
B–63523EN–1/03
9. SPINDLE SPEED FUNCTION
1055
Z
X
N3
N4
In this program, block N2 issues a constant surface speed control
command (G96), a surface speed command (S12 m/min), and a
feed–per–revolution command (G95). Block N3 causes the CNC to
change the spindle speed specification from 76.4 min
–1
to 191 min
–1
so
as to maintain a constant surface speed during movement to X = 20.
Meanwhile, the feed–per–revolution speed is changed according to the
changed spindle speed specification, and used for movement along the
feed axis. However, the specified spindle speed is clamped to the upper
limit to the spindle speed specification (for the first spindle, using
parameter No. 3772). In the above program, the feed–per–revolution
speed command F10 in block N3 corresponds to an actual speed of 764
(mm/min) to 1910 (mm/min).
Refer to section 9.3 “Spindle Speed Control”.
[Classification] Output signal
[Function] This signal indicates that constant surface speed control is in progress.
[Output condition] “1” indicates that constant surface speed control mode (G96) is in
progress, while “0” indicates it is not.
#7 #6 #5 #4 #3 #2 #1 #0
F002 CSS
Signal
Gear selection signal
(Input)
GR2, GR1 <G028#2, #1>
Constant surface speed
signal CSS <F002#2>
Signal address