HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 305)

HEIDENHAIN TNC 640 305
9.4 Miscellaneous F
unctions f
o
r Cont
our
ing Beha
vior
Suppressing touch probe monitoring: M141
Standard behavior
When the stylus is deflected, the TNC outputs an error message as
soon as you attempt to move a machine axis.
Behavior with M141
The TNC moves the machine axes even if the touch probe is
deflected. This function is required if you wish to write your own
measuring cycle in connection with measuring cycle 3 in order to
retract the stylus by means of a positioning block after it has been
deflected.
Effect
M141 is effective only in the block in which it is programmed.
M141 becomes effective at the start of block.
Delete basic rotation: M143
Standard behavior
The basic rotation remains in effect until it is reset or is overwritten
with a new value.
Behavior with M143
The TNC erases a programmed basic rotation from the NC program.
Effect
M143 is effective only in the block in which it is programmed.
M143 becomes effective at the start of the block.
Danger of collision!
If you use M141, make sure that you retract the touch
probe in the correct direction.
M141 functions only for movements with straight-line
blocks.
The function M143 is not permitted during mid-program
startup.