Siemens SINUMERIK 840D sl Function Manual page 537

Extensions
An offset of the rotary axis CM can be entered, for example, by compensating the inclined
position of a workpiece in a frame within the frame chain. The x and y values are then as
illustrated in the following diagram.
Figure 7-17
This offset can also be included in the transformation as an offset in the rotary axis or as y-
offset. To ensure that the total axial frame of the TRACYL rotary axis, i.e. the translation, fine
offset, mirroring and scaling, is included in the transformation, the following settings must be
made:
MD24805 $MC_TRACYL_ROT_AX_FRAME_1 = 1
MD24855 $MC_TRACYL_ROT_AX_FRAME_2 = 1
Note
Changes in the axis assignments are converted every time the transformation is selected or
deselected. For further information about axial offsets for rotary axes to the SZS as an offset
on the peripheral surface, please see:
References:
/FB1/ Function Manual Basic Functions; Co-ordinate Systems, Frames (K2)
Axis utilization
The axes:
● in the generated cylinder surface perpendicular to the rotary axis (Y) and
● additional axis (YC)
may not be used as a positioning or oscillation axis.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Rotary axis offset with TRACYL
M1: Kinematic transformation
7.3 TRACYL (option)
537