Siemens SINUMERIK 840D sl Programming Manual page 80

Tool offsets
5.6 Tool offset call (D)
G41:
G42:
G40:
Note
The tool radius compensation is described in detail in the section "Tool radius compensation"
section.
Type of D programming
The type of D programming is defined via machine data.
This can be done as follows:
• D number = cutting edge number
D numbers ranging from 1 to max. 12 are available for every tool T<number> or T="Name"
(with TOOLMAN). These D numbers are assigned directly to the tool cutting edges.
A compensation data record ($TC_DPx[t,d]) belongs to each D number (= cutting edge
number).
• Free selection of D numbers
The D numbers can be freely assigned to the cutting edge numbers of a tool. The upper
limit for the D numbers that can be used is limited by a machine data.
• Absolute D number without reference to the T number
Independence between D number and T number can be selected in systems without tool
management. The reference of T number, cutting edge and offset by the D number is
defined by the user. The range of D numbers is between 1 and 32000.
References:
Function Manual, Basic Functions; Tool Offset (W1),
Function Manual, Tool Management, Chapter: "Variants of D-number assignments"
80
Command for the activation of the tool radius compensation with machining
direction left of the contour
Command for the activation of the tool radius compensation with machining
direction right of the contour
Command for the deactivation of the tool radius compensation
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals