Maxsine EP3 AC Series, User Manual

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Chapter 4 Running
112
4.14 Electromagnetic holding brake
The electromagnetic brake (holding brake, lost power brake) is used in locking the vertical or
the inclined worktable of machine tool, which connected with the servomotor. When the power
supply lost or SON is OFF, prevent the worktable from fall and break. Realizes this function,
must select and purchase the servomotor with electromagnetic brake. The brake only can use for
holding the worktable and cannot use for decelerating and or stopping machine movement.
4.14.1 Parameters of electromagnetic holding brake
The parameters related to the electromagnetic brake:
Para
meter
Name Range
Default
value
Unit Usage
P165
Speed check point for servomotor
is near standstill
0
～
1000 5 r/min ALL
P166
Delay time for electromagnetic
brake when servomotor is in
standstill
0
～
2000 0 ms ALL
P167
Waiting time for electromagnetic
brake when servomotor is in
motion
0
～
2000 500 ms ALL
P168
Action speed for electromagnetic
brake when servomotor is in
motion
0
～
3000 100 r/min ALL
4.14.2 Make use of electromagnetic holding brake
The chart below is the brake wiring diagram, the brake release signal BRK of the servo
driver connect to the relay coil, the contact of relay connect brake coil and DC supply. The brake
power supply has enough capacity provided by the user. Suggested installs the surge absorber to
suppress surge voltage caused by switching off the relay. The diode also makes the surge absorber,
but must pay attention to that the action of the brake has a little lagging.
Under the speed of the servomotor is smaller than parameter P165, if the SON becomes
OFF. By now, the servomotor will continue to excitation for holding the position, after the period
set by parameter P166 removes the excitation from the servomotor.
Under the servomotor is in motion (The speed is bigger than P165) if the SON becomes
OFF, by now the excitation is removed from the servomotor, after delay period of time the brake
becomes active. During the delay time, the servomotor decelerates from the high speed down to