HEIDENHAIN TNC 620 (340 56x-02) - Manual (Page 307)

HEIDENHAIN TNC 620 307
9.4 Miscellaneous F
unctions f
o
r Cont
our
ing Beha
vior
Effect
M120 must be located in an NC block that also contains radius
compensation RL or RR. M120 is then effective from this block until
„ radius compensation is canceled with R0
„ M120 LA0 is programmed, or
„ M120 is programmed without LA, or
„ another program is called with PGM CALL
„ the working plane is tilted with Cycle 19 or the PLANE function
M120 becomes effective at the start of block.
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 RND and CHF the blocks before and
after RND or CHF 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 32 Tolerance
„ Cycle 19 Working plane
„ PLANE function
„ M114
„ M128