Siemens SINUMERIK 840D sl Function Manual page 186

W1: Tool offset
2.14 Special handling of tool offsets
Temperature compensation values immediately follow any applied change in orientation. This
applies in particular when an orientation transformation is activated or deactivated.
The same is true when the assignment between geometry axes and channel axes is changed.
The temperature compensation value for an axis is reduced to zero (interpolatory), for example,
when it ceases to be a geometry axis after a transformation change. Conversely, any
temperature compensation value for an axis which changes over to geometry axis status is
applied immediately.
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]
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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
Function Manual, 06/2019, A5E47435126B AA
Tools