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APPX
Appendix 1 Component List of the RD77MS
Mounting of serial absolute synchronous encoder
This section describes precautions for handling the serial absolute synchronous encoder.
• 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 bellows coupling.
Ensure that excessive force (greater than the permitted shaft load) is not applied to the shaft of serial absolute synchronous
encoder.
• 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.
Item
Radial direction
Thrust direction
Permitted shaft load
Up to 19.6 N
Up to 9.8 N
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 bellows coupling.
• Never hit the end of the serial absolute synchronous encoder shaft with a hammer when connecting the bellows 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
).
• Do not use rigid couplings. Doing so applies an excessive bending load to the axis, and may break the axis of the servo motor or cause deterioration of the
bearings.
Serial absolute
synchronous encoder
Bellows
coupling
Bearing
Gear
