Siemens SINUMERIK 840D sl Operating Manual page 548

Programming technology functions (cycles)
10.6 Further cycles and functions
When projection angles around YZ and ZY are programmed, the new Y-axis of the swiveled
coordinate system lies in the old X-Y plane.
● directly
For direct swiveling, the required positions of the rotary axes are specified. The HMI
calculates a suitable new coordinate system based on these values. The tool axis is aligned
in the Z direction. You can derive the resulting direction of the X and Y axis by traversing
the axes.
Note
Direction of rotation
The positive direction of each rotation for the different swivel versions is shown in the help
displays.
Axis sequence
Sequence of the axes which are rotated around:
XYZ or XZY or YXZ or YZX or ZXY or ZYX
Direction (minus/plus)
Direction reference of traversing direction of rotary axis 1 or 2 of the active swivel data set
(machine kinematics). The NC calculates two possible solutions of the rotation / offset
programmed in CYCLE800 using the angle traversing range of the rotary axes of the machine
kinematics. Usually, only one of these solutions is technologically suitable. The solutions differ
by 180 degrees in each case. Selecting the "minus" or "plus" direction determines which of
the two possible solutions is to be applied.
● "Minus" → Lower rotary axis value
● "Plus" → Higher rotary axis value
Also in the basic setting (pole setting) of the machine kinematics, the NC calculates two
solutions and these are approached by CYCLE800. The reference is the rotary axis that was
set as direction reference when commissioning the "swivel" function.
If one of the two positions cannot be reached for mechanical reasons, the alternative position
is automatically selected irrespective of the setting of the "Direction" parameter.
Procedure
548
Machine manufacturer
Please observe the information provided by the machine manufacturer.
1. The part program or ShopTurn program to be processed has been cre‐
ated and you are in the editor.
2. Select the "Miscellaneous" softkey.
Operating Manual, 05/2017, A5E40868721
Turning