FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
B–62764EN/01
10. SPINDLE SPEED FUNCTION
(S FUNCTION)
135
G96 mode G97 mode
Specify the surface speed in m/min
(or feet/min)
G97 command
Store the surface speed in m/min
(or feet/min)
Command for
the spindle
speed
Specified
The specified
spindle speed
(rpm) is used
Not specified
The surface speed (m/min or
feet/min) is converted to the
spindle speed (rpm)
Commands other than G96
G96 command
The specified
surface
speed is used
Command
for the surface
speed
The stored surface speed (m/min or
feet/min) is used. If no surface speed
is stored, 0 is assumed.
Specified
Not specified
The constant surface speed control is also effective during threading.
Accordingly, it is recommended that the constant surface speed control
be invalidated with G97 command before starting the scroll threading and
taper threading, because the response problem in the servo system may
not be considered when the spindle speed changes.
In a rapid traverse block specified by G00, the constant surface speed
control is not made by calculating the surface speed to a transient change
of the tool position, but is made by calculating the surface speed based on
the position at the end point of the rapid traverse block, on the condition
that cutting is not executed at rapid traverse.
D Surface speed specified
in the G96 mode
Restrictions
D Constant surface speed
control for threading
D Constant surface speed
control for rapid traverse
(G00)

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