Instruction manual

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4 INSTALLATION AND WIRING
4.4 Mounting of Serial Absolute Synchronous Encoder
This section describes precautions for handling the serial absolute synchronous
encoder.
(1) If the serial absolute synchronous encoder is linked to a chain, timing belt, or
gears, the machine rotating shaft should be supported by a separate bearing
and connected to serial absolute synchronous encoder through a coupling. Ensure
that excessive force (greater than the permitted shaft load) is not applied to the
shaft of serial absolute synchronous encoder.
Table 4.1 Permitted Shaft Loads
Gear
Coupling
Radial direction
Thrust direction
Up to 19.6N
Up to 9.8N
Permitted shaft load
Bearing
Serial absolute
synchronous encoder
(2) Excessive load is applied to the shaft of serial absolute synchronous encoder by
the large mounting errors in eccentricity and angle of deviation. As a result, it
might damage the machine or shorten extremely the life.
Minimize loads applied to the shaft such that they make within the permitted shaft
load range.
CAUTION
The serial absolute synchronous encoder contains a glass disk and precision mechanism. Take
care when handling it. The encoder performance may deteriorate if it is dropped or subjected to
shocks or vibration exceeding the prescribed limits.
Do not connect the shaft of serial absolute synchronous encoder directly to machine side rotary
shaft. Always after connecting the shaft of
serial absolute synchronous encoder to another bearing
once, connect the shaft through a flexible coupling.
Never hit the end of the serial absolute synchronous encoder coupling shaft with a hammer when
connecting the coupling to it. The large loads applied to
serial absolute synchronous encoder will
damage it.
The serial absolute synchronous encoder uses optical parts. Mount it in an atmosphere where there
are extremely few water drops and little oil and dust.
In any place where the serial absolute synchronous encoder is exposed to water and/or oil, provide
protection from oil and water, e.g. mount a cover. In addition, run the cable downward to prevent oil
and/or water from running on the cable into the
serial absolute synchronous encoder. When it is
inevitable to mount the
serial absolute synchronous encoder vertically or obliquely, trap for the
cable.
Use the serial absolute synchronous encoder within the specified temperature range (-5 to 55°C
(23 to 131°F)).