SMC Networks MY3 Series Bedienungsanleitung

CAT.ES20-165 B

Mechanically Jointed

Rodless Cylinders

Rubber

bumper

Air

cushion

Stroke

adjusting

unit

Side

support

25 40 63

Bore size (mm)

Made to

Order

Note) Except the MY3A

Long stroke

(-XB11)

Helical insert

threads (-X168)

Holder mounting

bracket Note)

(-X416, X417)

Copper-free

(20-)

Floating

bracket

MY3A

MY3B

Series Type Piping

type

Basic standard

type

MY3M Slide bearing

type

Basic short

type

Centralized

piping

Standard

piping

Series VariationsSeries VariationsSeries Variations

Series MY3B

Series MY3M

Series MY3A

Basic standard type (Air cushion)

Series MY3B

Slide bearing type (Air cushion)

Series MY3M

Basic short type (Rubber bumper)

Series MY3A

MY3A3B.qxd 06.2.17 9:13 AM Page 1

Series

MY3A

ø16

110

ø25

150

ø40

240

ø63

320

MY3B

MY3M 122 178 276 356

MY1B

MY1M 160 220 340 460

(mm)

Series

MY3A

MY3B

ø16 ø25 ø40 ø63

MY1B

27 37 54 84

37 54 84 116

MY1M 40 54 84 130

MY3M 33 45 63 93

(mm)

MY1B/MY1M (with air cushion)

MY3A (with rubber bumper)

MY1M

High functionality with reduced height and length

Overall length (Z) reduced by

140

mm at the maximum

Overall Length (Z) Weight

Height (H) reduced by

% at the maximum

Weight reduced by

% at the maximum

Series

MY3A

MY3B

MY1B

MY1M

MY3M

ø16

0.34

0.35

0.73

ø25

0.99

1.09

1.57

ø40

2.95

3.08

4.41

ø63

8.26

8.99

14.5

0.45

0.91

1.32

2.12

3.65

7.00

9.99

18.9

(kg)

Height (H)

Overall length (Z + Stroke)

∗ At 100 mm stroke

MY3B

MY3BMY3B

MY3B

Basic standard type

(Air cushion)

Mechanically Jointed Rodless Cylinders

Series MY3

MY3A

Basic short type

(Rubber bumper)

MY3B/MY3M (with air cushion)

Loading Capacity

200

180

160

140

MY3M

MY3A

MY3B

MY3M

MY3A

MY3B

120

100

16 25 40 63 16 25

Bore size (mm) Bore size (mm)

Allowable moment (Nm)

Load weight (kg)

40 63

NEW

Work pieces can be loaded

directly on the work table

due to the integrated guide.

MY1B MY3A/3BMY3A/3B MY3MMY3M

Height (H)

SMC

MY3M

MY3MMY3M

MY3M

Slide bearing type

(Air cushion)

Features 1

MY3A3B.qxd 06.2.17 9:13 AM Page 2

Auto Switch

Stroke Adjusting Unit

Side Support

The cylinder tube can be fixed from the upper or lower side.

(Page 15, 27)

Centralized Piping

Can be mounted on both sides

from the front direction.

(MY3B/3M)

(MY3A/3B)

Floating Bracket

Easy connection with external guide. Vertical and lateral mounting is possible. (Page 16)

Integrated piping in the

head cover is possible.

(Refer to the back of

page 6.)

Side support

Auto switch

Positioning cushion mechanism

Air cushion

(MY3B/3M)

Passage for

centralized piping

The uniquely designed piston

shape enables reduction of

the height and length as well

as practical arrangement of

the common piping passages,

cushion mechanism and posi-

tioning mechanism. This has

achieved drastic miniaturiza-

tion and weight reduction.

Features 2

MY3A3B.qxd 06.2.17 9:13 AM Page 3

Guideline for Tentative Model Selection

Series Type Note

Basic short type

Basic standard type

Slide bearing type

MY3A

MY3B

MY3M

Stroke accuracy

Guideline for tentative model selection

Use of external guide

Direct loaded Table accuracy

Generally combined with a separare

guide making it, by length, more compact.

Generally combined with a separare

guide, when stroke accuracy is required.

Mounting a work piece directly on the

product, when stroke accuracy is required.

Selection Flow Chart

When an external guide is used, the selection confirmation of the guide capacity should follow the selection procedure

of the external guide.

The MY3 series allow direct load application within the allowable range for the built-in guide. The payload in this case

will vary depending on the driving speed and the mounting orientation of the cylinder. Please refer to the flow below and

confirm the selection. (For more detailed description of the selection flow, please refer to the instruction manual.)

∗ When using an external cushioning unit, we recommend installing a suitable unit near the load’s

center of gravity.

It is possible to select all models of mechanically jointed rodless cylinder (the MY3 series) according

to the procedure indicated above.

Refer to the separate instruction manual for further explanation, and please consult with SMC

regarding any questions.

Tentative selection of cylinder model

MY3A:Basic short type

MY3B:Basic standard type

MY3M:Slide bearing type

Operating conditions

Load weight

(kg)

Speed

(mm/s)

Operating pressure

(MPa)

Mounting

direction:

Examine the cushioning

mechanism at stroke end.

