{"id":"gcode-g19","model_id":"G19","name":"LinuxCNC G19","summary":"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.","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."],"safety_notes":[],"sources":[{"url":"https://linuxcnc.org/docs/html/gcode/g-code.html#gcode:g17-g19.1","title":"G-Codes","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":3,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"instruction","spec":{"language":"gcode","code":"G19","group":"Plane Select","syntax":"G19","parameters":[],"dialect":"LinuxCNC","related":[],"standards":[]},"url":"https://machineschema.com/instruction/gcode-g19","license":"https://creativecommons.org/licenses/by/4.0/"}