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CHAPTER 4: INTRODUCTION TO FEEDBACK MODES AND MONITORING
HF28 DC RESISTANCE WELDING SYSTEM
990-372 4-3
Section II. Weld Monitoring
Introduction
The Control's feedback sensors not only control weld energy output, but they can also be used to
monitor each weld. The Control's
MONITOR
features allow you to view graphic representations of
welds, visually compare programmed welds to actual welds, look at peak or average energy values, set
upper and lower limits for welds, and vary the time periods for these limits during the weld pulse. These
limits can be used for several purposes. Common uses for
out-of-limits
welds are to stop a weld, or to
trigger a relay to remove parts with bad welds from the production line. These functions are accessed
using the
MONITOR
buttons on the front panel. To use these functions, see Chapter 5, Operating
Instructions .
PEAK and AVERAGE MONITORING
The Control is always monitoring both the
PEAK
and
AVERAGE
of current, voltage,
power, and resistance at the same time. When you press the
PEAK
↔
AVERAGE
key,
the top line in the LCD simply toggles back and forth so you can view either
PEAK
or
AVERAGE
values whenever you choose.