Siemens SINUMERIK 840Di sl Programming Manual page 185
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Also See for SINUMERIK 840Di sl:
- Commissioning manual (632 pages) ,
- Operating manual (470 pages) ,
- Function manual (274 pages)
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Example
Here, the path interpolation of X is suppressed in the event of a stop and a motion executed
to position POLF[X] at maximum velocity instead. The motion of the other axes continues to
be determined by the programmed contour or the thread lead and spindle speed.
N10 G0 G90 X200 Z0 S200 M3
N20 G0 G90 X170
N22 POLF[X]=210 LFPOS
N23 POLFMASK(X)
N25 G33 X100 I10 LFON
N30 X135 Z-45 K10
N40 X155 Z-128 K10
N50 X145 Z-168 K10
N55 X210 I10
N60 G0 Z0 LFOF
N70 POLFMASK()
M30
Description
The retraction direction in connection with ALF is controlled using the following keywords:
• LFTXT
• LFWP
• LFPOS
The direction is programmed as before in discrete steps of 45 degrees with ALF in the plane
of the retraction motion. With LFTXT, the retraction is defined in the tool direction for ALF=1.
With LFWP the direction in the working plane is derived from the following assignment:
• G17: X/Y plane
• G18: Z/X plane
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
4.19 Stop with thread cutting (LFOF, LFON, LFTXT, LFWP, LFPOS)
The plane in which the fast retraction is executed is calculated from the path tangent and
the tool direction (default setting).
The plane in which the fast retraction is executed is the active working plane.
Retraction of the axis declared with POLFMASK to the absolute axis position
programmed with POLF. See also NC-controlled retraction in /FB3/Function Manual
Special Functions; Coupled Axes and ESR (M3).
ALF has no influence on the retraction direction on several axes or on several axes in
linear relation.
ALF=1 Retraction in X direction
ALF=3 Retraction in Y direction
ALF=1 Retraction in Z direction
ALF=3 Retraction in X direction
;Activate (enable)
;rapid lift of
;the axis X
;Block retraction for all axes
Motion commands
185
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