MOMENT WEIGHT SCALES
BASIC MACHINE OPERATING CONCEPT
A turbine blade is mounted on one end of a balance beam
and a counterweight which offsets the moment of the holding fixture ("adapter")
is mounted on the other side. The blade is then inserted in the adapter. A force
transducer determines the moment.
Most Manufacturers use a knife edge and load cell to measure moment.
This results in poor accuracy and reliability
Machines manufactured by Space Electronics use crossed-web flexure pivots and force
restoration technology, resulting in an instrument which is at least 10 times more accurate than
other methods and is also more resistant to damage in a production environment. In our scale,
a laser detects a shift due to blade moment and a feedback circuit applies an electromagnetic force
to counteract the deflection. The current applied is converted to a measurement of force. Our
pivot consists of strips of spring steel which are oriented to create a single center of rotation.
We do not use knife edges, because they are not capable of the 0.000,050 inch pivot accuracy
required.
Space Electronics MW Series of Moment Weight Scales use unique technology
resulting in accuracy 10 times better than traditional methods.
MORE INFORMATION
Main Moment Weight Scale Page
Single Axis Moment Weight Scales
Three Axis Moment Weight Scales
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