Siemens SINUMERIK 840D sl Programming Manual page 357

Behavior at outer corners
A circle block with the radius of the cutter is always inserted at an outside corner.
The program commands ORIC or ORID can be used to define whether changes in
orientation programmed between blocks N1 and N2 are executed before the beginning of the
inserted circle block or at the same time.
If an orientation change is required at outside corners, this can be performed either at the
same time as interpolation or separately together with the path movement.
With ORID, the inserted blocks are executed initially without a path movement. The circle
block generating the corner is inserted immediately before the second of the two traversing
blocks.
If several orientation blocks are inserted at an external corner and ORIC is selected, the
circular movement is divided among the individual inserted blocks according to the values of
the orientation changes.
Rounding orientation with OSD and OST
When rounding with G642, the maximum variance for the contour axes and orientation axes
cannot vary greatly. The smaller tolerance of the two determines smoothing the shape
• the rounding movement or angle tolerance,
• the orientation characteristics
to a relatively severe extent without having to accept larger contour variances.
By activating OSD and OST, very small variances to the orientation characteristics can be
smoothed with a specified rounding length and angle tolerance without serious "large"
contour variances.
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
8.6 Tool orientation (ORIC, ORID, OSOF, OSC, OSS, OSSE, OSD, OST)
Tool offsets
8-35