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8. CALCULATION METHODS FOR DESIGNING
(9) Continuous effective load torque
Trms
tf
T
t
psa
T tc T
222
Ma L Md
t
psd
0.42[N m]
The continuous effective load torque must be lower than the servo motor's rated torque.
(10) Torque pattern
T
o
r
q
u
e
1.7
[N m]
0.23
1.2
Time[s]
0.05 0.75 0.05
1.5
0.15
(11) Selection results
The HC-MF23 servo motor and MR-J2-20A servo amplifier are selected.
(a) Electronic gear setting
CMX
8192
CDV
1000
(b) During rapid feed
Servo motor speed N
0 3000 [r/min]
(c) Acceleration/deceleration time constant
t
psa tpsd 0.05[s]