Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 9.SPINDLE SPEED FUNCTION (S FUNCTION)
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9.2 CONSTANT SURFACE SPEED CONTROL (G96, G97)
Specify the surface speed (relative speed between the tool and
workpiece) following S. The spindle is rotated so that the surface
speed is constant regardless of the position of the tool.
Format
- Constant surface speed control command
G96Sxxxxx ;
Surface speed (m/min or feet/min)
Note :This surface speed unit may change according to
machine tool builder’s specification.
- Constant surface speed control cancel command
G97Sxxxxx ;
Spindle speed (min
-1
)
Note :This surface speed unit may change according to
machine tool builder’s specification.
- Constant surface speed controlled axis command
G96P ¿; P0 : Axis set in the parameter (No. 5884)
P1 : X axis CP2 : Y axis CP3 : Z axis CP4 : U axis
P5 : V axis CP6 : W axis CP7 : A axis CP8 : B axis
P9 : C axis
- Clamp of maximum spindle speed
G92S_ ;
The maximum spindle speed (min
-1
) follows S.
Explanations
- Constant surface speed control command (G96)
G96 (constant surface speed control command) is a modal G code.
After a G96 command is specified, the program enters the constant
surface speed control mode (G96 mode) and specified S values are
assumed as a surface speed. A G97 command cancels the G96 mode. S
(surface speed) commands in the G96 mode are assumed as S = 0 (the
surface speed is 0) until M03 (rotating the spindle in the positive
direction) or M04 (rotating the spindle in the negative direction)
appears in the program.

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