Standstill Monitoring; Positioning Window - HEIDENHAIN iTNC 530 Service Manual

Possible causes of No claim for completeness; contact your machine manufacturer!
error for movement If possible, write your own experience!
monitoring ... B

9.3.4 Standstill Monitoring

The standstill monitoring is possible during operation both with velocity feedforward and with
following error.
If the position deviation is greater than the value defined in MP1110.x, the error message
STANDSTILL MONITORING <AXIS> is displayed. The message also appears if, while moving
to a position, an overshoot occurs that is larger than the input value in MP1110.x, or if the axis
moves in the opposite direction when beginning a positioning movement:

MP1110.x
Input:
Possible No claim for completeness; contact your machine manufacturer!
causes of error If possible, write your own experience!

9.3.5 Positioning Window

The positioning window defines the limits within which the control considers a position to have
been reached. After the position has been reached, the control begins running the next block.
The position controller can correct a disturbance inside this window without activating the
"Return to the Contour" function.

MP1030.x
Input:
Possible The NC program gets caught up in an NC block.
error
Possible No claim for completeness; contact your machine manufacturer!
causes of error If possible, write your own experience!
9 – 62
Large backlash (ball screw, gear, belt, coupling, etc.)
Belt torn
Coupling defective
Gear defective
In MP1140.x, enter a threshold from which the standstill monitoring should go into effect.
Standstill Monitoring
0.0010 to 30.0000 (mm)
Analog axes: Excessive offset (drift)
Vertical axes: Poor brake or defective weight balance
Clamped axes: Great mechanical effects during machining
The size of the positioning window is defined in MP1030.x.
Positioning Window
0.0001 to 2.0000 (mm)
Excessive static and sliding friction ("slip & stick")
Chip in the thread during tapping, thread milling or forming (The spindle "vibrates" to the left
and right without leaving the hole.)
Analog axes: Excessive drift
Digital axes: Insufficient controller adjustment (The axis "oscillates" and "vibrates" around the
positioning window.)
Missing acknowledgment of M, S, T, G, Q strobe signals (strobe acknowledgments, PLC)
HEIDENHAIN Service Manual iTNC 530