G02 Command (Clockwise Arc)

G02 cuts a circular arc in the clockwise direction at the programmed feed rate. The arc is defined either by a center offset (I, J) or by a radius (R).

Format

G02 X__ Y__ I__ J__ F__ (center offset)
G02 X__ Y__ R__ F__ (radius)

How it works

  • I and J are the distances from the start point to the arc center, along X and Y.
  • R gives the radius directly; use a negative R for arcs greater than 180 degrees on most controls.
  • The active plane (G17 / G18 / G19) sets which two axes the arc lies in.

Example

G02 X1.0 Y1.0 I0.5 J0.0 F10.0

FAQ

What do the I, J, and K values mean in a G02/G03 command? I, J, and K specify the incremental distance from the arc’s start point to its center point along X, Y, and Z, rather than the center’s absolute coordinates. Getting the sign wrong on I or J is one of the most common arc programming mistakes.

Related: G03 and plane selection.

Related Guides

Scroll to Top

The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.