Siemens SINUMERIK 802D Programming And Operating Manual page 267

Figure 10-20 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 X... Z...
...
N50 G1 G601 ...
N80 G64 Z...
...
N100 G0 G9 Z...
N111 ...
Remark: 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.
For non-tangential transitions (corners), the velocity can be reduced rapidly enough so that
the axes are subject to a relatively high velocity change over a short period of time. This may
lead to a significant jerk (acceleration change). The size of the jerk can be limited by
activating the SOFT function.
Cylindrical grinding
Programming and Operating Manual, 07/2009, 6FC5398-4CP10-2BA0
;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
10.3 Axis movements
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