Siemens SINUMERIK 808D User Manual page 229

_PR AD (pocket radius)
The form of the circular pocket is determined solely by its radius.
If this is smaller than the tool radius of the active tool, then the cycle is aborted and alarm 61105 "Cutter radius too large" is
output.
_PA, _PO (pocket center point)
Use the parameters _PA and _PO to define the pocket center point. Circular pockets are always dimensioned across the
center.
_VARI (machining type)
Use the parameter _VARI to define the machining type.
Possible values are:
Units digit:
● 1=roughing
● 2=finishing
Tens digit (infeed):
● 0=vertically to pocket center with G0
● 1=vertically to pocket center with G1
● 2=along a helical path
If a different value is programmed for the parameter _VARI, the cycle is aborted after output of alarm 61002 "Machining type
defined incorrectly".
N o te
A tool compensation must be programmed before the cycle is called. Otherwise, the cycle is aborted and alarm 61000 "No
tool compensation active" is output.
Internally in the cycle, a new current workpiece coordinate system is used which influences the actual value display. The
zero point of this coordinate system is to be found in the pocket center point.
At the end of the cycle, the original coordinate system is active again.
Programming example: Circular pocket
With this program, you can machine a circular pocket in the YZ plane. The center point is determined by Y50 Z50. The
infeed axis for the depth infeed is the X axis. Neither finishing dimension nor safety clearance is specified. The pocket is
machined with down-cut milling. Infeed is performed along a helical path.
A milling cutter with 10 mm radius is used. See the following programming example for circular pocket:
N10 G17 G90 G0 S650 M3 T1 D1
N20 X50 Y50
N30 POCKET4(3, 0, 0, -20, 25, 50, 60, 6, 0, 0, 200, 100, 1,
21, 0, 0, 0, 2, 3)
N40 M02
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
; Specification of technology values
; Approach starting position
; Cycle call
Parameters FAL and FALD are omitted
; End of program
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