Siemens SINUMERIK 840D Programming Manual page 180

Milling Cycles
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3.14 Milling circular spigots - CYCLE77 (SW 5.3 and later)
_VARI (machining mode)
You can define the type of machining with parameter
_VARI.
Possible values are:
• 1=Roughing
• 2=Finishing
_AP1 (diameter of blank spigot)
This parameter defines the blank dimension of the
spigot (without sign). The internally calculated radius of
the approach semi-circle 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".
Programming example
Circular spigot
Machine a spigot from a blank with a diameter of 55
mm and a maximum infeed of 10 mm per cut. Enter
a final machining allowance for finishing the spigot
surface. The entire spigot is machined in an
opposed milling operation.
N10 G90 G17 G0 S1800 M3 D1
N20 CYCLE77 (10, 0, 3, -20, ,50, 60, ->
-> 70, 10, 0.5, 0, 900, 800, 1, 1, 55)
N30 T2 M6
N40 S2400 D1 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
3-180
Y
60
Specification of technology values
Roughing cycle call
Tool change
Specification of technology values
Finishing cycle call
End of program
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
03.96
04.00
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