22
Coupling
Measure this distance at four different
positions on the circumference.
The difference between the maximum and
minimum measurements must be 0.03 mm or less.
Alignment Accuracy
Note: When measuring the difference, turn
the motor and the coupling together.
Servomotor Model
SJME-
Allowable
Radial Load
N
Distance
from Flange
mm
Allowable Thrust Load
N
Direction A or B
01A
02A
04A
08A
78
245
245
392
54
74
74
147
20
25
25
35
Allowable Thrust Load
Distance from Flange
Allowable Radial Load
A
A
A
Perpendicularity between the flange face and output shaft
Run-out at the end of the shaft
Matching concentricity of the flange
A
B
Installation
Installation
Design the mechanical system so that, during operation, the thrust and radial loads applied to the servomotor
shaft do not exceed the range shown in the table below.
The following diagram shows tolerances for the servomotor's output shaft and installation area.
0.03 mm
0.08 mm
0.06 dia. mm
Coupling to the Machine
Allowable Loads
Mechanical Tolerance T IR (Total Indicator Reading)
Observe the following precautions when coupling the servomotor with the drive axis of the machine.
• Align the shaft of the servomotor with the shaft of the equipment, and then couple the shafts.
• Make sure that the motor and the machine are accurately aligned.
Failure to observe this caution may result in damage to the motor axis or deterioration of the standard life of
the servomotor by an eccentric load. Keep the eccentric load as small as possible.
• A metal disk coupling designed for servomotors is recommended to maintain the response characteristics
and durability of the servomotor.
• When attaching the coupling to the shaft of the servomotor, do not hammer the axis or near the encoder.
Such shocks and vibrations may cause the encoder to malfunction.
