Activation Of The Tool Offset - Siemens SINUMERIK 840D sl Function Manual

Selection of cutting edge for tool change
Following selection and loading of a new tool, the following options are provided for selection
of the cutting edge:
● Programming of the cutting edge number D<x>.
● The cutting edge number is defined by the machine data:
MD20270 $MC_CUTTING_EDGE_DEFAULT (basic position of the tool cutting edge
without programming)
2.2.2

Activation of the tool offset

With D1 to D<n>, the tool offset for a cutting edge is activated for the active tool. Tool length
compensation and tool radius compensation become effective at different times, however:
● The tool length compensation (TLC) is performed on the first traversing motion of the axis
on which the TLC is to act.
This traversing motion must be a linear interpolation (G0, G1, POS, POSA) or polynomial
interpolation (POLY). If the POS/POSA axis is one of the active geometry axes, tool length
compensation is applied with the first axis motion, in which it is operative.
● Tool radius compensation (TRC) becomes active when G41/G42 is programmed in the
active plane (G17, G18 or G19).
In the NC block in which the tool radius compensation is activated with G41/G42, G0 (rapid
traverse) or G1 (linear interpolation) must be active and at least one geometry axis of the
active working plane must be programmed.
If only one geometry axis is specified when switching on, the last position of the second
geometry axis is automatically supplemented and then traversed in both axes.
If the axes are not geometry axes, then they must be transformed into geometry axes using
GEOAX programming.
The selection of the TRC with G41/G42 is only permitted in a program block with G0 (rapid
traverse) or G1 (linear interpolation).
Tools
Function Manual, 06/2019, A5E47435126B AA
Value Meaning
0 No automatic cutting edge selection after M06.
≠ 0 Number of the cutting edge, which is selected in accordance with M06.
-1 The cutting edge number of the old tool is retained and is also selected for the new tool
after M06.
-2 The tool nose radius compensation of the old tool remains active until a new cutting edge
is programmed with D.
2.2 Tool change and activation of tool offset
W1: Tool offset
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