Detailed description
2.1 Path feedrate F
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
27
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
Note
The extension for programming the plane of the retraction movement can be used
independently of thread cutting.
Retraction speed
Retraction is performed at maximum axis velocity.
This can be configured in machine data:
MD32000 MAX_AX_VELO.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...