CKD AX Series Instruction Manual page 25

2
INSTALLATION
(2) Use of Optional Electromagnetic Brake
➀ The optional electromagnetic brake of AX4000 Series requires a response time
between about 150 and 250msec. (Refer to Table 14.6.)
The traveling time requires a settling time between 50 and 200msec for settling at
the target position in addition to the programmed traveling time. Take these times
into consideration when examining the mechanical timing.
For the recommended circuit with an electromagnetic brake, refer to Chapter 3.
"SYSTEM CONFIGURATION AND WIRING."
CAUTION:
(3) For a System Equipped with an External Braking Mechanism
To use an external brake or to forcibly restrict the output axis of the actuator, use an NC
code ("M68": Brake application, "M69": Brake release) in the NC program in the stopped
state (execute "M68" in the stopped state, or execute "M69" before start of a travel).
These NC codes turn on or off the integral loop of the servo system besides brake
control, and they avoid overloads of the actuator. As well, oscillation may be caused if
the external brake is not rigid enough. Use a rigid brake.
For details, refer to Chapter 3. "SYSTEM CONFIGURATION AND WIRING" and
Chapter 8. "APPLICATION EXAMPLES."
[SMB-14E]
Discontinue
The optional electromagnetic brake is to increase the
retention force of the stopped output axis. Do not use it
to decelerate or stop a rotating output axis.
To pass a shaft through the hollow hole of the model
equipped with an electromagnetic brake, use a
non-magnetic material (such as SUS303).
If a magnetic material (such as S45C) is used, the
shaft will be magnetized, causing stuck iron powder on
the equipment or giving magnetic effects on peripheral
devices.
Note that the magnetic force of the electromagnetic
brake may cause stuck iron powder or effects on
measuring instruments, sensors or other devices.
Due to the timing issue of the brake, position deviation
may result. Apply the brake after the output axis is
stopped completely.
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