HEIDENHAIN TNC 640 User Manual page 314

7
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.
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: 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-
314
Programming Contours | Path contours – Polar coordinates
After entering the angle, specify
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017