Siemens SINUMERIK 828D Programming Manual page 113

Example 2: Traverse synchronized axes with limit velocity FL
The path velocity of the path axes is reduced if the synchronized axis Z reaches the limit
velocity.
Program code
N10 G0 X0 Y0
N20 FGROUP(X)
N30 G1 X1000 Y1000 G94 F1000 FL[Y]=500
N40 Z-50
Example 3: Helical interpolation
Path axes X and Y traverse with the programmed feedrate, the infeed axis Z is a
synchronized axis.
Program code
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
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
7.1 Feedrate (G93, G94, G95, F, FGROUP, FL, FGREF)
Comment
; Feed of the tool.
; Approach of the starting position
; Axes X/Y are path axes, Z is a
synchronized axis.
; On the circular path, the
feedrate is 1,000 mm/min,
traversing in the Z direction is
synchronized.
; The limit speed is deselected by
reading the speed from the MD.
Read the value from the MD:
; End of program.
Feed control
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