HEIDENHAIN TNC 410 ISO Programming - Manual (Page 155)

HEIDENHAIN TNC 410, TNC 426, TNC 430 129
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Rounding corners G25
The G25 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.
Programming
U U U U Rounding-off radius: Enter the radius
Further entries, if necessary:
U U U U Feed rate F (only effective in G25 block)
Example NC blocks
N50 G01 G41 X+10 Y+40 F300 M3 *
N60 X+40 Y+25 *
N70 G25 R5 F100 *
N80 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 G25 block is effective only
in that block. After the G25 block, the previous feed rate
becomes effective again.
You can also use a G25 block for a tangential contour
approach, see “Tangential approach and departure,” page
124.
X
Y
40
40
R5
5
10
25
25