1. G Function Description
1.2.48 G96/G97: CONSTANT LINEAR VELOCITY
CONTROL ON SURFACE
Command form:
G96 S ；constant linear velocity control on surface: ON
G97 S ；constant linear velocity control on surface: OFF
Description:
G96 specify the surface speed (relative speed between the tool and
workpiece), G97 command can cancel G96 command, it also can specify
spindle speed；in performance, use the tool in different radius, but we need
surface speed in a fixed value, we can use G96 S to control surface
speed；if you do not mind how big is the diameter of tool when perform, and
we fix the spindle speed, we can use G97 S to control spindle speed,
follow the formula:
V DN
1000
V: surface speed, it can use G96 to specify to fixed value, unit M/MIN
or FEET/MIN.
D: diameter of tool, unit mm
N: spindle speed, it can use G97 to specify to fixed value, unit RPM.
Example 1:
spindle surface speed fixed:
G92 S2000; //use G92 to restrict spindle max revolution
G96 S130 M03; //for interpolation speed is 130 m/min
Notes: G92 always used with G96, it restricts max revolution of
spindle, example is tool NO.2 diameter 10mm, then:
N 1000130 4140rpm
10
Through G92 the spindle max revolution is 2000rpm, in order to
prevent spindle revolution too big、centrifugal too big, workpiece is not tight
with the machine, so some accident will happen；so we use G92 to match
130
    "