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4 Setup
MITSUBISHI CNC
<Relation of spindle limit rotation speed and spindle maximum rotation speed>
The spindle rotation speed which can be attained at the spindle motor's maximum rotation speed is set for the limit
rotation speed (slimt). This value is obtained by multiplying the gear ratio on the spindle motor maximum rotation
speed (SP026). Set the maximum rotation speed (smax) when the rotation speed is to be limited according to the
machine specifications, such as the spindle gear specifications. Up to four value can be set for gear changeover.
<Synchronous tapping multi-step acceleration/deceleration control parameter>
The acceleration/deceleration control can be set up to three steps in synchronous tapping control to carry out an
optimal acceleration/deceleration control in accordance with the spindle motor characteristics whose output torque
steps down when exceeding the base rotation speed.
Set the inclination for 2nd step or subsequent steps when the maximum rotation speed exceeds the base rotation
speed during synchronous tapping control.
When the inclination is not set after 2nd step or it is higher than that of 1st step, the acceleration/deceleration
control is executed with the same inclination as the 1st step for all the rotation speed.
SP026
0
smax
slimt1 smax2 smax
(
n
)
slimt2 slimt
(
n
)
1
Spindle motor rotation speed
(
r/min
)
S
p
indle rotation s
p
eed
(
r/min
)
2000
400
0
600
0
800
0
taps21=3000
stap1=1500
0
0
1000
2000
0
3000
4000
stapt1=300
tapt21=900
tapt31=5000
slimit1=10000
10000
Spindle rotation speed [r/min]
Time [ms]