Table of Contents
Advertisement
11.SELECTION
(8) Acceleration and deceleration torques
Torque required for servo motor during acceleration
(J
+ J
) • N
L
M
o
T
=
Ma
4
9.55 x 10 • T
Torque required for servo motor during
deceleration
(J
+ J
) • N
L
M
T
=
Md
4
9.55 x 10
• T
The torque required for the servo motor during deceleration must be lower than the servo
motor's maximum torque.
(9) Continuous effective load torque
2
T
=
T
• T
rms
Ma
psa
The continuous effective load torque must be lower than the servo motor's rated torque.
(10) Torque pattern
1.7
[N•m]
0.23
0.05
-1.2
(11) Selection results
The HC-MF23 servo motor and MR-J2-20A servo amplifier are selected.
1) Electronic gear setting
Parameter No. 3
Command pulse multiplication numerator (CMX)
Parameter No. 4
Command pulse multiplication denominator (CDV)
2) During rapid feed
• Servo motor speed ......................N
• Input pulse train frequency........... f
3) Acceleration/deceleration time constant
T
= T
= 0.05[s]
psa
psd
= 1.7[N • m]
+ T
L
psa
o
+ T
= -1.2[N • m]
L
psd
2
2
= 0.41[N • m]
+ T
• tc + T
• T
L
Md
psd
t
f
0.75
0.05
1.5
o
o
11– 13
Time[s]
0.15
512
125
= 3000 [r/min]
= 100 [kpps]
11
Advertisement
Table of Contents
