G3 performs a counter‑clockwise circular or arc movement. It is identical to G2 except for the direction of rotation.

{Attention Attention for Klipper users, it is recommended to disable this option. Klipper does not benefit from arc commands, as these are split back into line segments by the firmware. This results in a reduction in surface quality, as line segments are converted into arcs by the slicer and then converted back into line segments by the firmware.}

Two ways to define the arc:

1. Using I/J/K (center‑offset method)

• I = X offset to arc center

• J = Y offset

• K = Z offset

2. Using R (radius method)

• R = radius of the arc

Common parameters:

Codesample

G3 X60 Y40 I-10 J0 E0.4 F1200

G3 X60 Y40 R15 E0.4