Siemens SINUMERIK 840D sl Function Manual page 1522

W1: Tool offset
18.12 Working with tool environments
The coordinate system defined in _COMP and _STAT is used as the reference coordinate
system for the length components. If no coordinate system is defined in _COMP, the tool
lengths are represented in the machine coordinate system.
The assignment of the abscissa, ordinate and applicate to the geometry axes depends on
the active plane in the tool environment, i.e. with G17, the abscissa is parallel to X, with
G18 it is parallel to Z, etc.
Components LEN[6] to LEN[10] contain the additional parameters, which can be used to
specify the geometry description of a tool (e.g. $TC_DP7 to $TC_DP11 for the geometry
and the corresponding components for wear or sum and setup offsets).
These 5 additional elements and the tool radius are only defined for components E, G, S,
and W. Their evaluation does not depend on _STAT. The corresponding values in LEN[5]
to LEN[10] can thus only be not equal to zero if at least one of the four specified components
is involved in the tool length calculation. The remaining components do not influence the
result. The dimensions refer to the control's basic system (inch or metric).
_COMP
This string consists of two substrings, which are separated from one another by a colon.
The individual characters (letters) of the first substring identify the tool length components
to be taken into account when calculating the tool length.
The second substring identifies the coordinate system, in which the tool length is to be
output. It consists of only one single relevant character.
The order of the characters in the strings, and their notation (upper or lower case), is arbi‐
trary. Any number of blanks or white spaces can be inserted between the characters.
The letters in the substrings cannot be programmed twice. The meanings in the first sub‐
string are as follows:
-:
C:
E:
G:
K:
S:
T:
W:
1522
Abscissa
Ordinate
Applicate
Tool radius
STRING
(Minus symbol, only allowed as first character): The complete tool length is calcula‐
ted, minus the components specified in the next string.
Adapter or tool base dimension (whichever of the two alternative components is
active for the tool in use)
Setup offsets
Geometry
Kinematic transformation (is only evaluated for generic 3, 4 and 5-axis transformation)
Sum offsets
Toolholder with orientation capability
Wear
(LEN[2])
(LEN[3])
(LEN[4])
(LEN[5])
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions