Siemens SINUMERIK 840D Programming Manual page 230

3
Milling Cycles
3.16 Swiveling – CYCLE800 (SW 6.2 and higher)
Note
When programming with standard cycles and high settings for the
retraction plane and large swivel angles (through 90 degrees with
multiface machining) it is possible that the traversing area of the
machine may be too small (software end position violation), as
the order of approach is always the machining plane (for G17 X,
Y) first, followed by the infeed axis (Z). The retraction plane can
be reduced to optimize this behavior.
_DIR (swivel, direction)
• Swivel yes
Rotary axes are positioned or the operator can turn the
manual rotary axes.
• Swivel no (calculation only)
If rotary axes are not to be traversed after activating the swivel
cycle, the "Swivel no" selection applies. Application: Auxiliary
swivel levels according to workpiece drawing
• Direction minus/plus
Reference to rotary axis 1 or 2 when direction of travel is
selected in the swivel cycle interactive screen form. Due to the
angular range of the rotary axes of machine kinematics, the
NCU calculates two possible solutions. One of these solutions
is normally appropriate technologically. The rotary axis (1st or
2nd rotary axis) to which the two solutions are to refer, is
selected in the CYCLE800 start-up menu. The choice between
the two possible solutions to be traversed is made in the input
screen form for the swivel cycle.
_ST (swivel plane)
• New
Previous swivel frames and programmed frames
are deleted and a new swivel frame formed according to the
values specified in the input screen.
Every main program must begin with a swivel cycle with the
new swivel plane to ensure that a swivel frame from another
program is not active.
• Additive
The swivel frame is added to the swivel frame of the last
swivel cycle.
If several swivel cycles are programmed in a program and
programmable frames are also active between them (e.g.
AROT ATRANS), these are taken into account in the swivel
frame.
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
11.02
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