SMC Networks LECSB Series, Руководство по эксплуатации

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15. SERVO MOTOR
15 - 4
15.1.2 Characteristics of servo motor with a lock
CAUTION
The lock is provided to prevent a drop at a power failure or servo alarm
occurrence during vertical drive or to hold a shaft at a stop. Do not use it for
normal braking (including braking at servo-lock).
Before performing the operation, be sure to confirm that the lock operates
properly.
The operation time of the lock differs depending on the power supply circuit you
use. Be sure to check the operation delay time with a real machine.
The characteristics (reference value) of the lock provided for the servo motor with a lock are indicated
below.
Servo motor
Item
LE-
□
-B
S5
(50W)
S6
(100W)
S7
(200W)
S8
(400W)
Type (Note 1) Spring actuated type safety lock
Rated voltage (Note 4) 24 V DC
0
-10%
Power consumption [W] at 20 °C 6.3 7.9
Coil resistance (Note 6)
[Ω]
91.0 73.0
Inductance (Note 6) [H] 0.15 0.18
Lock static friction torque [N•m] 0.32 1.3
Release delay time (Note 2) [s] 0.03 0.03
Locking delay time (Note 2)
[s] DC off
0.01 0.02
Permissible locking work
Per locking [J] 5.6 22
Per hour [J] 56 220
Lock looseness at servo motor shaft (Note 5) [degrees] 2.5 1.2
Lock life (Note 3)
Number of lockings
[times]
20000
Work per locking [J] 5.6 22
Selection example of surge absorbers
to be used
(Note 7, 8)
For the suppressed
voltage 145 V
TND20V-680KB (135[V])
For the suppressed
voltage 370 V
TND10V-221KB (360[V])
Note 1. There is no manual release mechanism. When it is necessary to hand-turn the servo motor shaft for machine
centering, etc., use a separate 24 V DC power supply to release the lock electrically.
2. The value for initial on gap at 20 °C.
3. The lock gap will increase as the brake lining wears, but the gap is not adjustable.
The lock life indicated is the number of locking cycles after which adjustment will be required.
4. Always prepare a power supply exclusively used for the lock.
5. These are design values. These are not guaranteed values.
6. These are measured values. These are not guaranteed values.
7. Select the lock control relay properly, considering the characteristics of the lock and surge absorber. When you use a
diode for a surge absorber, the locking time will be longer.
8. Manufactured by Nippon Chemi-Con Corporation.