ID 442426.04
243
WE KEEP THINGS MOVING
Holding brake
11
Manual SD6
11.9 Brake test
The brake test checks whether the brake can still apply the required holding
torque.
First the encoder is tested with the brake open. The brake then engages and a
test torque that can be parameterized is applied to the drive in each permitted
direction of rotation. If the drive detects movement, the brake could not apply
the required countertorque and the test has failed. The parameterizable test
torques can be entered in parameters
B304[0] max-positive torque for B300
and
B305[0] max negative torque for B300
.
Finally the encoder is tested again.
WARNING!
Danger of personal injury and material damage due to unexpected drive
movements!
The brake is released after the start of the brake test. If a brake is faulty,
movements of the drive axis could occur. During the encoder test the motor
turns at approximately 60 rpm with a maximum of 45° in both directions of
rotation.
Make certain that no damage could be caused by the movement.
Take special precautionary measures, especially in the case of gravity
loaded axes.
If the drive should not turn in one direction of rotation, restrict that direction
of rotation in
B306
.
The brake test can be used provided the following conditions are met:
The drive is operated with a motor encoder in one of the control modes
B20
=
64:SSM vector control
or
B20
=
2:ASM vector control
.
11.9.1
Torque calculation
11.9.1.1
Synchronous servo motor
Calculate the torques that must be entered in
B304[0]
and
B305[0]
for the
brake test according to the following instructions:
The following values will be required:
•
M
Bstat
static holding torque of the brake.
•
M
0
static torque
•
I
0
static current
•
I
N
nominal current of the drive controller
Information
Note that the brake test is defined for a STOBER drive (geared
motor with brake). Always make certain the technical requirements
for a third-party system have been clarified before using
Information
If you would like to perform the action and brake management
considers a brake test mandatory (fault 72), the fault must be
acknowledged before the action starts. Once you have
acknowledged the malfunction, you can continue with the
perform
brake test
instruction.
Information
Note that the motor torque is limited to the values in
C03 max
positive torque
and
C05 max negative torque
. If higher values are
entered in
B304[0]
and
B305[0]
, it will not be possible to reach
them. Check in
E65 actual positive T-max
und
E66 actual negative
T-max
whether other torque limits are still active.
