HEIDENHAIN TNC 360 User Manual - Manual (Page 109)

5-25 TNC 360
5 Programming Tool Movements
Fig. 5.34: Smooth approach with RND
Fig. 5.33: Rounding radius R between G1 and G2
5.4 Path Contours – Cartesian Coordinates
2
G1
G2
1
R
R
E
R
S
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:
• Rounding corners
• Approaching and departing contours on a tangent
Input
• Radius of the arc
• Feed rate for RND
Prerequisite
On inside corners, the rounding arc must be large enough to accommo-
date the tool.
• In the preceding and subsequent 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.