Siemens SINUMERIK 840D sl Programming Manual page 462

Tool offsets
7.3 Special handling of tool offsets
No kinematic transformation and no orientable toolholder
If neither a kinematic transformation nor an orientable toolholder is active, then all the other
four coordinate systems (except for the WCS) are combined. It is then only the WCS, which
is different to the other systems. Since only tool lengths need to be evaluated, translations
between the coordinate systems are irrelevant.
References:
For more information on tool compensation, see:
Function Manual Basic Functions; Tool Offset (W1)
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:
● TOWSTD Default setting
● TOWMCS wear values
● TOWWCS wear values
● TOWBCS wear values (BCS)
● TOWTCS wear values in the tool coordinate system at the tool holder reference (T tool
● TOWKCS Wear values in the coordinate system of the tool head for kinematic
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For offsets in the tool length
In the machine coordinate system (MCS)
In the workpiece coordinate system (WCS)
In the basic coordinate system
holder reference)
transformation
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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