Rounded Corners Rnd - HEIDENHAIN TNC 620 User Manual

Programming Contours | Path contours  Cartesian coordinates

Rounded corners RND

The RND function rounds off contour corners.
The tool moves on an arc that is tangentially connected 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)
Example
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 corner point is cut off by the rounding arc and is not
part of the contour.
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.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
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