Helical Interpolation (G2/G3, Turn) - Siemens Sinumerik 840D sl Programming Manual

Position of the circle plane
The position of the circle plane depends on the active plane (G17-G19).
If the tangent of the previous block does not lie in the active plane, its projection in the active
plane is used.
If the start and end points do not have the same position components perpendicular to the
active plane, a helix is produced instead of a circle.
10.7

Helical interpolation (G2/G3, TURN)

The helical interpolation enables, for example, the production of threads or oil grooves.
With helical interpolation, two motions are superimposed and executed in parallel:
● A plane circular motion on which
● A vertical linear motion is superimposed.
Syntax
G2/G3 X... Y... Z... I... J... K... TURN=
G2/G3 X... Y... Z... I... J... K... TURN=
G2/G3 AR=... I... J... K... TURN=
G2/G3 AR=... X... Y... Z... TURN=
G2/G3 AP... RP=... TURN=
Meaning
G2:
G3:
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
10.7 Helical interpolation (G2/G3, TURN)
Travel on a circular path in clockwise direction
Travel on a circular path in counter-clockwise direction
Motion commands
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