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

7.3.4

Tool length and plane change

Function
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
*)
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
Note
Evaluation of individual wear components (assignment to geometry axes, sign evaluation)
is influenced by:
• The active plane
• The adapter transformation
• Following setting data:
– SD42910 $SC_MIRROW_TOOL_WEAR
– SD42920 $SC_WEAR_SIGN_CUTPOS
– SD42930 $SC_WEAR_SIGN
– SD42940 $SC_TOOL_LENGTH_CONST
– SD42950 $SC_TOOL_LENGTH_TYPE
Length 1
Y
X
Z
X
Z
Y
Each value not equal to 0, which is not equal to one of the six listed values, is evaluated as value
18.
7.3 Special handling of tool offsets
Length 2
X
Z
Y
Y
X
Z
Tool offsets
Length 3
Z
Y
X
Z
Y
X
463