Tool Offset Inside/Outside Corners And Intersection Procedure (G450/G451) - Siemens SINUMERIK 840D sl Programming Manual

Tool offsets
9.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
9.5.5 3D tool offset Inside/outside corners and intersection procedure (G450/G451)
Function
Inside corners/outside corners
Inside and outside corners are handled separately. The terms inner corner and outer corner
are dependent on the tool orientation.
When the orientation changes at a corner, for example, the corner type may change while
machining is in progress. Whenever this occurs, the machining operation is aborted with an
error message.
Syntax
G450
G451
Meaning
G450
G451
Further Information
Intersection procedure for 3D compensation
With 3D circumferential milling, G code
intersection of the offset curves can be approached. Up to SW 4 a circle was always inserted
at the outside corners. The intersection procedure is especially advantageous for 3D
programs typically generated by CAD. These often consist of short straight blocks (to
approximate smooth curves), where the transitions between adjacent blocks are almost
tangential.
412
Transition circle (tool travels round workpiece corners on a circular path)
Intersection of equidistant paths (tool backs off from the workpiece corner)
is now evaluated i.e. the point of
G450/G451
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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