HEIDENHAIN TNC 310 (286 140) - Manual (Page 86)

74 6 Programming: Programming Contours
6.4 P
ath Cont
ours
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Car
tesian Coor
dinat
es
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.
ú Feed rate for rounding the corner.
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.
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 P
ath Cont
ours
—
Car
tesian Coor
dinat
es