HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 238)

Programming: Programming contours
6.5 Path contours – Polar coordinates
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
Programming a helix
Always enter the same algebraic sign for the
direction of rotation and the incremental total angle
IPA. The tool may otherwise move in a wrong path
and damage the contour.
For the total angle IPA 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
Direction of rotation DR
Clockwise helix: DR–
Counterclockwise helix: DR+
Enter the radius compensation according to the
table
Example NC blocks: Thread M6 x 1 mm with 5 revolutions
12 CC X+40 Y+25
13 L Z+0 F100 M3
14 LP PR+3 PA+270 RL F50
15 CP IPA-1800 IZ+5 DR-