HEIDENHAIN TNC 370 User Manual page 328

12 Tables, Overviews and Dialogs
12.5 TNC Error Messages
Pre-position the touch probe so that the stylus cannot be deflected
before it reaches the RANGE.
Enter a TIME LIMIT that is appropriate to the 3D surface to be scanned
(CONTOUR LINES cycle).
l
The stylus must not be deflected before it reaches the RANGE.
l
The stylus must be deflected somewhere within the RANGE.
Enter calibrated touch probe axis in the RANGE cycle.
12-22
TNC 370