Specifications

11– 13
11
11.SELECTION
(11) Selection results
The HC-MF23 servo motor and MR-J2-20A servo amplifier are selected.
1) Electronic gear setting
2) During rapid feed
• Servo motor speed ......................No = 3000 [r/min]
• Input pulse train frequency........... fo = 100 [kpps]
3) Acceleration/deceleration time constant
Tpsa = Tpsd = 0.05[s]
(8) Acceleration and deceleration torques
Torque required for servo motor during acceleration
T
Ma =
(JL + JM) • No
9.55 x 10 • Tpsa
4
+ TL
= 1.7[N • m]
Torque required for servo motor during
deceleration
T
Md = = -1.2[N • m]
(9) Continuous effective load torque
Trms =
TMa • Tpsa + TL • tc + TMd • Tpsd
tf
222
= 0.41[N • m]
(10) Torque pattern
The torque required for the servo motor during deceleration must be lower than the servo
motor's maximum torque.
512
Parameter No. 3 Command pulse multiplication numerator (CMX)
Parameter No. 4 Command pulse multiplication denominator (CDV)
125
The continuous effective load torque must be lower than the servo motor's rated torque.
(JL + JM) • No
9.55 x 10 • Tpsd
4
+ TL
Torque
1.7
[N•m]
0.23
-1.2
Time[ s]
0.05 0.75 0.05
1.5
0.15