Mirror Tool Lengths (Sd42900 $Sc_Mirror_Tool_Length) - Siemens SINUMERIK 840D sl Function Manual

Detailed Description
2.8 Special handling of tool compensations
2.8.2

Mirror tool lengths (SD42900 $SC_MIRROR_TOOL_LENGTH)

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 2-49
134
Application example: Double-spindle turning machine
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0