Siemens SINUMERIK 840D sl Programming Manual page 442

Tool offsets
9.11 Cutting data modification for tools that can be rotated (CUTMOD)
Explanations:
In block
orientated. As all offset vectors of the toolholder that can be orientated are 0, the position
that corresponds to the tool lengths specified in
approached.
The toolholder that can be orientated with a rotation of 30° around the B axis is activated in
block
reference point is decisive just as before. This is the reason that in block
approached, which keeps the old tool nose reference point at the zero (i.e. the vector (1, 12)
is rotated through 30° in the Z/X plane).
In block
toolholder that can be orientated, the modified tool nose position becomes 8. The
consequence of this is also the different axis positions.
The tool radius compensation (TRC) is activated in blocks
tool nose positions in both program sections have no effect on the end positions of the
blocks in which the TRC is active; the corresponding positions are therefore identical. The
different tool nose positions only become effective again in the deselect blocks
N300
Further information
Effectiveness of the modified cutting data
The modified tool nose position and the modified tool nose reference point are immediately
effective when programming, even for a tool that is already active. A tool does not have to be
re-selected for this purpose.
Influence of the active machining plane
To determine modified tool nose position, cutting direction and holder or clearance angle, the
evaluation of the cutting edge in the active plane (
However, if setting data SD42940 $SC_TOOL_LENGTH_CONST (change of the tool length
component when selecting the plane), a valid value not equal to zero (plus or minus 17, 18
or 19), then its contents define the plane in which the relevant quantities are evaluated.
System variables
The following system variables are available:
System variables
$P_CUTMOD_ANG /
$AC_CUTMOD_ANG
442
, initially the tool is selected for
N180
. As the tool nose position is not modified due to
N200
, contrary to block
N260
.
Meaning
Supplies the (non-rounded) angle in the active machining plane, that was
used as basis for the modification of the cutting data (tool nose position,
cut direction, clearance angle and holder angle) for the functions
activated using
$P_CUTMOD_ANG refers to the actual state in the preprocessing,
$AC_CUTMOD_ANG to the actual main run block.
and non-rotated toolholders that can be
CUTMOD=0
$TC_DP3[1,1]
is effective. As a result of the rotation of the
N200 CUTMOD=2
G17
and/or $SC_CUTDIRMOD.
CUTMOD
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
and
$TC_DP4[1,1]
, the old tool nose
CUTMOD=0
N210
and/or . The different
N220 N270
- ) is decisive.
G19
is
the position is
and/or
N260
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