108
6 Programming: Programming Contours
Corner Rounding RND
The RND function is used for rounding off corners.
The tool moves on an arc that is tangentially connected to both the
preceding and subsequent contour elements.
The rounding arc must be large enough to accommodate the tool.
ú Rounding-off radius: Enter the radius of the arc.
Further entries, if necessary:
ú
Feed rate F (only effective in 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 of the rounding
arc. 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 block. After the RND block, the previous feed
rate becomes effective again.
You can also use an RND block for a tangential contour
approach if you do not want to use an APPR function.
X
Y
40
40
R5
5
10
25
6.4 Path Contours — Cartesian Coordinates
Gkap6.pm6 30.06.2006, 07:04108
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