B&K Reference 125.5 Series II Especificaciones descargar pdf (Pagina 38)

Servomotor Selection Example

Speed Diagram

Speed

Effective Torque at Motor Shaft

Effective Load Moment of Inertia at Motor Shaft

Load Running Power

Mechanical Specifications

Time (s)

Reference pulse

Load speed

Speed

(m/min)

1.2

ta tc td ts

Linear motion unit

Ball screw

Coupling

Servomotor

•

Load axis speed

0.005

2πR

9.8

•

Motor speed

Because of direct coupling, the gear ratio is 1/R = 1/1.

Then,

R=3000

1=3000

(

min

-1

)

2π

0.9

0.2

9.8

0.005

•

Positioning frequency

•

Traveling distance

•

Positioning interval

•

Friction coefficient

•

Combined efficiency

= 15m/min

= 80kg

= 0.8m

= 0.016m

= 0.005m

= 0.3kg

= 0.03m

40 times/min

= 0.25m

= 1.2

S max.

= 0.2

= 0.9

(

90%

)

60 60

2π

3000

0.139

= 3000

(

min

-1

)

= = = 0.139

(

)

•

Linear motion

•

Ball screw

•

Coupling

JL1

= 1.25

-4

(

kg m

)

= 80

= 0.507

-4

(

kg m

)

2πR

0.005

= ρ

7.87

0.8

(

0.016

)

= 0.405

-4

(

kg m

)

0.3

(

0.03

)

= 0.338

-4

(

kg m

)

2π

43.7

(

)

60 60

0.5

Where acceleration time (

) = deceleration time (

) and

setting time (

) = 0.1 s when the filter setting of the FIL rotary switch is 0.

Cycle time

= = = 1.5 (s)

—

= 1.2

—

0.1

—

= 0.1 (s)

—

= 1.2

—

0.1

—

0.1

—

0.1 = 0.9 (s)

Constant-speed time :

Acceleration time :

Selection of Servomotor Size

ππ

•

Load speed

•

Mass of linear motion unit

•

Ball screw length

•

Ball screw diameter

•

Ball screw lead

•

Coupling mass

•

Coupling outer diameter

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 44 45 46

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B&K Reference 125.5 Series II Especificaciones Pagina 38

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