
V
key and observe the high peak of the voltage waveform.
5
Push the
Ω
MONITOR
(resistance)
key and observe the resistance waveform. This should
appear to begin high, then start to drop as a tack weld is made and oxides are removed.
5
Push the current
kA
(current) key and observe the current waveform starting to rise as the
oxidization breaks down. If the current waveform starts to flatten, this is an indication
that the resistance has stabilized and the parts have come into closer contact.
6
Push
RUN
and optimize the energy and time setting of Pulse 1 (constant power) to
provide an adequate tack weld and also a current waveform (view in the monitor screen)
that has started to flatten out, but is still rising. This indicates that a full melt has not yet
occurred.
7
Push the
ENERGY
button to
switch to
MONITOR
mode.
Program an upper current limit
on the
MONITOR
screen.
NOTE
: You can toggle between
peak and average readings by
pressing the
PEAK/AVERAGE
button.
