Procedure When Using Orientational Toolholders - Siemens SINUMERIK 840Di Function Manual

TOROT
If only the tool can be rotated, a frame whose Z axis points in the direction of the tool can be
defined with TOFRAME or TOROT.
PAROT
If the coordinate system needs to be fixed relative to the workpiece, i.e., not only offset
relative to the original position but also rotated according to the rotation of the table, then
PAROT can be used to activate such a rotation in a similar manner to the situation with a
rotary tool.
With PAROT, the translations, scalings and mirrorings in the active frame are retained, but
the rotation component is rotated by the rotation component of a toolholder with orientation
capability corresponding to the table.
PAROT and TOROT take into account the overall change in orientation in cases where the
table or the tool are oriented with two rotary axes. With mixed kinematics only the
corresponding component caused by a rotary axis is considered. It is possible, therefore,
when using TOROT, for example, to rotate a workpiece such that an oblique plane lies
parallel to the X/Y plane fixed in space, whereby rotation of the tool must be taken into
account in machining where any holes to be drilled, for example, are not perpendicular to
this plane.
Language command PAROT is not rejected if no toolholder with orientation capability is
active. This causes no changes in the programmed frame.
Note
For more information about the TCARR and TOROT functions, as well as PAROT in relation to
channel-specific system frames, please refer to:
References:
/FB1/ Description of Functions, Basic Machine; Axes, Coordinate systems, Frames (K2).
2.5.5

Procedure when using orientational toolholders

Creating a toolholder
The number of toolholder data sets available in the NCK is defined by the machine data:
MD18088 $MN_MM_NUM_TOOL_CARRIER.
1. The value is calculated as follows:
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
MD18088 $MN_MM_NUM_TOOL_CARRIER =
"number of TO units" * "number of toolholder data sets of a TO unit"
MD18088/"number of TO units" is permanently allocated to each TO unit.
Detailed Description
2.5 Toolholder with orientation capability
2-99