July 2013 6.11 Monitoring functions 927
Always keep in mind:
Torque for motor test ≥ 1.3 ⋅ maximum load torque of the axis
Stall torque of the motor ≥ maximum load torque of the axis
Holding torque of the motor brake ≥ torque for the motor test
Enter in MP2232.x the permissible path that the motor is allowed to move
against the brake. If the test is not to be carried out, or for motors without
brakes, enter MP2232.x = 0.
The TNC monitors the maximum path during the brake test (MP2232.x)
based on the information from the speed encoder (motor encoder).
MP2232.x must be < MP1110.x so that the standstill monitoring does not
activate!
Recommended input value for MP2232.x:
α: Permissible braking angle: Backlash of the motor brake as per the
manufacturer specifications (for HEIDENHAIN motors, α ≤ 1°)
Example:
QSY 155B-EcoDyn: M
0
= 13 Nm, M
Br
= 40 Nm
M
L
= 11 Nm
MP1054.x (distance per motor revolution) = 20 [mm]
α = 1°
MP2230.x Multiplier for motor current during test of motor brake
Input: 0.100 to 30.000 [· motor stall current]
0: No test of motor brakes, or motor without brake. The inverter
brake output is controlled nevertheless.
Recommended: 1.3 · M
L
/ M
0
MP2232.x Maximum permissible path during test of motor brakes
Input: 0 to 10.0000 [mm] or [°]
Please note that when reading the current via the internal oscilloscope,
on the CC 6xxx you are seeing the effective value of the current.
Please note that the test torque can only be generated with a certain
factor of uncertainty. Factors of influence here are the accuracy of the
current sensors and the torque constant of the motor.
MP2232.x 2 α
MP1054.x
360°
--------------------------------
⋅⋅=
MP2230.x 1,3
11 Nm
13 Nm
---------------------
⋅≥ 1,1=
MP2232.x 2 1°
20 mm
360°
----------------------
⋅⋅ 0,111 mm==
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