Mounting Of Serial Absolute Synchronous Encoder - Mitsubishi Electric Q170MSCPU User Manual

4 INSTALLATION AND WIRING

4.3 Mounting of Serial Absolute Synchronous Encoder

Gear
Bearing
The serial absolute synchronous encoder contains a glass disk and precision mechanism. Take
care when handling it. Encoder function may be impaired if it is dropped or subjected to shocks or
vibrations exceeding the prescribed limits.
Do not connect the shaft of the serial absolute synchronous encoder directly to the machine side
rotary shaft. The shaft should be supported by a separate bearing and mounted using a flexible
coupling.
Never hit the end of the serial absolute synchronous encoder coupling shaft with a hammer or
similar object when doing things such as connecting a coupling to it. Excessive shock applied to
the serial absolute synchronous encoder may damage it.
The serial absolute synchronous encoder uses optical parts. Mount it in an atmosphere
containing as little moisture, oil, and dust as possible.
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 traveling on the cable into the serial absolute synchronous encoder.
When it is necessary to mount the serial absolute synchronous encoder vertically or obliquely, set
up a trap on the cable.
Use the serial absolute synchronous encoder within the specified temperature range (-5 to 55°C
(23 to 131°F)).
This section describes precautions for handling the serial absolute synchronous
encoder.
(1) If the serial absolute synchronous encoder is linked to a chain, a timing belt, or
gears, the machine side rotary shaft should be supported by a separate bearing
and connected to the serial absolute synchronous encoder through a coupling.
Ensure that excessive force (greater than the permitted shaft load) is not applied
to the shaft of the serial absolute synchronous encoder.
Serial absolute
synchronous encoder
Coupling
(2) Excessive load applied to the shaft of serial absolute synchronous encoder by
large mounting errors in eccentricity or angle of deviation may impair encoder
function or extremely shorten encoder life. Minimize loads applied to the shaft so
that they remain within the permitted shaft load range.
Table 4.1 Permitted Shaft Loads
Permitted shaft load
CAUTION
4 - 26
Radial direction Thrust direction
Up to 19.6N Up to 9.8N