Siemens SINUMERIK 840D Programming Manual page 175

03.96
04.00
3
12.97
3.13 Milling rectangular spigots - CYCLE76 (SW 5.3 and later)
(_LENG, _WID) so that a unique position for the spigot
is defined.
_STA (angle)
_STA specifies the angle between the 1st axis of the
plane (abscissa) and the longitudinal axis of the spigot.
_CDIR (milling direction)
The machining direction of the spigot is defined in this
parameter.
Under parameter _CDIR the mill direction
• direct "2 for G2" and "3 for G3" or
• alternatively "climb milling" or "opposed milling"
can be programmed. Climb milling or opposed
milling is determined within the cycle via the spindle
direction activated prior to the cycle call.
Climb
M3 → G3
M4 → G2
_VARI (machining mode)
You can define the type of machining with parameter
_VARI.
Possible values are:
• 1=Roughing
• 2=Finishing
_AP1, _AP2 (blank dimensions)
Blank dimensions (e.g. in the case of precast
workpieces) can be taken into account in machining
of the spigot.
The basic size for the length and width (_AP1 and
_AP2) are programmed without sign and their
symmetrical positions around the spigot center
computed in the cycle. The internally calculated
radius of the approach semi-circle is dependent on
this dimension.
Further notes
A tool offset must therefore be programmed before
the cycle is called. The cycle is otherwise aborted
with alarm 61009 "Active tool number=0".
 Siemens AG 2000 All rights reserved.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
Opposed
M3 → G2
M4 → G3
Milling Cycles
Y
_AP1
3
_AP2
X
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