CHAPTER 6: ADVANCED WELD FUNCTIONS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
6-2
990-057
BASIC WELD (Figure 6-1)
Basic Weld is a term used by the industry to
describe the simplest heat profile used in the
majority of resistance spot welding applications.
Use Basic Weld to make single spot welds on flat
parts that do not have any plating or heavy oxides.
Basic Weld 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.
Figure 6-1. Basic Weld
When Basic Weld 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.
When Basic Weld is used with any type of Air Actuated Weld Head, the Hold Period can be used to
automatically keep the electrodes closed on the parts after weld current has terminated for the purpose of
providing additional heat sinking or parts cooling. Squeeze and Hold Periods have no meaning with
Manually Actuated Weld Heads and do not appear on either the weld schedule Program or Run screens.
Basic Weld - Weld Graph Run Screen
(Figure 6-2)
Weld Schedule 001 is pre-programmed at the
factory for Basic Weld operation. The HF2
Weld Control automatically recognizes the
presence of a Manually or Air Actuated Weld
Head before the first weld is made.
Basic Weld - Alphanumeric Run Screen
(Figure 6-3)
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.
