
B–63503EN–1/01
9. SPINDLE SPEED FUNCTION
364
GR30
GR20GR10
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 (min
–1
)
Upper limit of spindle motor speed (min
–1
)
Spindle motor speed (min
–1
) when the command voltage is 10V
Vmax = 4095×
· Constant Vmin (Parameter No. 3735) related to the lower limit of
spindle motor speed (min
–1
)
Vmin = 4095×
Lower limit of spindle motor speed (min
–1
)
Spindle motor speed (min
–1
) when the command voltage is 10V
· Constant Vmaxl (Parameter No. 3751) related to the upper limit of
spindle motor speed (min
–1
) with low-speed gears
Vmaxl = 4095×
Upper limit of spindle motor speed (min
–1
) with low-speed gears
Spindle motor speed (min
–1
) when the command voltage is
10V
· Constant Vmaxh (Parameter No. 3752) related to the upper limit of
spindle motor speed (min
–1
) with high-speed gears (medium-speed
gear for 3-stage gear)
Vmaxh = 4095×
Upper limit of spindle motor speed (min
–1
) with high-speed gears
(medium-speed gear for 3-stage gear)
Spindle motor speed (min
–1
) when the command voltage is 10V