Siemens SINUMERIK 840D sl Programming Manual page 355

Groove edges
For a cylinder surface transformation without groove wall correction, the edges of the groove
longitudinal to the rotary axis are only parallel if the groove width corresponds to the tool
diameter.
The groove edges of grooves that run parallel to the circumference (transverse grooves) are
not parallel at the beginning and end.
Offset contour normal OFFN (transformation type 513)
In order to mill grooves using
using the parameter
To avoid damage to the groove wall,
active. Furthermore, OFFN should also be ≥ the tool radius to avoid damage occurring to the
opposite side of the groove wall.
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
in the part program, the center line of the groove and
TRACYL,
half of the groove width is programmed.
OFFN
acts only when the tool radius compensation is
OFFN
Transformations
6.8 Kinematic transformation
355