HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 363)

Miscellaneous functions for path behavior 10.4
10
TNC 640 | User's ManualDIN/ISO Programming | 1/2015
363
Restrictions
After an external or internal stop, you can only re-enter the
contour with the function RESTORE POS. AT N. Before you start
the block scan, you must cancel M120, otherwise the TNC will
output an error message.
When using the path functions
G25 and G24, the blocks before
and after G25 or G24 must contain only coordinates in the
working plane.
If you want to approach the contour on a tangential path, you
must use the function APPR LCT. The block with APPR LCT
must contain only coordinates of the working plane
If you want to depart the contour on a tangential path, use the
function DEP LCT. The block with DEP LCT must contain only
coordinates of the working plane
Before using the functions listed below, you have to cancel
M120 and the radius compensation:
Cycle G60 Tolerance
Cycle G80 Working plane
PLANE function
M114
M128