Motion commands
4.19 Stop with thread cutting (LFOF, LFON, LFTXT, LFWP, LFPOS)
Fundamentals
182 Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Parameters
LFON
Enable fast retraction for thread cutting (G33)
LFOF
Disable fast retraction for thread cutting (G33)
LIFTFAST
Fast retraction option acts with LFON in every retraction direction
DILF
Determine retraction path (length)
ALF
Define retraction direction for plane to be executed (LFTXT)
Note
LFON or LFOF can always be programmed, they are evaluated only during thread cutting
(G33).
Example of enabling fast retraction in tapping
N55 M3 S500 G90 G18
;Active machining plane
...
;Approach start position
N65 MSG ("thread cutting")
;Tool infeed
MM_THREAD:
N67 $AC_LIFTFAST=0
;Reset before beginning of
;thread
N68 G0 Z5
N68 X10
N70 G33 Z30 K5 LFON DILF=10 LFWP ALF=3
;Enable fast retraction for thread ;cutting
Retraction path =10mm, retraction plane Z/X (due to G18)
Retraction direction -X (with ALF=3; retraction direction +X)
N71 G33 Z55 X15 K5
N72 G1
;Deselect thread cutting
N69 IF $AC_LIFTFAST GOTOB MM_THREAD
;If thread cutting was ;interrupted
N90 MSG ("")
...
N70 M30
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