
1.SYSTEM CONFIGURATION CONFIGURATIONS AND SELECTION B-65222EN/03
- 56 -
1.2 ABSOLUTE LINEAR ENCODER SYSTEM
For the FANUC Linear Motor series, motors are controlled using
feedback signals from a linear encoder. This section explains a system
in which an absolute linear encoder is used.
1.2.1 Example of Configuration
When an absolute linear encoder is used, the absolute position is
always determined. For this reason, magnetic pole sensor and position
detection circuit are not required, which are required for an
incremental linear encoder system. Consequently, the system
configuration can be made simple. Currently available absolute linear
encoders can handle a stroke of up to 3 m, however.
An example of a typical system configuration is shown below:
Power line
Thermostat line
Servo amplifier
Magnet plate Coil slider
Linear encoder
FSSB
1.2.2 Applicable Linear Encoder
An absolute linear encoder to be used for the FANUC Linear Motor
series must conform to the FANUC serial interface. If not, the
absolute linear encoder cannot be used.
The following table lists absolute linear encoders that can currently be
combined with the FANUC Linear Motor series.
Manufacturer
Manufacturer
specification
Signal pitch
(µ
µµ
µm)
Maximum
speed
(m/min)
Effective stroke
(mm)
LC191F 0.1 120 240 – 3040
HEIDENHAIN
LC491F 0.05 (0.1) * 120 70 – 2040
AT353 0.05 120 100 – 3000
Mitutoyo
AT553 0.05 120 100 – 1500
* Two models of specifications of 0.05 µm and 0.1 µm are
distributed.
NOTE
Linear encoder manufacturers are responsible for
the specifications, performance, guarantee, and
other items of their linear encoders. For details,
contact the relevant manufacturer.