Download Notices on the User Manual

Operation Evta AC Servo Driver- User Manual
Figure 8-4 Wiring Diagram in the Application of Band-type Release Signal Controlling Band-type Motor
Motors with different powers require different band-type brakes. When selecting 24V switch power, user shall
refer to the technical parameters of brakes for different motors as shown in the table below.
Motor frame No.
Rated torque (N.m)
Power voltage (V)
Brake coil power (20℃,W)
110
4
24VDC
20
0.037
130
8
24VDC
25
0.042
180
32
24VDC
40
0.135
Table
Release time (s)
8-19 Technical Parameters of Brakes for Different Motors
Confirm connection is correct, keep all input signals OFF, connect power and then set the required parameter.
In the consideration of the sequence relationship between COIN signals, if the machine or work platform
moves a little under gravity, please make time adjustment by the following parameters relevant to band-type
brake action.
Parameter
Name
Unit
Parameter range
Default
Applicable mode
PA47
Brake time constant 1
2ms
0～1000
0
P，S
PA48
Brake time constant 2
2ms
0～1000
0
P，S
PA49
Brake time constant 3
2ms
0～1000
0
P，S
Table
8-20 Relevant Parameter Adjustment
Three conditions to cause the sudden turnoff of servo unit and corresponding solutions are as shown below:
Case 1: Servo unit turns off suddenly when motor moving as shown in Figure 8-5.
When drive unit is moving at high-speed, it cannot make band-type brake suddenly, or else it may damage
brake. It is necessary to start band-type brake release signal COIN at proper time. Rational adjustment of PA47
can enable motor to decelerate first and then make band-type brake. PA47 shall be set according to the
practical mechanical action.
Figure 8-5 Sudden Turnoff of Servo Unit When Motor Moving
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