Built-in cushion

stroke adjusting

unit

External

shock

absorber

Examine the auto switch

mounting (model).

Model

selected

OK OK

Re-examine the operating conditions.

Select larger

cylinder size.

Change the

guide type.

NG NG

In case of the MY3A

and MY3B only

Series MY3

Model Selection 1

The following are steps for selecting the MY3 series which is best suited to your application.

Determination

of load weight

and allowable

moment

Select the

different guide type.

∗Please refer to the informa-

tion by the guide

manufacturer.

Most suitable Suitable Usable Not recommended

Note) The table accuracy means the amount of table deflection when a moment is applied.

Front matter 1

MY3A3B.qxd 06.2.17 9:13 AM Page 4

Maximum operating speed

Front matter 2

Model Selection

Series MY3

Note 1) The shock absorber must meet the conditions mentioned on page 7.

Note 2) As the external shock absorber, a unit with appropriate capacity and features should be installed close to the load center of gravity.

Note 3) Use the stroke adjusting unit of the MY3B series with an external guide.

Note 4) Shown below are the details of the maximum operating speed for the stroke adjusting unit.

How to mount

a load

Direct loaded

Use of external

guide

Rubber bumper

Air cushion

Shock absorber

External shock

absorber Note 1)

Rubber bumper

Air cushion

Shock absorber

External shock

absorber Note 1)

Stroke positioning Shock absorber

1000 1500

(mm/s)

500

MY3A

MY3B

MY3M

MY3A MY3B

Cylinder stroke end

Stroke adjusting unit

(Option: L, H unit)

External stopper

Cylinder stroke end

Stroke adjusting unit

(Option: L, H unit)

External stopper

MY3M

MY3A

MY3B

MY3A MY3B

Note 2)

Note 4)

Note 2)

Note 3)

Note 4)

Outside the fine stroke adjustment range means that when a holder mounting bracket (X416, X417) is used.

Holder mounting bracket →Refer to page 34, 35.

MY3 Series, Maximum Operating Speed when Using the Stroke Adjusting Unit Unit: mm/s

Series

MY3B

MY3M

Bore size (mm)

25, 40, 63

16, 25, 40, 63

Stroke adjustment range

L unit

H unit

L, H unit

Inside the fine stroke adjustment range

800

1000

1500

Outside the fine stroke adjustment range

500

800

MY3A3B.qxd 06.2.17 9:13 AM Page 5

Front matter 3

Series MY3

Types of Moment Applied to Rodless Cylinders

Multiple moments may be generated depending on the mounting orientation, load and position of the center of gravity.

Calculation of Guide Load Factor

Maximum load weight (1), static moment (2), and dynamic moment (3) (at the time of impact with stopper) must be examined for the selection calculations.

∗To evaluate, use υa (average speed) for (1) and (2), and υ(impact speed υ= 1.4υa) for (3). Calculate m max for (2) from the maximum allowable load graph (m1, m2, m3 )

and Mmax for (2) and (3) from the maximum allowable moment graph (M1, M2, M3).

2. Reference formulas [Dynamic moment at impact]

Use the following formulas to calculate dynamic moment when taking stopper impact into consideration.

m:Load weight (kg)

F:Load (N)

FE:

Load equivalent to impact (at impact with stopper) (N)

υa: Average speed (mm/s)

M:Static moment (N •m)

υ= 1.4υa (mm/s) FE= 1.4υa x δx m •g

ME=

—

•FE•L1= 4.57υaδm L1 (N •m)

Note 4) 1.4υaδ is a dimension less coefficient for calculating impact force.

Note 5) Average load coefficient = :

This coefficient is for averaging the maximum load moment at the time of stopper impact according to service life calculations.

3. For detailed selection procedure, please refer to pages 2, 3, 18, 19.

Coordinates and Moments

M3: Yawing

xM2: Rolling

M1: Pitching

Horizontal

mounting

Wall

mounting

Ceiling

mounting

m3x g

m1x g

m2x g

Vertical

mounting

g: Gravitational acceleration

Note)

is a mass movable by thrust. Use 0.3 to 0.7 times the thrust

(differs depending on the operating speed) as a guide for actual use.

Mounting direction

Static load m

Horizontal

Ceiling

Wall

m1x gx X

m1x gx Y

—

m2x gx X

m2x gx Y

—

m3x gx Z

m3x gx X

m4x gx Z

—

m4x gx Y

Vertical

υa

Mounting direction

Dynamic load

Horizontal Ceiling Wall Vertical

Note) Regardless of the mounting orientation, dynamic moment is

calculated with the formulae above.

Dynamic moment M2E will not be generated.

1.4υax δx mnx g

x FEx Z

x FEx Y

M1E

M2E

M3E

Load Weight and Static Moment

g: Gravitational acceleration

υa: Average speed

δ: Bumper coefficient

Note 1) Moment caused by the load, etc., with cylinder in resting condition.

Note 2) Moment caused by the impact load equivalent at the stroke end (at the time of impact with stopper).

Note 3) Depending on the shape of the work piece, multiple moments may occur. When this happens, the sum of the load factors (Σα) is the total of all such moments.

