Mirroring Of Tool Lengths - Siemens SINUMERIK 840D sl Programming Manual

Note
When orientable 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 orientable 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.
9.3.1

Mirroring of tool lengths

Function
When setting data SD42900 $SC_MIRROR_TOOL_LENGTH and
SD42910 $SC_MIRROR_TOOL_WEAR are not set to zero, then you can mirror the tool
length components and components of the basis dimensions with wear values and their
associated axes.
SD42900 $SC_MIRROR_TOOL_LENGTH
Setting data not equal to zero:
The tool length components ($TC_DP3, $TC_DP4 and $TC_DP5) and the components of
the basis dimensions ($TC_DP21, $TC_DP22 and $TC_DP23) are mirrored against their
associated axes, also mirrored – by inverting the sign.
The wear values are not mirrored. If these are also be be mirrored, then setting data
SD42910 $SC_MIRROR_TOOL_WEAR must be set.
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
9.3 Special handling of tool offsets
Tool offsets
393