Siemens SINUMERIK 840D Programming Manual page 197

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3.14 Milling circular spigots – CYCLE77 (SW 5.3 and higher)
_AP1 (diameter of blank spigot)
This parameter defines the blank dimension of the
spigot (without sign). The internally calculated radius of
the approach semicircle is dependent on this
dimension.
Further notes
A tool offset must be activated before the cycle is
called. The cycle is otherwise aborted with alarm 61009
"Active tool number=0".
A new workpiece coordinate system that influences the
actual value display is used in the cycle. The zero point
of this coordinate system lies on the pocket center
point.
The original coordinate system becomes active again
after the end of the cycle.
Programming example
Circular spigot
Machine a spigot from a blank with a diameter of
55mm and a maximum infeed of 10mm per cut.
Enter a final machining allowance for finishing the
spigot surface. The entire spigot is machined in a
down-cut milling operation.
N10 G90 G17 G0 S1800 M3 D1 T1
N11 M6
N20 CYCLE77 (10, 0, 3, -20, ,50, 60, ->
-> 70, 10, 0.5, 0, 900, 800, 1, 1, 55)
N30 D1 T2 M6
N40 S2400 M3
N50 CYCLE77 (10, 0, 3, -20, , 50, 60, ->
-> 70, 10, 0, 0, 800, 800, 1, 2, 55)
N40 M30
-> Must be programmed in a single block
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
Y
A
B
60
Specification of technology values
Roughing cycle call
Tool change
Specification of technology values
Finishing cycle call
End of program
3
Milling Cycles
Y
A - B
X Z
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