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P0 1 8 – HEIDENHAIN TNC 407 (280 580) User Manual User Manual

Page 136

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5-37

TNC 425/TNC 415 B/TNC 407

5

Programming Tool Movements

CT

5.5

Path Contours - Polar Coordinates

P

0

1

8

ENT

0

ENT

Circular path CTP with tangential connection

The tool moves on a circular path, starting tangentially (at

2

) from a

preceding contour element (

1

to

2

).

Input:

• Polar coordinate angle PA of the arc end point

E

• Polar coordinate radius PR of the arc end point

E

Fig. 5.42:

Circular path around a pole,
tangential connection

The transition points must be defined exactly.

The pole is not the center of the contour arc.

COORDINATES ?

Select polar coordinates.

POLAR COORDINATES-RADIUS PR ?

Enter the distance from the pole to the arc end point, for example
PR = 10 mm.

POLAR COORDINATES-ANGLE PA ?

Enter the angle from the reference axis to PR, for example PA = 80°.

If necessary, enter:

Radius compensation R
Feed rate F
Miscellaneous function M

Resulting NC block: CTP PR +10 PA +80

CC

PA

PR

E

2

1