Amada HF-2500A, Operation Manual, Page: 52 / 164

CHAPTER 3: SYSTEM CONFIGURATION
HF-2500A HIGH FREQUENCY WELD CONTROL
3-20 990-371
Weld Head Applicability
The weld functions can be used with AMADA WELD TECH force fired, manual weld heads; air actuated
weld heads; or SL-300A Weld Heads.
SQUEEZE TIME
is used to allow sufficient time for the electrodes
to close and apply the required weld force to the parts before the weld current begins. Weld current begins
when the squeeze period ends.
When the weld functions are 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 to provide
additional heat sinking or parts cooling.
NOTES:
•
AMADA WELD TECH - SL-300A Electronic Force Controlled Weld Heads: The
SQUEEZE
TIME
is controlled by the weld head, not the Power Supply.
SQUEEZE TIME
begins when the
force-firing switch closes, therefore you will set the Power Supply
SQUEEZE TIME
to zero and
set the
DEBOUNCE TIME
to zero.
•
Air-Actuated Weld Heads: For force fired, air actuated weld heads,
SQUEEZE TIME
begins
when both levels of a two-level foot switch are closed and the force firing switch in the air
actuated weld head closes.
•
Manual Weld Heads: For manually actuated weld heads,
SQUEEZE TIME
begins when the
force-firing switch closes. Using
SQUEEZE TIME
is optional, depending on the welding process
you have developed.
When To Use Functions
To ensure accurate, consistent welds, the Power Supply delivers extremely precise pulses of energy to the
weld head. Each pulse is comprised of weld-time and weld-energy (
voltage , current , or power ) values
pre-programmed by the user. The Power Supply is a closed-loop welding control using internal and
external sensors to measure the weld-energy delivered to the weld head. Weld-energy feedback instantly
goes to the Power Supplies logic circuits that actively correct the pulse to compensate for any variation in
part resistance. The Power Supply also has several monitor functions that give you remarkable control
over the welding and production process. Together, these features ensure precise, consistent welds, higher
productivity, a lower rejection rate, and longer electrode life.
Before operating the Power Supply, it is important to know how to match the Power Supplies capabilities
to specific weld applications. This section provides Weld details in the following order:
•
Weld Schedules
−
Single-Pulse
−
Upslope/Downslope
−
Dual-Pulse
Chapter 5, Operating Instructions , contains the step-by-step instructions on how to program each of the
functions above.