Siemens SINUMERIK 840D sl Function Manual page 1367

Tool cutting edge D
A tool Tx can be assigned various tool cutting edges D1 ... Dn.
Figure 18-1
Maximum number of tool cutting edges per tool
The maximum number of tool cutting edges (D numbers) that can be defined for each tool, is
specified using the following machine data:
● MD18106 $MN_MM_MAX_CUTTING_EDGE_PERTOOL
D function
The selection of the tool cutting edge 1 ... n required for machining is realized by programming
the appropriate D function, e.g. in the part program with D1 ... Dn. The selected tool cutting
edge always refers to the currently active tool. A tool cutting edge without active tool (actual
T number is T0 ⇒ no tool selected), is not effective.
All tool offsets of the active tool Tx are deselected using D0.
Selecting the cutting edge when changing tool
When selecting a new tool using a new T number,and loading this tool, the following options
are available to select the cutting edge:
● The cutting edge number Dx is programmed.
● The cutting edge number is defined by the machine data:
MD20270 $MC_CUTTING_EDGE_DEFAULT =<value> (basic position of the tool cutting
edge without programming)
Value
≠ 0
= -1
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Example of a tool Tx with 9 cutting edges (D1 to D9)
Meaning
= 0 No automatic cutting edge selection in accordance with M06
Number of the cutting edge, which is selected in accordance with M06
The cutting edge number of the old tool is retained and is also selected for the new tool, in
accordance with M06.
W1: Tool offset
18.2 Tool
1367