LinuxCNC G19

G19 is the plane-selection G-code that sets the active plane to YZ. It belongs to the G17-G19.1 plane-select group in LinuxCNC. The selected plane is used by arc moves and canned cycles.

Source checked3/3 values · 2026-10-26

Specification

1 source

Language	gcode
Code	G19
Group	Plane Select
Syntax	G19
Dialect	LinuxCNC

Study notes

In the YZ plane, G2/G3 center-format arcs use J as the Y offset and K as the Z offset.
Plane selection affects G2/G3 arc behavior and G81-G89 canned cycles.
The document recommends including a plane selection in the preamble of each G-code file.