Emerson 2000IW Maintenance Manual page 26

An enclosure housing the carriage and slide system, the pneumatic system, the power
supply and the control module. The Control Module consists of a control board and a
keyboard/display board.
A linear optical encoder provides detailed weld distance information, IW+ only.
2.2.1 Carriage 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.
2.2.2 Pneumatic System
The pneumatic system consists of a solenoid valve, and 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.
2.2.3 Power Supply Module
The Power Supply Module converts conventional 50/60 Hz line current ultrasonic energy at
the resonant frequency of your Converter-Booster-Horn Stack. The Module Controller
ensures maximum reliability by terminating ultrasonic energy if the welder is operated
under adverse conditions. This protects both the power supply module and other welder
components. The controller also tracks and compensates 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.
2.2.4 Control Module
The Control Module consists of a Controller board and a keyboard/display board. It
controls the power supply module and the welder's pneumatic functions. The keyboard/
display board allows the user to change parameters via the front panel displays and
switches.
2.2.5 Linear Optical Encoder, a 2000IW+ only feature.
The Linear Optical Encoder is a sensing device that tracks carriage movement. The
resolution of the encoder is 0.0001 in / 0.0025 mm.
NOTICE
Information from the linear optical encoder is used:
• To determine the relative position of the carriage at any point during the weld cycle
• To terminate the weld by absolute distance, the total distance the carriage travels from an upper
limit position (ULS) to a preset lower limit position
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The linear optical encoder reading will vary from the actual distance
the carriage travels by no more that 1/4 in / 6 mm, due to the setting
of the Upper Limit Switch (ULS). This distance is consistent from
cycle to cycle.
1019567 REV. 03