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Swiss (Citizen Star) M-code list

36 M-codes. Pick a code for the format, the addresses, an example program and what to watch out for.

Machine builders set many M codes, and they change by model and options. Check the M code list for your machine.

Code	Meaning	Machine
M00	Program stop	Lathe
M01	Optional stop	Lathe
M02	End of one cycle (Citizen)	Lathe
M03	Main spindle forward	Lathe
M04	Main spindle reverse	Lathe
M05	Main spindle stop	Lathe
M06	Main chuck close (Citizen)	Lathe
M07	Main chuck open (Citizen)	Lathe
M10	Back knock-out on (Citizen) / Collet close (Star)	Lathe
M11	Back knock-out off (Citizen) / Collet open (Star)	Lathe
M15	Back spindle chuck close (Citizen)	Lathe
M16	Back spindle chuck open (Citizen)	Lathe
M18	C axis on (Citizen)	Lathe
M20	C axis off (Citizen) / One cycle stop (Star)	Lathe
M23	Back spindle forward (Citizen)	Lathe
M24	Back spindle reverse (Citizen)	Lathe
M25	Back spindle stop (Citizen)	Lathe
M30	Program end and reset (Star)	Lathe
M50	Pick-off check (Citizen)	Lathe
M52	Coolant on (Citizen)	Lathe
M53	Coolant off (Citizen)	Lathe
M56	Part count (Citizen)	Lathe
M72	Back spindle air blow on (Citizen)	Lathe
M73	Back spindle air blow off (Citizen)	Lathe
M77	Wait for spindle sync (Citizen)	Lathe
M80	Rotary tool 1 forward (Citizen)	Lathe
M81	Rotary tool 1 reverse (Citizen)	Lathe
M82	Rotary tool 1 stop (Citizen) / Spindle sync on (Star)	Lathe
M83	Spindle sync off (Star)	Lathe
M88	Interference check off (Citizen)	Lathe
M89	Interference check on (Citizen)	Lathe
M98	Subprogram call	Lathe
M99	Subprogram return or program loop	Lathe
M123	Back spindle high torque limit on (Citizen)	Lathe
M124	Back spindle torque limit off (Citizen)	Lathe
M200	Waiting M code (Star)	Lathe

Take the list to the machine. The app searches every code by number or shop word and decodes a whole program line by line.