Siemens SINUMERIK 828D Programming Manual page 449

System variables
$P_CUT_INV /
$AC_CUT_INV
All main run variables ($AC_CUTMOD_ANG, $AC_CUTMOD and $AC_CUT_INV) can be
read in synchronized actions. A read access operation from the preprocessing generates a
preprocessing stop.
Modified cutting data:
If a tool rotation is active, the modified data are made available in the following system
variables:
System variable
$P_AD[2]
$P_AD[10]
$P_AD[11]
$P_AD[24]
Note
The data are always modified with respect to the corresponding tool parameters
($TC_DP2[..., ...] etc.) if the function "cutting data modification for rotatable tools" was
activated using the command
rotation, is activated.
References
For additional information on the function "cutting data modification for rotatable tools", refer
to:
Function Manual Basic Functions; Tool Offset (W1)
Job planning
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
7.11 Cutting data modification for tools that can be rotated (CUTMOD)
Significance
Supplies the value TRUE if the tool is rotated so that the spindle direction
of rotation must be inverted. To do this, the following four conditions must
be fulfilled in the block to which the read operations refer:
1. If a turning or grinding tool is active
(tool types 400 to 599 and / or
SD42950 $SC_TOOL_LENGTH_TYPE = 2).
2. The cutting influence was activated using the language command
.
CUTMOD
3. A toolholder that can be orientated is active, which was designated
using the numerical value of
4. The toolholder that can be orientated rotates the tool around an axis
in the machining plane (this is typically the C axis) so that the
resulting perpendicular of the tool cutting edge is rotated with respect
to the initial position by more than 90° (typically 180°).
The contents of the variable is FALSE if at least one of the specified four
conditions is not fulfilled. For tools whose tool nose position is not
defined, the value of the variable is always FALSE.
$P_CUT_INV refers to the actual state in the preprocessing and
$AC_CUT_INV to the actual main run block.
and a toolholder that can be orientated, which causes a
CUTMOD
.
CUTMOD
Significance
Tool nose position
Holder angle
Cut direction
Clearance angle
Tool offsets
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