Siemens Sinumerik 840D sl Programming Manual page 71

G40
Meaning
D:
<number>:
D0:
G41:
G42:
G40:
Note
The tool radius compensation is described in detail in the "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. An
offset data block ($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, Section: "Variants of D-number assignments"
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Command for the activation of an offset data block for the active tool
The tool length offset is applied with the first programmed traverse of the associated
length compensation axis.
Notice:
A tool length offset can also take effect without D programming, when the automatic
activation of a tool edge has been configured for the tool change (→ see machine
manufacturer's specifications).
The tool offset data block to be activated is specified via the <number> parameter.
The type of D programming depends on the configuration of the machine (see para‐
graph "Type of D programming").
Range of values: 0 - 32000
Command for the deactivation of the offset data block for the active tool
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
Tool offsets
6.6 Tool offset call (D)
71