
B–63173EN–1/01
9. SPINDLE SPEED FUNCTION
329
GR3O
GR2OGR1O
10V
VC
VH
VL
ABC
Spindle speed
command
(S code input)
A×
Vmin
4095
C×
Vmax
4095
B×
Vmaxh
4095
A×
Vmaxl
4095
VC: Voltage corresponding to the upper limit of output value to spindle motor.
VH: Voltage corresponding to the upper limit of output value to spindle motor with high-speed gears (medium
speed gear for 3-stage gear)
VL: Voltage corresponding to the upper limit of output value to spindle motor at low-speed gear
Spindle motor speed command
(analog voltage output)
Fig. 9.3 (c) M type gear change B
When using this function, set the following parameters:
· Constant Vmax (Parameter No.3736) related to the upper limit of
spindle motor speed (rpm)
Upper limit of spindle motor speed (rpm)
Spindle motor speed (rpm) when the command voltage is 10V
Vmax = 4095×
· Constant Vmin (Parameter No. 3735) related to the lower limit of
spindle motor speed (rpm)
Vmin = 4095×
Lower limit of spindle motor speed (rpm)
Spindle motor speed (rpm) when the command voltage is 10V
· Constant Vmaxl (Parameter No. 3751) related to the upper limit of
spindle motor speed (rpm) with low-speed gears
Vmaxl = 4095×
Upper limit of spindle motor speed (rpm) with low-speed gears
Spindle motor speed (rpm) when the command voltage is 10V
· Constant Vmaxh (Parameter No. 3752) related to the upper limit of
spindle motor speed (rpm) with high-speed gears (medium-speed gear
for 3-stage gear)
Vmaxh = 4095×
Upper limit of spindle motor speed (rpm) with high-speed gears
(medium-speed gear for 3-stage gear)
Spindle motor speed (rpm) when the command voltage is 10V