DCM00044 REV. 14 55
5.2 Physical Description
Refer to Chapter 4: Installation and Setup for dimensional information.
5.2.1 Standard Items
Slide Mechanism
The slide system is based on a precision roller bearing slide which provides precise
alignment of the anvil, smooth linear motion and long term reliability.
Mechanical Stops
The Ultraweld L20 Actuator has two mechanical stops to limit the horn travel: the down
stop and the up stop.
The down stop is used as a safety to prevent contact between the Horn and Anvil if the
welder is cycled without the part(s) to be welded.
The up stop is used to limit the upward travel of the horn. Two examples for the use of the
up stop are limiting the upward travel to quicken cycle times and for easier loading and
unloading of components.
Polar Shell & Ultrasonic Stack
The converter-booster-horn assembly, or ultrasonic stack, is supported in a steel polar
shell by means of two diaphragm springs. The diaphragm springs are mounted at either
end of the booster and are securely bolted to the polar shell. The diaphragm shaped
springs are made from titanium and are acoustically tuned at the 20 kHz operating
frequency. This system permits efficient transmission of ultrasonic vibration along the axis
of the ultrasonic stack while providing rigid mounting.
Linear Encoder
The linear encoder measures the distance traveled by the horn. Depending on the weld
mode settings, it can:
• Weld in height mode
• Weld in energy with height compensation
• Inspect the height of the parts to be joined (pre-height)
• Inspect the height of the parts after being welded (height)
Tool Support
The Ultraweld L20 tool support allows for quick tooling installation by means of a dovetail
mounting design.
Pneumatic System
The pneumatic system is contained within the actuator’s enclosure. Refer to Figure 5.1.
The system consists of:
1. A cooling solenoid valve.
2. A horn solenoid valve.
3. A pressure regulator.
4. A quick exhaust valve.
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