Siemens SINUMERIK 802D sl Programming And Operating Manual page 242

Programming
10.3 Axis movements
Figure 10-25 Exact stop window coarse or fine, in effect for G60/G9; enlarged display of the windows
Programming example
N5 G602
N10 G0 G60 Z...
N20 Y... Z...
...
N50 G1 G601 ...
N80 G64 Z...
...
N100 G0 G9 Z...
N111 ...
Note
The G9 command only generates exact stop for the block in which it is programmed; G60,
however, is effective until it is canceled by G64.
Continuous-path control mode G64
The objective of the continuous-path control mode is to avoid deceleration at the block
boundaries and to switch to the next block with a path velocity as constant as possible (in
the case of tangential transitions). The function works with look-ahead velocity control over
several blocks.
242
; Exact stop window coarse
; Exact stop modal
; G60 continues to act
; Exact stop window fine
; Switching over to continuous-path mode
; Exact stop acts only in this block
; Again continuous-path mode
Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
Surface grinding