CHAPTER 6: ADVANCED WELD FUNCTIONS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
990-057
6-11
Seam can be used with Unitek Peco Force Fired Manual or Air Actuated Weld Heads. For Manually
Actuated Weld Heads, weld current begins when the Force Firing Switch closes. For Force Fired Air
Actuated Weld Heads, weld current begins when both levels of a two-level Foot Switch are closed and
the Force Firing Switch in the Air Actuated Weld Head closes.
When Seam 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. Weld Current flows as long as all switches remain closed.
Hold Period has no meaning with Manually Actuated Weld Heads and does not appear on either the
weld schedule Program or Run screens.
Seam - Weld Graph Run Screen
(Figure 6-23)
Weld schedule 008 is pre-programmed at the
factory for Seam operation. The HF2 Weld
Control automatically recognizes the presence of
a Manually or Air Actuated Weld Head before
the first weld is made.
Figure 6-23. Seam
Weld Graph Run Screen
Seam - Alphanumeric Run Screen
(Figure 6-24)
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 6-24. Seam
Alphanumeric Run Screen
