
B–63503EN–1/01
9. SPINDLE SPEED FUNCTION
388
The output to the spindle in spindle serial output is a digital data.
Therefore assume the following relation for calculation:
Spindle analog output (voltage) 10V = Spindle serial output
(digital data) 4095.
The above calculation becomes as follows:
The value of Spindle output D:
(i) G96
D=
4095S
2πrR
R: Spindle speed (min
–1
) at maximum spindle motor speed (that is ,
spindle speed set by parameter No. 3741 to No. 3744)
S: Surface speed (m/min) specified by S
r: Radius value in the X-axis direction (m)
(ii)G97
D=
4095N
R
R: Spindle speed at maximum spindle motor speed (min
–1
)
N: Spindle speed given by S command (min
–1
)
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
Spindle Serial Output
Signal
Gear selection signal
(Input)
GR2, GR1 <G028#2, #1>
Constant surface speed
signal CSS <F002#2>
Signal address