Specifications

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CONCISE GUIDE FANUC 109
7.3 AXIS C
The axis C option is activated by functions M37 and G28 C0 (M237 and G28 A0 in the case of back
spindle option) whereas to leave this option and return to turning mode it is sufficient to program function
M36 (M236 for back spindle option ).
Example:
N26 …….
N27 M37 ; Enable axis C on main spindle
N28 G28 C0 ; Axis C reference
N29 T202 ; Call up tool
N30 G54 ; Activation of work origin
N31 M303 S1000 ; Rpm and direction of rotation activation
N32 G0 X… Z… C0 ; Axis C positioning
N33 G94 F500 ; Feed mm/min set.
N34 ……. ; Work with motor driven module
N35 …….
N36 M305 ; Stop rotation of rotating module
N37 M36 ; Disable axis C on main spindle
N38 G95 ; Feed mm/rev set.
N39 …..
The block containing function G28 C0 (or G28 A0) must not contain other instructions.
The axis C option can be used in three different ways:
• Real co-ordinates.
• Imaginary co-ordinates (G112).
• Cylindrical interpolation (G107).