CHAPTER 6: ADVANCED WELD FUNCTIONS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
6-10
990-057
When Rollspot is used with a Non-Force Fired Air Actuated Weld Head, the Squeeze (SQZ) Period
must be used to allow sufficient time for the electrodes to close and apply the required weld force to the
parts before the Weld Period begins. Weld current begins when the Squeeze Period ends and both levels
of a two-level Foot Switch are closed.
Rollspot welding continues for as long as all switches remain closed. Hold has no meaning with
Manually Actuated Weld Heads and does not appear on either the weld schedule Program or Run
screens.
Rollspot - Weld Graph Run Screen
(Figure 6-20)
Weld schedule 007 is pre-programmed at the
factory for Rollspot operation. The HF2 Weld
Control automatically recognizes the presence of
a Manually or Air Actuated Weld Head before
the first weld is made.
Figure 6-20. Rollspot -
Weld Graph Run Screen
Rollspot - Alphanumeric Run Screen
(Figure 6-21)
To simultaneously view all pre-programmed
time periods and energy settings, press [CHNG]
to select the Alphanumeric Run screen. The 7
digit Weld Counter is displayed in the upper
right corner.
Figure 6-21. Rollspot -
Weld Graph Run Screen
SEAM (Figure 6-22)
Seam can be used to make automated hermetic
seam welds using automatic feeders, and PLC or
host computer control. Seam can also be used to
make manual or semi-automatic non-hermetic
seam welds using an operator.
CAUTION:
It is easy to exceed the duty cycle
rating for the HF2 Weld Transformer using the
Rollspot weld function. Refer to
Chapter 2, HF2
Weld Transformer Electrical Specifications.
Figure 6-22. Seam
