Siemens SINUMERIK User Manual page 99

N20 X20 Z0
N30 X30 Z-40
N40 M3 S1000
N50 G1 G601 X35 Z-50 F0.12
N60 G64 Z-65
N70 X40 Z-70
N80 G0 G9 Z-80
N90 X45 Z-90
N100 M30
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.
Programming example
N10 G64 G1 Z5 F0.15 M3 S800
N20 X20 Z0
N30 Z-40
N40 G60 X30 Z-50
N50 X45 Z-70
N60 M30
Look-ahead velocity control
In the continuous-path control mode with G64, the control system determines the velocity control for several NC blocks in
advance automatically. This enables acceleration and deceleration across multiple blocks with approximately tangential
transitions. For paths that consist of short travels in the NC blocks, higher velocities can be achieved than without look
ahead.
Programming and Operating Manual (Turning)
01/2017
;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
; Continuous-path mode
; Continuous-path control mode continues to be active
; Switching over to exact stop
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