HEIDENHAIN TNC 335 Technical Manual - Manual (Page 169)

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TNC 360 3 Servo Positioning of the NC Axes 8/95
3.5.5 Standstill monitoring
The Standstill monitoring functions in operation with feed forward control and with lag. The
monitoring functions when the axes have reached the positioning window. The range in which the
axes may move is defined in MP1110.
As soon as position deviation is greater than the value which is stored in MP1110, the flashing error
message
"Gross positioning error D"
is displayed. The message also appears if, on running-in to a position, an overshoot occurs which is
larger than the value in MP1110 or the axis moves in the opposite direction on beginning a
positioning movement.
MP1110 Standstill monitoring
Input range: 0.001 to 30 [mm]
3.5.6 Positioning window
The positioning window defines the limits within which the control considers that a position has
been reached. After reaching the position the control starts the execution of the next block.
The size of the positioning window is defined in machine parameter MP1030.
If the value which is entered is too small, the run-in time and therefore the time between one
program block and the next will be lengthened.
If the axes have reached the positioning window after a movement, the markers M2008 to M2011
and M2017 are set (see section "Axis in position").
MP1030
MP1030.0
Positioning window
Input range 0.001 to 2 [mm] or [°]
X axis
MP1030.1 Y axis
MP1030.2 Z axis
MP1030.3 4th axis