Siemens SINUMERIK 840D sl Function Manual page 491

Transformation with supplementary linear axis
If the machine has another linear axis which is perpendicular to both the rotary axis and the
first linear axis, transformation type 257 can be used to apply tool offsets with the real Y axis.
It is assumed that the working area of the second linear axis is small and is not to be used
for the retraction of the part program.
The existing settings for MD24120 $MC_TRAFO_GEOAX_ASSIGN_TAB_n apply.
Axis image
The following paragraph describes how the transformation axis image is specified.
TRAFO_AXES_IN_n
Three channel axis numbers must be specified for the transformation data block n:
MD24110 $MC_TRAFO_AXES_IN_1[0]=channel axis number of the axis perpendicular to
the rotary axis.
MD24110 $MC_TRAFO_AXES_IN_1[1]=channel axis number of the rotary axis.
MD24110 $MC_TRAFO_AXES_IN_1[2]=channel axis number of the axis parallel to the
rotary axis.
Example for the configuration according to the figure "Face-end machining of turned part"
(TRANSMIT):
MD24110 $MC_TRAFO_AXES_IN_1[0]=1
MD24110 $MC_TRAFO_AXES_IN_1[1]=3
MD24110 $MC_TRAFO_AXES_IN_1[2]=2
The setting must be made before TRANSMIT or TRANSMIT(t) is activated. Axis numbers
must correspond with the channel axis sequence in
MD24120 $MC_TRAFO_GEOAX_ASSIGN_TAB_n.
For transformation type 257 the following indices apply to
MD24110 $MC_TRAFO_AXES_IN_n[ ].
Meaning of indices in relation to base coordinate system (BCS):
● [0]: Cartesian axis perpendicular to rotary axis (in machine zero position, this axis is
● [1]: Cartesian axis perpendicular to rotary axis
● [2]: Cartesian axis parallel to rotary axis (if configured)
● [3]: Linear axis parallel to index [2] in initial position of machine
Meaning of indices in relation to machine coordinate system (MCS):
● [0]: Linear axis perpendicular to rotary axis
● [1]: Rotary axis
● [2]: Linear axis parallel to rotary axis (if configured)
● [3]: Linear axis perpendicular to the axes of indices [0] and [1]
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
parallel to the linear axis which is positioned perpendicular to the rotary axis)
Kinematic Transformation (M1)
7.2 TRANSMIT
491