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Checking the axis positions – HEIDENHAIN TNC 640 (34059x-04) ISO programming User Manual

Page 472

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Manual operation and setup

15.4 Functional safety FS (option)

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472

TNC 640 | User's Manual for DIN/ISO Programming | 3/2014

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 OK soft key if the TNC approached the test position

correctly, and with END if the TNC approached the position

incorrectly.
If you confirmed with OK, 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.