Frame Generation According To Tool Orientation (Toframe, Torot, Parot) - Siemens SINUMERIK 840D sl Programming Manual

Coordinate transformations (frames)

12.8 Frame generation according to tool orientation (TOFRAME, TOROT, PAROT)

12.8 Frame generation according to tool orientation (TOFRAME, TOROT,
PAROT)
Function
TOFRAME generates a rectangular frame whose Z axis coincides with the current tool
orientation. This means that the user can retract the tool in the Z direction without risk of
collision (e.g. after a tool break in a 5-axis program).
The position of the X and Y axes is determined by the setting in machine data MD21110
$MC_X_AXES_IN_OLD_X_Z_PLANE (coordinate system with automatic frame definition).
The new coordinate system is either left as generated from the machine kinematics or is
turned around the new Z axis additionally so that the new X axis lies in the old Z/X plane
(see machine manufacturer's specifications).
The resulting frame describing the orientation is written in the system variable for the
programmable frame ($P_PFRAME).
TOROT only overwrites the rotation component in the programmed frame. All other
components remain unchanged.
TOFRAME and TOROT are designed for milling operations in which G17 (working plane X/Y) is
typically active. In the case of turning operations or generally when G18 or G19 is active,
however, frames are needed where the X or Y axis matches the orientation of the tool. These
frames are programmed with the TOFRAMEX/TOROTX or TOFRAMEY/TOROTY commands.
PAROT aligns the workpiece coordinate system on the workpiece.
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Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals