Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

Страница: 1382 / 1799

V1: Feedrates
17.2 Path feedrate F
Basic Functions
1382
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Retraction path
The retraction path can be configured in machine data:
MD21200 LIFTFAST_DIST.
If required, this path in the part program can be changed by writing
DILF
at any point.
Following an NC reset, the value entered in machine data:
MD21200 LIFTFAST_DIST
(default value) is always active.
Retraction direction
The method for defining the retraction direction is controlled in conjunction with the variable
ALF
using the
following keywords:
• LFTXT
The plane of the retraction movement is determined by the path tangent and the tool direction. This G code
(default setting) is used to program the response on a fast lift.
For information about
ALF
programming, refer to:
References:
/PGA/ Programming Guide, Operations Planning
/FB1/ Function Manual, Basic Function; Mode Group, Channel, Program Operation (K1);
Chapter: Asynchronous Subroutines (ASUBs), Interrupt Routines
• LFWP
The plane of the retraction movement is the active working plane selected with G codes
G17
,
G18
or
G19
. The
direction of the retraction plane is independent of the path tangent. This allows a fast lift to be programmed
parallel to the axis.
These G functions can always be programmed.
The default setting for NC Reset and/or NC Start is specified in machine data::
MD20150 GCODE_RESET_VALUES.
In the plane of the retraction movement,
ALF
is used, as before, to program the direction in discrete steps of 45
degrees. With
LFTXT
, retraction in the tool direction was defined for
ALF=1
.
With
LFWP
the direction in the working plane is derived from the following assignment:
G17:
X/Y plane
ALF=1
Retraction in X direction
ALF=3
Retraction in Y direction
G18:
Z/X plane
ALF=1
Retraction in Z direction
ALF=3
Retraction in X direction
G19:
Y/Z plane
ALF=1
Retraction in Y direction
ALF=3
Retraction in Z direction