# Simple helical interpolation

With simplified helical programming, no pitch is defined, only a target point. Depending on the target point the result is a helical motion with maximum one complete rotation.

Syntax example for G17 plane:
G02 | G03 X.. Y.. Z.. I.. J.. | R..

G02 | G03 | Circular interpolation CW / CCW
X.. Y.. | Target point in XY plane in [mm, inch]
Z.. | Target point on helical axis perpendicular to XY plane in [mm, inch]
I.. J.. | Position of circle centre point of interpolation in XY plane (I in X, J in Y) in [mm, inch], according to G161/G162
R.. | Radius of interpolated circle (alternative to I,J) in [mm, inch]

Syntax according to selected interpolation plane:

Plane | Interpolation type | Target point in plane | Target point on helical axis | Centre point/radius
G17 | G02/G03 | X..Y.. | Z.. | I..J../R
G18 | G02/G03 | Z..X.. | Y.. | K..I../R
G19 | G02/G03 | Y..Z.. | X.. | J..K../R

## Programing Example

Helical interpolation in the XY plane counter-clockwise

The following helix is travelled:

Starting point a: X-10 Y0 Z0

Target point b: Z20

Helix centre point I, J: Zero point

N10 G17 G90 X-10 Y0 Z0 F500 G161

N20 G03 I0 J0 Z20

Helical interpolation in the XY plane counter-clockwise