Siemens SINUMERIK 840DE

Tool offsets
8.17 Special handling of tool offsets
Fundamentals
8-78 Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
8.17.4 Tool length and plane change
Function
With the set setting data SD 42940 TOOL_LENGTH_CONST not equal to zero, you can
assign tool length components such as length, wear and base dimension to the geometry
axes for turning and grinding tools at a plane change.
Parameters
SD 42940 TOOL_LENGTH_CONST
Setting data not equal to zero:
The assignment between the tool length components (length, wear and tool base dimension)
and the geometry axes is not modified when the machining plane is changed (G17-19).
The following table shows the assignment between the tool length components and the
geometry axes for turning and grinding tools (tool types 400 to 599):
Table of Contents Length 1 Length 2 Length 3
17 Y X Z
*) X Z Y
19 Z Y X
-17 X Y Z
-18 Z X Y
-19 Y Z X
*)
Each value not equal to 0 which is not equal to one of the six listed values is evaluated as
value 18.
The following table shows the assignment between the tool length components and the
geometry axes for all other tools (tool types < 400 or > 599):
Machining plane Length 1 Length 2 Length 3
*) Z Y X
18 Y X Z
19 X Z Y
-17 Z X Y
-18 Y Z X
-19 X Y Z
*)
Each value not equal to 0 which is not equal to one of the six listed values is evaluated as
value 17.
Further information
The representation in the tables assumes that the geometry axes
to 3 are labeled X, Y, Z. The axis order and not the axis identifier determines the assignment
between an offset and an axis.