Siemens SINUMERIK 840Di sl Programming Manual page 272

Feedrate Control and Spindle Motion
7.1 Feedrate (G93, G94, G95 or F..., FGROUP, FGREF)
Example of helical interpolation
Path axes X and Y traverse with the programmed feedrate, the infeed axis Z is a
synchronized axis.
N10 G17 G94 G1 Z0 F500
N20 X10 Y20
N25 FGROUP(X, Y)
N30 G2 X10 Y20 Z-15 I15 J0 F1000
FL[Z]=200
...
N100 FL[Z]=$MA_AX_VELO_LIMIT[0,Z]
N110 M30
Feedrate G93, G94, G95
All of the commands are modal. If the G feedrate command is switched between G93, G94
or G95, the path feedrate must be reprogrammed. The feedrate can also be specified in
deg/rev when machining with rotary axes.
272
;Tool infeed
;Approach start position
;Axes X/Y are path axes, Z is a
;synchronized axis
;On the circular path, the feedrate is1000 mm/min.
;Traversing in the Z direction is synchronized.
;The limit velocity is deselected
;when the velocity
;value is read from the MD.
;End of program
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals