Connecting To Mechanical Systems; Water And Drip Resistance - Omron SMARTSTEP R7D-AP Series User Manual

System Design and Installation

Connecting to Mechanical Systems

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• The axial loads for Servomotors are specified in 2-
4-2 Performance Specifications. If an axial load
greater than that specified is applied to a Servo-
motor, it will reduce the service life of the motor
bearings and may damage the motor shaft.
• When connecting to a load, use couplings that
can sufficiently absorb mechanical eccentricity
and variation.
• For spur gears, an extremely large radial load may
be applied depending on the gear precision. Use
spur gears with a high degree of accuracy (for
example, JIS class 2: normal line pitch error of
6 µ m max. for a pitch circle diameter of 50 mm). If
the gear precision is not adequate, allow backlash
to ensure that no radial load is placed on the
motor shaft.
• Bevel gears will cause a load to be applied in the
thrust direction depending on the structural preci-
sion, the gear precision,
changes. Provide appropriate backlash or take
other measures to ensure that no thrust load is
applied which exceeds specifications.
• Do not put rubber packing on the flange surface. If
the flange is mounted with rubber packing, the
motor flange may separate due to the tightening
strength.
• When connecting to a V-belt or timing belt, consult the maker for belt selection and tension. A radial
load twice the belt tension will be placed on the motor shaft. Do not allow a radial load exceeding
specifications to be placed on the motor shaft due to belt tension. If an excessive radial load is
applied, the motor shaft may be damaged. Set up the structure so that the radial load can be
adjusted. A large radial load may also be applied as a result of belt vibration. Attach a brace and
adjust Servo Driver gain so that belt vibration is minimized.

Water and Drip Resistance

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The enclosure ratings for the Servomotors are as follows:
3,000-r/min Cylinder-style Servomotors (30 to 750 W): IP55 (except for through-shaft parts)
3,000-r/min Flat-style Servomotors (100 W to 750 kW): IP55 (except for through-shaft parts)
and temperature
Pulley
Belt
Tension
Servomotor shaft
center line
Backlash
Make moveable.
Pulley for tension adjustment
(Make adjustable.)
Chapter 3
Ball screw center line
Shaft core displacement
Adjust backlash by
adjusting the distance
between shafts.
Bevel gear
3-5