YASKAWA SGM-A3 - Page 126

3.4 Setting Stop Mode
113
5) 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-40) or alarm oc-
currence during motor rotation.
Since brakes for SGM/SGMP Servomotors are
designed as holding brakes, if brake is applied at
motor running, brake generates excessive fric-
tion. Therefore, brake ON timing when the motor
stops must be appropriate. Adjust the user
constant settings while observing machine opera-
tion.
•
Conditions for TGON
+ signal (1CN-27) output
during motor operation. The circuit between
1CN-27 and 1CN-28 is opened in either of the
following situations.
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-40) or
alarm
occurrence
and main
power OFF
Servo ON
Servo OFF
Motor speed
(r/min)
Stop by dynamic
brake or coasting
to a stop (Cn-01
bit 6)
BRKSPD
(Cn-15)
TGON
+ output
(1CN-27)
Release
brake
Apply brake
BRKW AI
(Cn-16)
When this time elapses, TGON+ signal is
output.