HEIDENHAIN TNC 370 - Corner Rounding RND

5 Programming Tool Movements
L-
5.4 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 RND function is useful for:
-
L.
l Rounding corners
Fig. 5.34: Rounding radius R between Gl and G2
l Approaching and departing contours on a tangent
Input
l Radius of the arc
l Feed rate for RND
Prerequisite
On inside corners, the rounding arc must be large enough to accommo-
date the tool.
Fig. 5.35: Smooth approach with RND
l In the preceding and subsequent positioning blocks both coordinates should lie in the plane of the arc.
l The corner point @ is cut off by the ruunding arc and is not part of the contour.
l A feed rate prugrammed in the RND block is effective only in that block. After the RNR block the previous feed
rate becomes effective again.
L
TNC 370
5-25