HEIDENHAIN TNC 620 Programming Station

Programming contours | Path contours — Cartesian coordinates
Rounded corners RND
The RND function creates rounding arcs at contour corners.
The tool moves on an arc that connects tangentially to both the
preceding and subsequent contour elements.
The rounding arc must be machinable with the called tool.
Rounding radius: Enter the radius, and if
necessary:
Feed F (effective only in the RND block)
5 L X+10 Y+40 RL F300 M3
6 L X+40 Y+25
7 RND R5 F100
8 L X+10 Y+5
In the preceding and subsequent contour elements,
both coordinates must lie in the plane of the rounding
arc. If you machine the contour without tool-radius
compensation, you must program both coordinates in the
plane.
The tool will not move to the corner point.
A feed rate programmed in the RND block is effective only
in that RND block. After the RND block, the previous feed
rate becomes effective again.
You can also use an RND block for a tangential contour
approach.
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HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022
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