Mitsubishi Electronics MDS-D-SVJ3 Manuel D’Utilisation

3 - 15

When the difference between static and dynamic friction is large, the friction torque changes sharply at the 

inversion of the travel direction. When the lost motion type 4 is used together with the type 2 or type 3, the 

acute change of the friction torque is compensated so that the path accuracy at the travel direction inversion 

can be enhanced.

As for the low-temperature state of the IM spindle motor, the output characteristic may deteriorate in 

comparison with the warm-up state and the acceleration/deceleration time may become long, or the load 

display during cutting may become high immediately after operation. This function performs the control 

compensation depending on the motor temperature with the thermistor built into the spindle motor and 

suppresses the output characteristic deterioration when the temperature is low. Temperature compensation 

function is not required for IPM spindle motor in principle.

1.50

1.60

1.70

1.80

1.90

2.00

2.10

2.20

2.30

2.40

2.50

100

20

40

60

80

Stator (thermistor) temperature[℃]

S

1

2

0

0

0

 A

cc

e

lera

ti

on/

de

celera

tion

 t

ime

[s]

With compensation
[Acceleration]
With compensation
[Deceleration]

Without compensation
[Acceleration]
Without compensation
[Deceleration]

Effect of suppressing

acceleration/deceleration

time fluctuation