Corner r ou nd ing – HEIDENHAIN TNC 407 (280 580) User Manual User Manual
Page 129
TNC 425/TNC 415 B/TNC 407
5-30
5
Programming Tool Movements
Fig. 5.38:
Rounding radius R between G1 and G2
0
1
e.g.
0
0
1
e.g.
RND
ENT
ENT
Path Contours - Cartesian Coordinates
Corner rounding RND
The tool moves in an arc that connects tangentially
both with the preceding and the subsequent
elements.
The TNC function is useful for rounding off corners.
Input
• Radius of the arc
• Feed rate for RND
Prerequisite
On inside corners, the rounding arc must be large
enough to accommodate the tool.
•
In the preceding and subsequent positioning blocks both coordinates should lie in the plane of the arc.
•
The corner point
E
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.
To program a tangential arc between two contour elements:
ROUNDING-OFF RADIUS R ?
Enter the rounding radius, for example R=10 mm.
FEED RATE ? F=
Enter the feed rate for the rounding radius, for example
F=100 mm/min.
Resulting NC block: RND R 10 F 100
2
G1
G2
1
R
R
E