Siemens SINUMERIK 840D sl Function Manual page 1496

W1: Tool offset
18.10 Special handling of tool compensations
Examples
Temperature compensation in tool direction
Example of a 5-axis machine with rotating tool on which the tool can be rotated around the C
and B axes.
In its initial state, the tool is parallel to the Z axis. If the B axis is rotated through 90 degrees,
the tool points in the X direction.
Therefore, a temperature compensation value in the following setting data is also effective in
the direction of the machine X axis if transformation is active:
SD42960 $SC_TOOL_TEMP_COMP[2] (temperature compensation with reference to tools)
If the transformation is deactivated with the tool in this direction, the tool orientation is, by
definition, parallel again to the Z axis and thus different to its actual orientation. The
temperature offset in the X axis direction is therefore reduced to zero and reapplied
simultaneously in the Z direction.
Example of a 5-axis machine with rotating tool (transformation type 24). The relevant machine
data is listed below:
● The first rotary axis rotates around Z, C-axis
● The second rotary axis rotates around Y, B-axis
The essential machine data is shown in the table below:
Machine data
MD20390 $MC_TOOL_TEMP_COMP_ON
MD32750 $MA_TEMP_COMP_TYPE[ AX1 ]
MD32750 $MA_TEMP_COMP_TYPE[ AX2 ]
MD32750 $MA_TEMP_COMP_TYPE[ AX3 ]
MD24100 $MC_TRAFO_TYPE_1
MD24110 $MC_TRAFO_AXES_IN_1[0]
MD24110 $MC_TRAFO_AXES_IN_1[1]
MD24110 $MC_TRAFO_AXES_IN_1[2]
MD24110 $MC_TRAFO_AXES_IN_1[3]
MD24110 $MC_TRAFO_AXES_IN_1[4]
MD24120 $MC_TRAFO_GEOAX_AS‐
SIGN_TAB_1[0]
MD24120 $MC_TRAFO_GEOAX_AS‐
SIGN_TAB_1[1]
MD24120 $MC_TRAFO_GEOAX_AS‐
SIGN_TAB_1[2]
MD24570 $MC_TRAFO5_AXIS1_1[0]
MD24570 $MC_TRAFO5_AXIS1_1[1]
1496
Value Remark
= TRUE Temperature compensation active
= 4 Compensation in tool direction
= 4 Compensation in tool direction
= 4 Compensation in tool direction
Assignment of transformation type
24
= 24 Transformer type 24 in first channel
= 1 First axis of the transformation
= 2 Second axis of the transformation
= 3 Third axis of the transformation
= 5 Fifth axis of the transformation
= 4 Fourth axis of the transformation
= 1 Geometry axis for channel axis 1
= 2 Geometry axis for channel axis 2
= 3 Geometry axis for channel axis 3
= 0.0
= 0.0 Direction
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions