18 100-412-234 REV. 06
2.1.4 The 2000Xc Actuator
The 2000Xc Actuator is a compact, rigid unit designed for use in manual, semi-automated,
and automated ultrasonic welding systems. The actuator can be mounted directly on an I-
beam (or similar machine frame), or it can be mounted on a column and base with start
switches and used in a manual or benchtop system. The actuator is designed to be
operated in an upright position, but is capable of running horizontally or inverted. If you
are mounting your equipment in an inverted position, contact Branson for further
recommendations. (See 1.3 Warranty Statement, Disclaimer).
The 2000Xc Actuator requires a 2000Xc Power Supply for power and control of the
actuator’s operation and to provide ultrasonic power to the converter in the actuator.
The 2000Xc Actuator is designed with full, built-in pneumatic controls, and mechanical
controls. Operation of the 2000Xc Power Supply is controlled by inputs to the 2000Xc
Power Supply.
S-Beam Load Cell and Dynamic Follow-Through
Many welding applications require force to be built up on the part before ultrasonic energy
is activated. To achieve this, the actuator contains an S-Beam load cell, located between
the air cylinder and the converter, which initiates (triggers) ultrasonics after a preset force
is applied to the part. Dynamic follow-through maintains a consistent force on the part
during the weld collapse. This system helps provide uniform weld quality.
The dynamic triggering and follow-through process operates as follows: upon activation of
the operating cycle, the solenoid valve delivers regulated air to the upper portion of the
cylinder, and exhausts air through the Downspeed control from the bottom of the cylinder,
causing the horn to advance and contact the workpiece. When the load cell measurement
of the force on the part indicates part contact, and the desired trigger force is reached, a
signal is sent to the power supply, which then starts the weld cycle. At this time, the
actuator locks into a cycle, timing begins, and the palm buttons can be released. As
melting of the plastic occurs, the load cell dynamic follow through maintains consistent
force on the part, ensuring smooth, efficient transmission of ultrasonic energy into the
part.
The Carriage and Slide System
The 2000Xc Actuator’s carriage is driven by a double-acting air cylinder. It is mounted on
a linear ball-bearing slide. The slide system is based on eight sets of preloaded,
permanently lubricated bearings and provides consistent, precise alignment of the horn,
smooth linear motion, and long-term reliability.
Encoder
The encoder measures the distance the horn has traveled. Depending on the power supply
settings, it can:
• Allow for distance welding in absolute and collapse modes
• Detect improper setup controls
• Monitor the distance data of the weld
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