Rounded Corners Rnd - HEIDENHAIN TNC 620 User Manual

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 rate F (effective only in the RND block)
Example NC blocks
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 on which
the corners are being rounded. If you machine the
contour without tool-radius compensation, you must
program both coordinates in the working 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 RNDG25 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 | 10/2015
Path contours  Cartesian coordinates
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