Siemens SINUMERIK 840Di Function Manual page 1825

_LEN[11]
_COMP
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
REAL
Result vector
The vector components are arranged in the following order:
Tool type
Length of cutting edge
Abscissa
Ordinate
Applicate
Tool radius
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).
STRING
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 arbitrary.
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 substring are as follows:
-: (Minus sign can only be used as first character):
The complete tool length is calculated, minus the components specified in the next string.
C: Adapter or tool base dimension (whichever of the two alternative components is active for
the tool in use)
E: Setup offsets
G: Geometry
K: Kinematic transformation (is only evaluated for generic 3, 4 and 5-axis transformation)
(LEN[0])
(LEN[1])
(LEN[2])
(LEN[3])
(LEN[4])
(LEN[5])
Detailed Description
2.10 Working with tool environments
2-145