Programming
8.3 Axis movements
8-164
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
6FC5 398-3CP10-0BA0
Y
X
G601
G602
(fine)
(coarse)
Block change enable
for “coarse“ / for “fine”
Fig. 8-28 Exact stop window coarse or fine, in effect for G60/G9; enlarged display of the windows
Programming example
N5 G602 ; exact-stop window, coarse
N10 G0 G60 X... ; Exact stop, modal
N20 X... Y... ; G60 continues to be effective
...
N50 G1 G601 ... ; Exact-stop window, fine
N80 G64 X... ; Switching to continuous path-control mode
...
N100 G0 G9 X... ; Exact stop is only effective for this block
N111 ... ; Continuous-path control mode again
Remark: The G9 command only generates exact stop for the block in which it is program-
med; 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 reduced rapidly enough so that the
axes are subject to a relatively high velocity change over a short time. This may lead to a
significant jerk (acceleration change). The size of the jerk can be limited by activating the
SOFT function.
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