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6. CHARACTERISTICS
L max =
60
Vo
t1 t2
2
t3
................................................................................................... (6.1)
Where,
L max : Maximum coasting distance [mm]
Vo: Machine's fast feed speed [mm/min]
t
1
: Delay time of control section [s]
t
2
: Braking delay time of brake (Note) [s]
t
3
:Braking time [s]
9.55 10
4
(TL 0.8TB)
(J
L
J
L
) No
t
3
JL : Load inertia moment converted into equivalent [kg cm
2
]
value on servo motor shaft
JM : Servo motor inertia moment [kg
cm
2
]
No : Servo motor speed during fast feed [r/min]
T
L : Load torque converted into equivalent [N m]
value on servo motor shaft
T
B : Brake static friction torque (Note) [N m]
Note. t
2
and TB are the values noted in Table 6.1 Characteristics. JL is the machine's inertia moment at the servo motor shaft.
6.2 Vibration rank
The vibration rank of the servo motor is V-10 at the rated speed. Measure vibration in the following
position with the servo motor installed as shown below.
Top
Bottom
Servo motor
Measuring position
Servo Motor Vibration
Measuring Conditions