Movement Monitoring - HEIDENHAIN iTNC 530 Service Manual

3.3.3 Movement monitoring

Movement monitoring is possible during operation both with velocity feedforward and with
following error.
During movement monitoring, the actual path traveled is compared at short intervals (several
servo cycles) with the nominal path calculated by the NC. If during this period the actual path
traveled differs from the calculated path, the blinking error message MOVEMENT MONITORING
<AXIS> A is displayed.
Analog axes:
An existing offset during a standstill may cause a potential at the analog output without any
resulting positioning movement:
Digital axes:
There is no offset.
For digital axes, in addition to the comparison of actual and nominal values, the calculated
position from the pulses of the position encoder are compared with the pulses of the speed
encoder:
If the difference is greater than the input value from MP1144.x, the error message MOVEMENT
MONITORING IN <AXIS> B appears.
MP1140.x
Input:
MP1054.x
Input:
MP1144.x
Input:
July 2010
In MP1140.x, enter a threshold from which the movement monitoring should go into effect.
In MP1140.x, enter a speed from which the movement monitoring should go into effect.
Enter in MP332.x the number of signal periods and in MP331.x the path for the number of
signal periods.
MP1054.x contains the displacement per motor revolution. A formula can also be entered.
MP1144.x contains the value for this position difference. If no position encoder is used, the
value 0 must be entered as position difference.
DANGER
If you enter the maximum value in MP1140.x or MP1144.x, no movement monitoring is
active.
Safe machine operation is not possible without movement monitoring!
Threshold above which the movement monitoring functions
Analog axes:0.030 to 10.000 [V]
Digital axes: 0.030 to 10.000 [1000 min
Distance of a motor revolution [mm or °]
Analog axes: Nonfunctional
Digital axes: A formula can be entered.
Motion monitor for position and speed
Analog axes: Nonfunctional
Digital axes: 0 to 99 999.999 [mm]
0: No monitoring
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