956 HEIDENHAIN Technical Manual MANUALplus 620
6.17.5 Positioning window
The parameter object CfgControllerTol is not required for:
Virtual axes (MP_axisMode = Virtual)
Axes that are for display only (MP_axisMode = Display)
If the axes have reached the positioning window after a movement, the status
is shown in NN_AxInPosition. This also applies to the status after the
machine control voltage is switched on.
The NC resets NN_AxInPosition as soon as you start a positioning movement
or traverse the reference marks.
In the Electronic Handwheel mode of operation, NN_AxInPosition for the
current handwheel axis is reset.
NN_AxInPosition is not set for contours that can be machined with constant
surface speed.
Axes in position The MANUALplus 620 reports "axis in position" (NN_AxInPosition), if
the axis is stationary for the time MP_timePosOK within the positioning
window MP_posTolerance
no axis direction key for the axis is pressed.
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. NN_AxInPosition is
reset as soon as there is a request to move an axis (NN_AxMotionRequest =
1).
Specify in MP_posTolerance the size of the positioning window.
Specify in MP_timePosOK how long the axis is to remain within the
positioning window.
The control window is monitored during positioning as concerns various
parameters. A following error is calculated from the control parameters, and
compared with the actual following error. If the deviation is greater than the
calculated value as well as the parameter value in MP_posTolerance, then the
error message [Axis] does not attain the control window is output after
20 seconds.
Settings in the configuration editor MP number
Axes
ParameterSets
[Key name of the parameter set]
CfgControllerTol
posTolerance
timePosOK
401101
401102
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