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BRK-OFF Signal
• See Timing Chart describing the timing of issuing BRK-OFF signal, e.g.
torelease the brake after power-on, and activate the brake in case a servo-off/
alarm occurs during the operation of the motor.
•
The timing (delay) of deactivating BRK-OFF signal (i.e. activating the brake) after the
motoris freed into a non-excited status in case of Servo-OFF or alarm event can be adjusted
by using Pr6B (brake output delay time set-up at motor in motion). For details, see Details
of Parameters.
<Notes>
1. The brake may produce a sound (rattling of brake liner). This is not a problem.
2. When energizing the brake coil (when the brake is off), magnetic flux may leak from theend
of the axis. If a magnetic sensor or similar device is used near the motor, make sure that
the device is not affected by the magnetic flux.
Holding Brake Specifications
Motor
Capacity
Static
(W)
friction
torque
(N•m)
MUMS 30 ~ 100
0.29 or
more
200, 400
1.27 or
more
2.45 or
750
more
Excitation voltage should be 24VDC ±10%
*1) Delay of DC cutoff in case a surge absorber is used.
( ) means actual values using a diode "V03C" made by HITACHI SEMCON DEVICE Co., Ltd.
The values in this table are representative (except the friction torque, releasing voltage and
excitation voltage). The backlash of the brake is factory-set to within ±1 degree.
Dynamic Brake (DB)
The amplifier has a dynamic brake for emergency use. Observe the following precautions.
Inertia
Absorption
Releasing
Å|4
x 10
time
time
(kg•m
(ms)
(ms) *1
2
)
0.003
25 or less
20 or
0.03
50 or less
15 or
0.09
60 or less
(100)
- App. 9 -
Excitation
Releasing
current
voltage
(DC
current
(A))
(during
cooling)
0.26
1VDC or
less
more
0.36
(30)
less
0.43
Allowable
Allowable
thermal
overall
equivalent
thermal
of work
equivalent
per
of
3
braking
work(x10
(J)
J)
39.2
4.9
137
44.1
196
147
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