Siemens Sinumerik 840D sl Programming Manual page 24

Drive commands
2.1 Interpolation commands
Selection of plane
Chamfer or fillet is possible only in the plane specified through the plane selection (G17, G18
or G19). These functions cannot be used on parallel axes.
Note
No chamfer/rounding is inserted, if
• No straight- or circular contour is available in the plane,
• a movement takes place outside the plane,
• The plane is changed or a number of blocks specified in the machine data, that do not
Coordinate system
After a block that changes the coordinate system (G92 or G52 to G59) or that contains a
command of reference point approach (G28 to G30), should not contain any command for
chamfering or rounding of corners.
Thread cutting
The specification of fillet in thread cutting blocks is not permissible.
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contain any information about traversing (e.g., only command outputs), is exceeded.
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling