
B-63323EN-1/03 9.SPINDLE FUNCTION
- 793 -
Note
NOTE
1 The S value specified in G96 mode is stored even
when G97 mode is set. The S value is restored
when G96 mode is set again.
G96 S50: 50 m/min or 50 feet/min
G97 S1000: 1000 min
-1
G96 X3000: 50 m/min or 50 feet/min
2If S (min
-1
) is not specified in a G97 block upon
switching from G96 mode to G97 mode, the last
speed set in G96 mode is used as the S value for
G97 mode.
N10 G97 S800: 800 min
-1
N20 G96 S100: 100 m/min or 100 feet/min
N30 G97: X min
-1
X is the speed in the block immediately before N30.
This means that, upon switching from G96 mode to
G97 mode, the spindle speed remains as is. When
the mode is first changed from G97 mode to G96
mode, S = 0 m/min is set if no S value (min
-1
) is
specified in the G96 block.
3 In the machine lock state, a constant surface speed
is calculated according to the change in program
coordinates even when the machine does not move.
4 Constant surface speed control is enabled even for
threading. If threading is performed in G96 mode,
however, the spindle speed changes, and the tool
feedrate also changes accordingly, resulting in a
change in the servo delay. This can result in an
incorrect thread pitch being created.
Reference item
Series15i/150i-MA Operator’s Manual
(Programming)
(B-63324EN)
II-9.2 Constant surface speed
control