CHAPTER 2: GENERAL SETUP
2 KHZ INVERTER WEDLING POWER SUPPLY
2-4
990-057
HF2 Welding System Maximum Secondary Loop Resistance
To use the Power Supply and HF2 Welding Transformer system to its maximum capability, the Maximum
Secondary Loop Resistance must
not
exceed the values listed in the preceding table. Exceeding these
maximums will produce a
FEEDBACK RANGE EXCEEDED
alarm.
HF2 Maximum Secondary Loop Resistance Measurement (Figure 2-4)
1
Connect a four terminal micro-
ohmmeter as shown in Figure 2-4.
2
Put the parts to be welded between the
electrodes.
3
Measure the total loop resistance which
includes both Weld Cables, Weld Head,
Electrodes, and parts.
4
If the total loop resistance exceeds the
table value, use:
A)
Larger diameter Weld Cables
B)
Shorter length Weld Cables, or
Figure 2-4. Secondary
Resistance Measurement
C)
Copper Bus Bars to connect the HF2 Welding Transformer to the Weld Head. If these
suggestions do not work, then a different Welding Transformer Model may be required.
CAUTION:
For product safety, the system power cable and all inter-unit cabling should be as short as
possible, and be dressed so that all cables stay separated.
HF2 Welding Power Supply to HF2 Welding Transformer Connections (Figure 2-5)
The Power Supply must always be connected to
the Transformer as shown in Figure 2-5,
regardless of what Weld Head System is used.
1
Connect the Power Supply
POWER
Cable to the line voltage source as
specified in
Chapter 2, Power Line
Voltage, Current, and Wire Size
Requirements.
2
Connect the Power Supply
OUTPUT
Cable to the matching connector on the
Transformer.
3
Connect the Power Supply
SENSING
PORT
Cable to the matching connector
on the Transformer.
