Siemens SINUMERIK User Manual

Programming and Operating Manual (Turning)
01/2017
99
N20 X20 Z0
;G60 continues to act
N30 X30 Z-40
N40 M3 S1000
N50 G1 G601 X35 Z-50 F0.12
; Exact stop window fine
N60 G64 Z-65
;Switching over to continuous-path mode
N70 X40 Z-70
N80 G0 G9 Z-80
; Exact stop acts only in this block
N90 X45 Z-90
;Again continuous-path mode
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
; Continuous-path mode
N20 X20 Z0
; Continuous-path control mode continues to be active
N30 Z-40
N40 G60 X30 Z-50
; Switching over to exact stop
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.

Siemens SINUMERIK Specifications

General

Brand	Siemens
Model	SINUMERIK
Category	Control Unit
Language	English