Siemens SINUMERIK 840D sl Function Manual page 1517

● Setting data:
SD42940 $SC_LENGTH_CONST (change of tool components on change of planes)
● Setting data:
SD42950 $SC_TOOL_LENGTH_TYPE (allocation of the tool length components
independent of tool type)
● The orientation component of the current complete frame (rotation and mirroring, no work
offsets or scales)
● The orientation component and the resulting length of the active toolholder with orientation
capability
● The orientation component and the resulting length of an active transformation
● In addition to the data describing the environment of the tool, the T number, D number and
DL number of the active tool are also stored, so that the tool can be accessed later in the
same environment as the TOOLENV call, without having to name the tool again.
Not in the tool environment
The value of the machine data determines whether the adapter length or the tool base
dimension is included in the tool length calculation:
MD18104 $MN_MM_NUM_TOOL_ADAPTER (tool adapter in TO area).
Since a change to this machine data only takes effect after Power On, it is not saved in the
tool environment.
Note
Resulting length of toolholders with orientation capability and transformations:
Both toolholders with orientation capability and transformations can use system variables or
machine data, which act as additional tool length components, and which can be subjected
partially or completely to the rotations performed. The resulting additional tool length
components must also be stored when TOOLENV is called, because they represent part of the
environment, in which the tool is used.
Adapter transformation:
The adapter transformation is a property of the tool adapter and thus of the complete tool. It
is, therefore, not part of a tool environment, which can be applied to another tool.
By saving the complete data necessary to determine the overall tool length, it is possible to
calculate the effective length of the tool at a later point in time, even if the tool is no longer
active or if the conditions of the environment (e.g., G codes or setting data) have changed.
Similarly, the effective length of different tool can be calculated assuming that it would be used
under the same conditions as the tool, for which the status was saved.
TOOLENV function
Saving a tool environment
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
W1: Tool offset
18.12 Working with tool environments
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