Laurel Electronics Laureate Quadrature Encoder Position & Rate Meter - Manual (Page 4)

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4
Application Examples
Using Quadrature for Cutting to Length
Controlling the repetitive cutting of material to length is
an excellent application of the Laureate quadrature
meter.
The quadrature encoder shares the shaft of a sensing
wheel, whose rotation corresponds to lineal
displacement of material. The meter compares the
displacement reading against setpoint information, and
then uses its dual relays to first slow down and then cut
the material.
Using Quadrature for X-Y Positioning
Accurate X-Y position or rate can be obtained from two
shaft encoders, which convert linear position to
quadrature signals as a shaft turns. In addition to serving
as a display, each Laureate can use its optional dual
relay setpoint capability for closed loop control. It can
also transmit data via RS-232, RS-485, or a 4-20 mA
analog signal.
Using Quadrature to Monitor a Drilling Operation
Quadrature can be used to track position and vertical
drilling speed of the bit in an oil drilling operation. A shaft
encoder is rotated by a cable that moves with the drilling
shaft.
In this application, the same encoder signal is applied to
a Laureate quadrature meter for position, and to a
second quadrature meter for rate. Both meters can be
scaled to read out in appropriate engineering units, such
as feet and inches per minute, and can be alarmed. A
Laureate 6-digit remote display could be added to read
out peak rate.