CHAPTER 6: ADVANCED WELD FUNCTIONS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
990-057
6-9
Braze - Weld Graph Run Screen
(Figure 6-17)
Weld schedule 006 is pre-programmed at the
factory for Braze operation. The HF2 Weld
Control automatically recognizes the presence of
a Manually or Air Actuated Weld Head before
the first weld is made.
Figure 6-17. Braze - Weld Graph
Run Screen
Braze - Alphanumeric Run Screen
(Figure 6-18)
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 6-18. Braze - Alphanumeric
Run Screen
ROLLSPOT (Figure 6-19)
Rollspot is a special form of seam welding.
Typically, upper and lower wheel electrodes, in
conjunction with an automatic parts feeder, are
used to make a Rollspot weld. Because of the
weld current shunting effect after the first weld,
set the Weld2 Period weld current greater than
Weld1 by a factor of 20% to 50%. Use the
larger percentage for closer spacing. Assuming
the rotational speed of the wheel is fixed, the
Weld2 Period controls the length of the spot and
the Cool Period controls the distance between
spots.
Figure 6-19. Rollspot.
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
.
Rollspot 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.
