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HEIDENHAIN TNC 620 (73498x-02) ISO programming User Manual

Page 200

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Programming: Programming contours

6.5

Path contours – Polar coordinates

6

200

TNC 620 | User's Manual for DIN/ISO Programming | 5/2013

Programming a helix

Always enter the same algebraic sign for the
direction of rotation and the incremental total angle
G91 H. The tool may otherwise move in a wrong
path and damage the contour.

For the total angle

G91 H you can enter a value of

-99 999.9999° to +99 999.9999°.

Polar coordinates angle: Enter the total angle
of tool traverse along the helix in incremental
dimensions.

After entering the angle, specify

the tool axis with an axis selection key.

Coordinate: Enter the coordinate for the height of
the helix in incremental dimensions

Enter the radius compensation according to the
table

Example NC blocks: Thread M6 x 1 mm with 5 revolutions

N120 I+40 J+25 *
N130 G01 Z+0 F100 M3 *
N140 G11 G41 R+3 H+270 *
N150 G12 G91 H-1800 Z+5 *