Fast Retraction During Thread Cutting - Siemens SINUMERIK 840D Function Manual

V1: Feedrates
5.2 Path feedrate F
See also
Acceleration behavior of the axis for G33, G34 and G35 (Page 138)
5.2.3.5

Fast retraction during thread cutting

Function
The "Rapid retraction during thread cutting" function can be used to interrupt thread cutting
without causing irreparable damage in the following circumstances:
● NC stop (NC/PLC interface signal)
● Alarms that implicitly trigger NC stop
● Switching of a rapid input
Further information
Programming Manual Advanced; Fast retraction from the contour
The retraction motion can be programmed via:
● Retraction path and retraction direction (relative)
● Retraction position (absolute)
Note
Tapping
The "Fast retraction" function cannot be used with tapping (G331 / G332).
Programming
Syntax
Enable fast retraction, retraction motion via retraction path and retraction direction:
G33 ... LFON DILF=<Value> LFTXT/LFWP ALF=<Value>
Enable fast retraction, retraction motion via retraction position:
POLF[<Axis name>]=<Value> LFPOS
POLFMASK/POLFMLIN(<Axis 1 name>,<Axis 2 name>, etc.)
G33 ... LFON
Disable fast retraction for thread cutting:
LFOF
Meaning
LFON:
LFOF:
142
Enable fast retraction for thread cutting (G33).
Disable fast retraction for thread cutting (G33)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA