HEIDENHAIN TNC 620 (73498x-02) - Manual (Page 448)

Manual operation and setup
14.4 Functional safety FS (option)
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TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
Checking the axis positions
This function must be adapted to the TNC by your
machine manufacturer. Refer to your machine
manual.
After switch-on the TNC checks whether the position of an axis
matches the position directly after switch-off. If a deviation occurs
this axis is displayed red in the position display. Axes that are
marked red can no longer be moved while the door is opened.
In such cases you must approach a test position for the axes in
question. Proceed as follows:
Select the
Manual Operation mode
Execute the approach with NC Start to move the axes in the
sequence shown
When the test position has been reached, the TNC asks
whether the position was approached correctly: Confirm with
the YES soft key if the TNC approached the test position
correctly, and with NO if the position was not approached
correctly
If you confirmed with YES, you must confirm the correctness
of the test position again with the permissive button on the
machine operating panel
Repeat this procedure for all axes that you want to move to the
test position
Danger of collision!
Approach the test positions in such a way that no
collision between tool and the workpiece or the
clamping devices can occur. If necessary, pre-
position the axes manually.
The location of the test position is specified by your
machine tool builder. Refer to your machine manual.