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G03 Circular interpolation counterclockwise

Haas NGC G-code · Mill, Lathe

On mills: Circular interpolation counterclockwise

Cuts a counterclockwise arc in the selected plane at feed rate. It works the same way as G02 with I J K or R, and a Z move makes a helix.

Format

Addresses

How it works

Modal, motion group 01.

Example program

The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

• With a right hand cutter and M03, G03 around an inside bore is climb milling.
• A full circle needs I J K, not R.

On lathes: Circular interpolation counterclockwise

Cuts a counterclockwise arc to the end point. Give the arc center with I and K or the radius with R. On an OD going toward the chuck it makes a convex radius.

Format

Addresses

How it works

Modal, group 01.

Example program

The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

• Check arc direction in Graphics before the first cut.
• The start and end radius must match or the control alarms.
• Use tool nose comp G41 or G42 so arcs come out at the true size.

Related codes

G02 · G17 · G12 · G13 · G01 · G18

G03 on other controls

The same number can mean something different on another control.