Syntax
TOWSTD
TOWMCS
TOWWCS
TOWBCS
TOWTCS
TOWKCS
Meaning
TOWSTD: Initial setting value for offsets in tool length wear value
TOWMCS: Offsets in tool length in MCS
TOWWCS: Offsets in tool length in WCS
TOWBCS: Offsets in tool length in BCS
TOWTCS: Offsets in tool length at tool carrier reference point (orientable tool carrier)
TOWKCS: Compensations of tool length for tool head (kinematic transformation)
Further information
Distinguishing features
The most important distinguishing features are shown in the following table:
G command Wear value Active orientable tool carrier
TOWSTD Initial value, tool length Wear values are subject to rotation.
TOWMCS Wear value in MCS. TOWMCS is
identical to TOWSTD if a tool carrier
that can be orientated is not active.
It only rotates the vector of the resul‐
tant tool length without taking into
account the wear.
TOWWCS The wear value is converted to the
MCS in the WCS.
The tool vector is calculated as for
TOWMCS without taking into ac‐
count the wear.
TOWBCS The wear value is converted to the
MCS in the BCS.
The tool vector is calculated as for
TOWMCS without taking into ac‐
count the wear.
TOWTCS The wear value is converted to the
MCS in the workpiece coordinate sys‐
tem.
The tool vector is calculated as for
TOWMCS without taking into ac‐
count the wear.
TOWWCS, TOWBCS, TOWTCS: The wear vector is added to the tool vector.
Linear transformation
The tool length can be defined meaningfully in the MCS only if the MCS is generated by linear
transformation from the BCS.
Non-linear transformation
For example, if with TRANSMIT a non-linear transformation is active, then when specifying the
MCS as requested coordinate system, BCS is automatically used.
Work preparation
3.13 Tool offsets
NC programming
748 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
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