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4 Characteristics
MITSUBISHI CNC
4 - 4
4-1-4 Machine accuracy
Machine accuracy of the servo motor's output shaft and around the installation part is as below.
(Excluding special products)
1. Use a flexible coupling when connecting with a ball screw, etc., and keep the shaft core deviation
to below the tolerable radial load of the shaft.
2. When directly installing the gear on the motor shaft, the radial load increases as the diameter of the
gear decreases. This should be carefully considered when designing the machine.
3. When directly installing the pulley on the motor shaft, carefully consider so that the radial load
(double the tension) generated from the timing belt tension is less than the values shown in the
table above.
4. In machines where thrust loads such as a worm gear are applied, carefully consider providing
separate bearings, etc., on the machine side so that loads exceeding the tolerable thrust loads are
not applied to the motor.
Accuracy (mm)
Measurement
point
Flange size [mm]
Less than 100 100 SQ., 130 SQ. 176 SQ. - 250 SQ. 280 or over
Amplitude of the flange surface to the
output shaft
a 0.05 0.06 0.08 0.08
Amplitude of the flange surface's fitting
outer diameter
b 0.04 0.04 0.06 0.08
Amplitude of the output shaft end c 0.02 0.02 0.03 0.03
CAUTION
a
c
b