Siemens SINUMERIK 828D Programming Manual page 278

Motion commands
9.14 Fast retraction for thread cutting (LFON, LFOF, DILF, ALF, LFTXT, LFWP, LFPOS, POLF, POLFMASK,
POLFMLIN)
Significance
LFON
LFOF
DILF=
LFTXT
LFWP
ALF=
278
: Enable fast retraction for thread cutting (
: Disable fast retraction for thread cutting (
: Define length of retraction path
The value preset during MD configuration
(MD21200 $MC_LIFTFAST_DIST) can be modified in the part program by
programming
Note:
The configured MD value is always active following NC-RESET.
The retraction direction is controlled in conjunction with
:
functions
LFTXT
: The plane in which the retraction movement is executed is
LFTXT
calculated from the path tangent and the tool direction (default
setting).
: The plane in which the retraction movement is executed is the
LFWP
active working plane.
: The direction is programmed in discrete degree increments with
plane of the retraction movement.
With
LFTXT
With , the direction in the working/machining plane has the following
LFWP
assignment:
(X/Y plane)
•
G17
; Retraction in the X direction
ALF=1
; Retraction in the Y direction
ALF=3
(Z/X plane)
•
G18
; Retraction in the Z direction
ALF=1
; Retraction in the X direction
ALF=3
(Y/Z plane)
•
G19
; Retraction in the Y direction
ALF=1
; Retraction in the Z direction
ALF=3
References:
Programming options with
fast retraction from the contour" in the Programming Manual, Job Planning.
.
DILF
and .
LFWP
, retraction in the tool direction is defined for
are also described in "Traverse direction for
ALF
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
)
G33
)
G33
with G
ALF
.
ALF=1
in the
ALF
Fundamentals