Tool Length And Plane Change - Siemens SINUMERIK 840D sl Programming Manual

Work preparation
3.13 Tool offsets
3.13.3.4

Tool length and plane change

When setting data SD42940 $SC_TOOL_LENGTH_CONST is set not equal to zero, then you
can assign the tool length components – such as lengths, wear and basic dimension – to the
geometry axes for turning and grinding tools when changing the plane.
SD42940 $SC_TOOL_LENGTH_CONST
Setting data not equal to zero:
The assignment of tool length components (length, wear and tool base dimension) to geometry
axes does not change when the machining plane is changed (G17 - G19).
The following table shows the assignment of tool length components to geometry axes for
turning and grinding tools (tool types 400 to 599):
Content
17
*)
19
-17
-18
-19
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 of tool length components to geometry axes for all
other tools (tool types < 400 or > 599):
Operating plane
*)
18
19
-17
-18
-19
Each value not equal to 0, which is not equal to one of the six listed values, is evaluated as value 17.
*)
Note
For representation in tables, it is assumed that geometry axes up to 3 are designated with X,
Y, Z. The axis order and not the axis identifier determines the assignment between a
compensation and an axis.
750
Length 1
Y
X
Z
X
Z
Y
Length 1
Z
Y
X
Z
Y
X
Length 2
X
Z
Y
Y
X
Z
Length 2
Y
X
Z
X
Z
Y
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Length 3
Z
Y
X
Z
Y
X
Length 3
X
Z
Y
Y
X
Z
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