user manual

2-65
1
Before Using the Products
2
Preparation
3
Connection
4
Setup
5
Adjustment
6
When in Trouble
7
Supplement
2
Preparation
11. Built-in Holding Brake
Outline
In the applications where the motor drives the vertical axis, this brake would be used to
hold and prevent the work (moving load) from falling by gravity while the power to the
servo is shut off.
Caution
Use this built-in brake for "Holding" purpose only, that is to hold
the stalling status. Never use this for "Brake" purpose to stop the
load in motion.
Connecting Example
The following shows the example when the brake is controlled by using the brake release
output signal (BRK-OFF) of the driver.
Note
Caution
1. The brake coil has no polarity.
2. Power supply for the brake to be provided by customer. Do not co-use the power sup-
ply for the brake and for the control signals (VDC).
3. Install a surge absorber as the above Fig. shows to suppress surge voltage gener-
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from the brake release to brake engagement is slower than that of the case of using a
surge absorber.
4. For a surge absorber, refer to P.7-124, "Recommended Components" of Supplement.
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Reactance of the cable varies depending on the cable length, and it might generate
surge voltage.
Select a surge absorber so that relay coil voltage (max. rating : 30V, 50mA) and termi-
nal voltage may not exceed the rating.
Output Timing of BRK-OFF Signal
Note
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while the motor is in motion, refer to P.2-61, "Timing Chart".
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motion), you can set up a time between when the motor enters to a free-run from en-
ergized status and when BRK-OFF signal turns off (brake will be engaged), when the
Servo-OFF or alarm occurs while the motor is in motion.
1. The lining sound of the brake (chattering and etc.) might be generated while running
the motor with built-in brake, however this does not affect any functionality.
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gized (brake is open). Pay an extra attention when magnetic sensors are used nearby
the motor.
Driver
Surge
absorber
Relays to be shut off
at emergency stop
Motor
Brake coil
BRK-OFF+
11
10
41
RY
BRK-OFF–
V
DC
RY
12 to 24V
Power supply
for brake
DC24V
COM–
Connector X4
Fuse
(10A)