HEIDENHAIN TNC 640, User Manual, Page: 737 / 948

Manual Operation and Setup | Optional safety concept (functional safety FS)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
737
Checking the axis positions
Refer to your machine manual.
This function must be adapted by your machine
manufacturer.
After switch-on the control checks whether the position of an axis
matches the position directly after switch-off. If a deviation occurs,
this axis is displayed in red on 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
The axis moves to the test position.
Once the test position has been reached, a dialog appears
asking whether the test position was approached correctly.
Confirm with the
OK
soft key if the control approached the test
position correctly, and with
END
if the control approached the
position incorrectly
If you confirmed with
OK
, you must confirm the correctness of
the test position again with the permissive key on the machine
operating panel
Repeat this procedure for all axes that you want to move to the
test position
NOTICE
Danger of collision!
The control does not automatically check whether collisions
can occur between the tool and the workpiece. Incorrect pre-
positioning or insufficient spacing between components can lead
to a risk of collision while approaching the test positions.
If necessary, move to a safe position before approaching the
test positions
Watch out for possible collisions
Refer to your machine manual.
The location of the test position is specified by your
machine tool builder.