APPLICATIONS OF Σ-SERIES PRODUCTS
3.4.4 Using Holding Brakecont.
110
4) Set the following user constants to adjust brake ON timing so that holding brake is applied
when the motor stops.
Cn-15
BRKSPD
Speed Level at which
Brake Signal Is Output
during Motor Operation
Unit:
r/min
Setting
Range:
0to
Maximum
Speed
Factory
Setting:
100
For
Speed/Torque
Control and
Position
Control
Cn-16
BRKWAI
Output Timing of Brake
Signal during Motor
Operation
Unit:
10 ms
Setting
Range: 10
to 100
Factory
Setting:
50
For
Speed/Torque
Control and
Position
Control
Cn-15 and Cn-16 are used for SGM/SGMP Ser-
vomotors with brake. Use these user constants to
set brake timing used when the servo is turned
OFF by input signal S-ON (1CN-14) or alarm oc-
currence during motor rotation.
Brakes for SGM/SGMP Servomotors are de-
signed as holding brakes. Therefore, brake ON
timing when the motor stops must be appropriate.
Adjust the user constant settings while observing
machine operation.
• Conditions for BK signal (1CN-7) output during
motor operation. The circuit between 1CN-7 and
1CN-10 is opened in either of the following situa-
tions.
1 Motor speed drops below the value set in Cn-15 (BRKSPD) after servo OFF occurs.
2 The time set in Cn-16 (BRKWAI) has elapsed since servo OFF occurred.
3
Brake Timing when Motor is in Stopped Status
Power OFF
by S-ON input
(1CN-14) or
alarm
occurrence
Servo ON
Servo OFF
Motor speed
(r/min)
Stop by dynamic
brake or coasting
to a stop (Cn-01
bit 6)
BRKSPD
(Cn-15)
BK
output
(1CN-7)
Release
brake
Apply brake
BRKWAI
(Cn-16)
When this time elapses, BK signal is output.
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