Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual page 85

Exact stop G60, G9
If the exact stop function (G60 or G9) is active, the velocity for reaching the exact end position at the end of a block is
decelerated to zero.
Another modal G group can be used here to set when the traversing movement of this block is considered ended and the
next block is started.
● G601; Exact stop window fine
Block advance takes place when all axes have reached the "Exact stop window fine" (value in the machine data).
● G602: Exact stop window coarse
Block advance takes place when all axes have reached the "Exact stop window coarse" (value in the machine data).
The selection of the exact stop window has a significant influence on the total time if many positioning operations are
executed. Fine adjustments require more time.
See the following illustration for exact stop window coarse or fine, in effect for G60/G9:
Programming example
N5 G602
N10 G0 G60 X20
N20 X30 Y30
N30 G1 G601 X50 Y50 F100
N40 G64 X70 Y60
N50 G0 X90 Y90
N60 G0 G9 X95
N70 G0 X100 Y100
M30
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.
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA1, 01/2014
; 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
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