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G25: corner rounding -26, Corner rounding with radius r – HEIDENHAIN TNC 407 (280 580) ISO Programming User Manual

Page 159

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TNC 426/TNC 425/TNC 415 B/TNC 407

5 - 2 6

5

Programming Tool Movements

Fig. 5.35:

Rounding radius R between G1 and G2

5.4

Path Contours – Cartesian Coordinates

2

G1

G2

1

R

R

E

5

2

G

ENT

G25: Corner rounding

The tool moves in an arc that is tangentially
connected to both the preceding and following
contour elements.

G25 is used to round corners.

Input

• Radius of the arc
• Feed rate for the arc

Prerequisite

The rounding radius must be large enough to
accommodate the tool.

In both the preceding and subsequent positioning blocks, both coordinates must lie in the plane of the arc.

The corner point

E

is not part of the contour.

A feed rate programmed in a G25 block is effective only in that block. After the G25 block, the previous feed
rate becomes effective again.

To program a tangential arc between two contour elements:

Select the corner-rounding function.

ROUNDING-OFF RADIUS

Enter the rounding radius, for example R = 10 mm.

Enter the feed rate for corner rounding, for example F = 100 mm/min.

Resulting NC block: G25 R 10 F 100

0

ENT

1

0

0

1

ENT