Siemens SINUMERIK 840D sl Programming Manual page 397

Inclusion of wear values in calculation
The setting data SD42935 $SC_WEAR_TRANSFORM defines which of the three wear
components:
● Wear
● Total offsets fine
● Total offsets coarse
should be subject to a rotation using adapter transformation or a tool holder that can be
orientated if one of the following G codes is active:
●
●
●
●
●
●
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
Default setting
TOWSTD
For offsets in the tool length
wear values
TOWMCS
In the machine coordinate system (MCS)
wear values
TOWWCS
In the workpiece coordinate system (WCS)
wear values (BCS)
TOWBCS
In the basic coordinate system
wear values in the tool coordinate system at the tool holder reference (T tool
TOWTCS
holder reference)
Wear values in the coordinate system of the tool head for kinematic transformation
TOWKCS
Note
Evaluation of individual wear components (assignment to geometry axes, sign evaluation)
is influenced by:
 The active plane
 The adapter transformation
 Following setting data:
– SD42910 $SC_MIRROW_TOOL_WEAR
– SD42920 $SC_WEAR_SIGN_CUTPOS
– SD42930 $SC_WEAR_SIGN
– SD42940 $SC_TOOL_LENGTH_CONST
– SD42950 $SC_TOOL_LENGTH_TYPE
9.3 Special handling of tool offsets
Tool offsets
397