Mechanical Tolerance - YASKAWA SGDH User Manual

3 Specifications and Dimensional Drawings

3.8.2 Mechanical Tolerance

Handling Oil
and Water
Cable Stress
Connectors
1. Before starting installation, thoroughly remove the anticorrosive paint that coats the end of the motor
IMPORTANT
2. Vibration from improper alignment of shafts will damage the bearings.
3. Do not allow direct impact to be applied to the shafts when installing the coupling as the encoder
3.8.2 Mechanical Tolerance
The following table shows tolerances for the servomotor's output shaft and installation area. For more details on
tolerances, refer to the dimensional drawing of the individual servomotor.
Tolerance T. I. R. (Total Indicator Reading)
Perpendicularity between the flange face and
A
output shaft: 0.04
B Mating concentricity of the flange O.D.: 0.04
C Run-out at the end of the shaft: 0.02
Flange
Through shaft section:
This refers to the gap where
the shaft protrudes from
the end of the motor.
Shaft
Make sure there are no bends or tension on the power lines.
Especially be careful to wire signal line cables so that they are not subject to stress because the core
wires are very thin at only 0.2 to 0.3 mm (0.0079 to 0.012 in).
Observe the following precautions:
• Make sure there is no foreign matters such as dust and metal chips in the connector before connect-
ing.
• When the connectors are connected to the motor, be sure to connect the end of servomotor main cir-
cuit cables before connecting the encoder cable's end.
If the encoder cable's end is connected first, the encoder may be damaged because of the voltage dif-
ferences between FGs.
• Make sure of the pin arrangement.
• Do not apply shock to resin connectors. Otherwise, they may be damaged.
• When handling a servomotor with its cables connected, hold the servomotor or the connectors.
Otherwise, the cables will be damaged.
• When bending cables are used, wiring must be performed so that excessive stress will not be applied
to the connector section. Failure to observe this caution may damage the connector.
shaft.
Anticorrosive
paint is
coated here.
mounted on the opposite end of the shaft may be damaged.
If the servomotor is used in a location that is subject to water
drops, make sure of the servomotor protective specifications
(except for through shaft section).
If the servomotor is used in a location that is subject to water
or oil mist, use a servomotor with an oil seal to seal the
through shaft section.
Precautions on Using Servomotor With Oil Seal
• The oil surface must be under the oil seal lip.
• Use an oil seal in favorably lubricated condition.
• When using a servomotor with its shaft pointed upward, be
sure that oil will not stay in the oil seal lips.
Reference Diagram
3-44