1.2.1 Carnage and Slide System
The carriage is driven by a double-acting air cylinder, mounted on a
linear, ball-bearing slide. The slide system is based on eight sets of
preloaded, permanently lubricated bearings. These provide consistent,
precise alignment of the horn, smooth linear motion, and long-term
reliability.
1.2.2 Pneumatic System
The pneumatic system consists of a solenoid valve, an air cylinder, and a
PRESSURE REGULATOR with an air-pressure gauge. The carriage's rate of
descent is adjusted by the DOWN SPEED control on the welder's front
panel. The rate of ascent is fixed.
As the carriage travels up and down, cooling air from the exhaust air of
the solenoid valve is directed through the carriage to the converter.
1.2.3 Power Supply
The power supply consists of an ultrasonic power supply module which
converts 50/60 Hz line current to 20 kHz electrical energy and a module
with
System Protection Monitor
and
AutoTune
(SPM/AT) features.
The SPM/AT ensures maximum reliability by terminating ultrasonic energy
if the welder is operated under adverse conditions. This protects both the
power supply and other welder components. Conditions that activate the
SPM/AT include the following:
•
excessive pressure, leading to an overload;
•
improper, loose or failed horn, booster, or converter;
•
improper manual tuning;
•
electronic failure within the power supply; and,
•
harness or wiring failures between the power supply and the
ultrasonic converter.
The SPM/AT enables the power supply to track and compensate for
changes in horn frequency, if necessary. These changes may occur due to
increased temperatures, wear on the horn face, or material buildup on the
horn.
Introduction
1-4
900M+
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