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Synopsis: A Linear Scale is used to provide a feedback of
the displacement of any axis on a machine. The linear scale
consists of two parts i.e. a) Scale which consists of a Glass or
metallic plate with gratings on it, enclosed in a extruded
channel usually made of aluminum. b) Scanner, which generates
electrical signals when there is a displacement between the
scale and scanner.
The scanner consists of signal processing electronics, which
conditions the pulses generated for further processing by a CNC
or other control and display electronics. Usually the scanner
has all the electric connections and there is no connection to
the scale.
Two ways of Fixing a Scale to a Slide: Whenever a
scale/scanner combination is fixed to a linear slide, one of
them is connected to a moving part, and the other to the
stationary base of the slide.
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