
APPENDIX
B–65152E/03
I. VIBRATIONS
211
D For a motor with a key, fix a half key (key of half the thickness of the
supplied key) in the keyway of the output shaft with a pipe or fix the
supplied key with a pulley for which the balance has been corrected.
(See 5., “Dynamic balance,” in Section 4.1, “Common Items,” in
Chapter 4, “Notes on Mounting.”)
D To measure the vibration of the motor itself, hang the motor from a wire
rope or place the motor on a rubber sheet 10 to 20 mm thick. When the
vibration of a flange mounting type motor is measured on a rubber
sheet, the motor may fall over during acceleration/deceleration. To
prevent this from occurring, support the motor as necessary.
Rubber or similar for preventing
the motor from falling over
Motor speed [min
–1
]
Amplitude of vibration
6000 8000 10000 12000 15000
1µm
0.031
(Vibra-
tion speed
[cm/sec])
0.042 0.052 0.063 0.079
2µm 0.063 0.084 0.105 0.126 0.157
3µm 0.094 0.126 0.157 0.189 0.236
4µm 0.126 0.168 0.210 0.252 0.314
5µm 0.157 0.210 0.262 0.314 0.393
6µm 0.189 0.252 0.314 0.377 0.472
7µm 0.220 0.293 0.367 0.440 0.550
8µm 0.252 0.335 0.419 0.503 0.629
9µm 0.283 0.377 0.472 0.566 0.707
10µm 0.314 0.419 0.524 0.629 0.786
I.3
NOTES ON
MEASURING
VIBRATIONS
I.4
RELATIONSHIP
BETWEEN
AMPLITUDES OF
VIBRATION AND
VIBRATION SPEEDS