Siemens Sinumerik 840D sl Programming Manual page 312

Coordinate transformation (FRAMES)
5.6 Frame calculation from three measuring points in space (MEAFRAME)
Example of concatenating frames
Chaining of MEAFRAME for offsets
The MEAFRAME( ) function provides an offset frame. If this offset frame is concatenated with
a set frame $P_UIFR[1] that was active when the function was called, e.g., G54, one
receives a settable frame for further conversions for the procedure or machining.
Concatenation with ADDFRAME
If you want this offset frame in the frame chain to apply at a different position or if other frames
are active before the settable frame, the ADDFRAME( ) function can be used for chaining into
one of the channel basic frames or a system frame.
The following must not be active in the frames:
• Mirroring with MIRROR
• Scaling with SCALE
The input parameters for the setpoints and actual values are the workpiece coordinates.
These coordinates must always be specified
• metrically or in inches (G71/G70) and
• with reference to the radius (DIAMOF)
in the basic system of the controller.
312
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Job planning