Mirroring Tool Lengths - Siemens SINUMERIK 840D sl Function Manual

● SD42950 $SC_TOOL_LENGTH_TYPE (allocation of the tool length components
independent of tool type) (Page 172)
● SD42960 $SC_TOOL_TEMP_COMP (tool length offsets) (Page 184)
2.14.2

Mirroring tool lengths

Activation
Tool length mirroring is activated via the setting data:
SD42900 $SC_MIRROR_TOOL_LENGTH <> 0 (TRUE) (Sign change tool length when
mirroring)
Function
The following components are mirrored by inverting the sign:
● Tool lengths: $TC_DP3, $TC_DP4, $TC_DP5
● Tool base dimensions: $TC_DP21, $TC_DP22, $TC_DP23
Mirroring is performed for all tool base dimensions whose associated axes are mirrored. Wear
values are not mirrored.
Mirror wear values
The following setting data should be set in order to mirror the wear values:
SD42910 $SC_MIRROR_TOOL_WEAR <> 0 (Sign change tool wear when mirroring)
Inverting the sign mirrors the wear values of the tool length components whose associated axes
are mirrored.
Figure 2-46
Tools
Function Manual, 06/2019, A5E47435126B AA
Application example: Double-spindle turning machine
W1: Tool offset
2.14 Special handling of tool offsets
181