Siemens SINUMERIK 840D sl Programming Manual page 357

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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

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