Yaskawa SGDH Linear Sigma Series Bedienungsanleitung Seite 378

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Seitenansicht 377
12 Appendix
12-2
12.1 Linear Servomotor Capacity Selection Examples
(1)
Speed Diagram
(2) Force Under Constant Load
(3) Force at Load Acceleration
(4) Linear Servomotor Provisional Selection
(a) Selecting Conditions
(b) Specifications of the Provisionally Selected Linear Servomotor and SERVOPACK
• Rated output: 400 (W)
• Rated speed: 1500 (mm/s)
• Rated force: 147 (N)
• Instantaneous peak force: 440 (N)
• Linear servomotor coil assembly mass: W
M
= 0.82 (kg)
Load speed: L =120 m/min
Workpiece mass: WW = 1 kg
Table mass: WT = 2 kg
Feeding times: n = 120 times/min
Feeding distance: = 0.76 m
Feeding time: tm = 0.4 s max.
Acceleration time: ta = 0.02 s
Friction coefficiency: = 0.2
μ
υ
t
c
t
a
t
d
(m/min)
Speed
Time (s)
60
0.4
t
L
n
15
t = = =0.5 (s)
tc = 0.4 (0.02 × 2) = 0.36 (s)
where ta = td
60
120
υ
FL = 9.8 x μ x (WW + WT) = 9.8 × 0.2 × (1+2) = 5.88 (N)
FP = (WM + WT) x + FL = (1+2) × + 5.88 = 305.88 (N)
60 x ta
L
υ
60 × 0.02
120
y FP Linear servomotor maximum force
The following models satisfy the conditions.
y SGLGW-60A253BP linear servomotor coil assembly
y SGDH-04AE SERVOPACK
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