Gap (G): The distance from
surface of the encoder to the
surface of codewheel or
codestrip.
Radial and Tangential Mis-
alignment Error (ER, ET): For
rotary motion, mechanical dis-
placement in the radial and
tangential directions relative to
the nominal alignment.
Specular Reflectance (Rf): The
amount of incident light reflected
by a surface. Quantified in terms
of the percentage of incident
Angular Misalignment Error
(EA): Angular displacement of
light. A spectrometer can be used the encoder relative to the
to measure specular reflectance
of a surface (contact factory for
more information).
tangential line.
C
ALL FOUR STATES (S1 TO S4)
ARE MAINTAINED.
P
CH. A
CH. B
φ
S1
S2
S3
S4
AMPLITUDE
CODEWHEEL ROTATION OR LINEAR MOVEMENT
RADIAL (E )
R
ANGULAR (E )
A
TANGENTIAL (E )
T
AEDR-8300
AEDR-8300
SHAFT
SHAFT
CODEWHEEL
CODEWHEEL
3
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
