Mirroring Of Tool Lengths - Siemens SINUMERIK 840DE Programming Manual

Further information
When orientatable toolholders are used, it is frequently practical to define all tools for a non-
mirrored basic system, even those which are only used for mirrored machining. When
machining with mirrored axes, the toolholder is then rotated such that the actual position of
the tool is described correctly. All tool length components then automatically act in the
correct direction, dispensing with the need for control of individual component evaluation via
setting data, depending on the mirroring status of individual axes.
Further application options
The use of orientatable toolholder functionality can also be useful if there is no physical
option of turning tools on the machine, even though tools with different orientations are
permanently installed. Tool dimensioning can then be performed uniformly in a basic
orientation, where the dimensions relevant for machining are calculated according to the
rotations of a virtual toolholder.
8.17.1

Mirroring of tool lengths

Function
Set setting data SD 42900 MIRROR_TOOL_LENGTH and SD 42910
MIRROR_TOOL_WEAR not equal to zero can be used to mirror tool length components and
components of the tool base dimensions with wear values of the corresponding axes.
Parameters
SD 42900 MIRROR_TOOL_LENGTH
Setting data not equal to zero:
The tool length components ($TC_DP3, $TC_DP4 and $TC_DP5) and the components of
the tool base dimensions ($TC_DP21, $TC_DP22 and $TC_DP23), whose associated axes
are mirrored, are also mirrored – through sign inversion.
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
8.17 Special handling of tool offsets
Tool offsets
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