HEIDENHAIN iTNC 530 Service Manual page 71

Automatic test of After switching on the drive, but before traversing the reference mark, you can carry out an
the motor brakes at automated functional test of the motor brake. For the period of one second, a current is output
switch-on while the brake is applied. The path that the axis has moved is then measured. If the permissible
path is exceeded, the error message 8130 Motor brake defective <axis> appears, and the axis
remains controlled. The test is carried out simultaneously for all affected axes.
If no motor current flows while testing the motor brakes, the error message 8140 No current
for brake test <axis>.

The I0 standstill current is used as motor current entered in the motor table. If I0 = 0 in the
motor table, the rated current I-N from the motor table is used.
Recommended input value for MP2230.x:
M
M
Always keep in mind:

Enter MP2232.x < MP1110.x so that the standstill monitoring does not respond!
Recommended input value for MP2232.x:
a: Permissible brake angle: Backlash of motor brake according to instructions by the
manufacturer (for HEIDENHAIN motors a ≤ 1°)
May 2006
DANGER
If the machine were switched off in case of an error, vertical axes could fall down!
This could lead to damage to property or persons!
In case of an error, the axis must be moved to a safe position, and physically supported,
if necessary. Only then may the machine be switched off so that the defect can be
corrected!
MP2230.x contains a factor for the motor current with which the test of the motor brake
should be performed. MP2230.x = 0 if the test is not to be performed or for motors without
brakes.
M
≥ ⋅ L
------- -
MP2230.x 1.3
M
0
: Maximum torque of the axis
L
: Standstill torque of the motor
0
Torque for motor test ≥ 1.3 ⋅ Maximum torque of the axis
Standstill torque of the motor ≥ Maximum torque of the axis
Holding torque of the motor brake ≥ Torque for motor test
MP2232.x contains the permissible path that the motor is allowed to move against the brake.
MP2232.x = 0 if the test is not to be performed or for motors without brakes.
MP1054.x
2 α ⋅ ⋅
------------------------ -
MP2232.x =
360°
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