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INTRODUCTION
Super High-Precision
Encoders and Optimum Control T
echnology (LQ Control)
Lead to the Development of a Super High-Precision
Rotary-Type Positioning System
Canon has now developed a compact, super high-precision
laser rotary encoder using semiconductor laser and
integrated a motor unit directly. The result is a
new high-precision positioning control system. That
obtains a sinusoidal wave with 81,000 periods per
revolution from the laser rotary encoder and digitally
divides it into 4096 parts. This achieves a resolution
of 0.0039 angle-seconds. By connecting our system
controller equipped with optimum control, higher precision
can be attained in positioning.
FEATURES
- By motor encoder and optimum control
(LQ control), the unit achieves high steady speed,
high resolution, high precision, and high stationary
stability.
- With the use of an encoder, unlike
laser-based instruments, the wavelength is unaffected
by temperature, air pressure, humidity, and other
similar factors; hence, it is superior in environment
resistance.
- Canon has developed its own built-in
type high precision laser encoders, enabling the
system to be smaller yet more precise.
- By connecting the unit with system
controller SC- 01H/PC, the system can be made even
smaller with lower costs.
APPLICATION
EXAMPLE
Servo Track Writer When a HDD (Hard
Disc Drive) is just assembled, its magnetic disc contains
no standard data or information, so it is necessary
to record track information (equivalent to the groves
on compact discs) magnetically for each HDD.
Such HDDs, without any standards,
require that the R/W head be forced to move to certain
positions with high precision. Canon’s rotary positioners
play a crucial role as they carry out this positioning
of R/W head with high precision. factors; hence, it
is superior in environment resistance.
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