YASKAWA SGM series User Manual page 121

APPLICATIONS OF Σ-SERIES PRODUCTS
3.4.4 Using Holding Brake cont.
3
110
4) Set the following user constants to adjust brake ON timing so that holding brake is applied
when the motor stops.
Speed Level at which
Brake Signal Is Output
Cn-15 BRKSPD during Motor Operation
Output Timing of Brake
Signal during Motor
Cn-16 BRKWAI Operation
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.
Unit: Setting Factory
r/min Range: Setting:
0 to 100
Maximum
Speed
Unit: Setting Factory
10 ms Range: 10 Setting:
to 100 50
Brake Timing when Motor is in Stopped Status
Power OFF
Servo ON
by S-ON input
(1CN-14) or
alarm
occurrence
Motor speed
(r/min)
BRKSPD
(Cn-15)
BK output
Release
(1CN-7)
brake
When this time elapses, BK signal is output.
For
Speed/Torque
Control and
Position
Control
For
Speed/Torque
Control and
Position
Control
Servo OFF
Stop by dynamic
brake or coasting
to a stop (Cn-01
bit 6)
Apply brake
BRKWAI
(Cn-16)