M1E

υa

M3E

Dynamic Moment

mnx g

m4x g

Static

moment

Dynamic

moment

Note)

Σα=+ + <1

Load weight

[

]

Maximum load weight

[

m max

]

Static moment

[

]

Allowable static moment

[

Mmax

]

Sum of guide

load factors

Note 1) Dynamic moment [M

]

Allowable dynamic moment

[

max

]

Note 2)

Note 5)

Note 4)

•

••

υ: Impact speed (mm/s)

L1: Distance to the load’s center of gravity (m)

ME: Dynamic moment (N •m)

δ: Bumper coefficient

With rubber bumper = 4/100

With air cushion = 1/100

With shock absorber = 1/100

g:Gravitational acceleration (9.8 m/s2)

()

MY3A3B.qxd 06.2.17 9:13 AM Page 6

W: Work piece (0.8 kg)

MY3A25-500

Mounting Direction

1. Horizontal

mounting

2. Wall

mounting

3. Ceiling

mounting 4. Vertical

mounting

Work piece

no.

0.8 kg

Weight

(m)

5 mm

X-axis

10 mm

Y-axis

Center of gravity

Z-axis

20 mm

Work Piece Weight and Center of Gravity

Calculation of Guide Load Factor

Front matter 4

Series MY3

Model Selection 2

The following are steps for selecting the MY3 series which is best suited to your application.

Cylinder •••••••••••••••••••••••••••••••••••••• MY3A25-500

Average operating speed υa •••••••••• 300 mm/s

Mounting direction ••••••••••••••••••••••• Horizontal mounting

Cushion •••••••••••••••••••••••••••••••••••••• Rubber bumper (δ= 4/100)

1 Operating Conditions

2 Load Blocking

m1: Mass

m1max (from qof graph MY3A ⁄ m1) = 10.7 (kg) •••••••••••••••••••••••••••••••••••••••••

Load factor α1= m1⁄ m1max = 0.8 ⁄ 10.7 = 0.08

M1: Moment

M1max (from wof graph MY3A ⁄ M1) = 4 (Nm) ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

M1= m1x g x X = 0.8 x 9.8 x 5 x 10-3= 0.04 (Nm)

Load factor α2= M1⁄ M1max = 0.04 ⁄ 4 = 0.01

M2: Moment

M2 max (from eof graph MY3A ⁄ M2) = 0.8 (Nm) ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

M3= m1x g x Y = 0.8 x 9.8 x 10 x 10-3= 0.08 (Nm)

Load factor α3= M2⁄ M2 max = 0.08 ⁄ 0.8 = 0.1

3 Calculation of Load Factor for Static Load

MY3A3B.qxd 06.2.17 9:13 AM Page 7

Front matter 5

Series MY3

Load Weight Allowable Moment

M1E

M3E

Calculation of Guide Load Factor

Moment (Nm)

MY3A, MY3B/M1

MY3A, MY3B/m1MY3A, MY3B/M2MY3A, MY3B/M3

Piston speed (mm/s) Piston speed (mm/s) Piston speed (mm/s)Piston speed (mm/s)

MY3A / 3B16

MY3A / 3B25

MY3A / 3B40

MY3A / 3B63

MY3A / 3B16

MY3A / 3B25

MY3A / 3B40

MY3A / 3B63

MY3A / 3B16

MY3A / 3B25

MY3A / 3B40

MY3A / 3B63

200

100

0.5

15001000500400300200100

0.05

0.1

0.5

0.4

0.3

0.2

15001000500400300200100

100

0.1

0.5

0.4

0.3

0.2

15001000500400300200100

Load weight (kg)

MY3A / 3B16

MY3A / 3B25

MY3A / 3B40

MY3A / 3B63

0.05

0.1

0.5

0.4

0.3

0.2

15001000500400300200100

∗ Refer to page 18 for the MY3M.

Equivalent load FEat impact

FE= 1.4υa x δx mx g= 1.4 x 300 x x 0.8 x 9.8 = 131.7 (N)

M1E: Moment

M1E max (from rof graph MY3A ⁄ M1where 1.4υa = 420 mm/s) = 2.85 (Nm) ••••••••••••••

M1E = x FEx Z = x 131.7 x 20 x 10-3= 0.88 (Nm)

Load factor α4= M1E ⁄ M1E max = 0.88 ⁄ 2.85 = 0.31

M3E: Moment

M3E max (from tof graph MY3A ⁄ M3where 1.4υa = 420 mm/s) = 0.95 (Nm) ••••••••••••••••••••

M3E = x FEx Y = x 131.7 x 10 x 10-3= 0.44 (Nm)

Load factor α5= M3E ⁄ M3E max = 0.44 ⁄ 0.95 = 0.43

——

100

——

4 Calculation of Load Factor for Dynamic Moment

The above calculation is within the allowable value, and therefore the selected model can be used.

Select a shock absorber separately.

In an actual calculation, when the sum of guide load factors Σα in the formula above is more than 1, consider

decreasing the speed, increasing the bore size, or changing the product series.

5 Sum and Examination of Guide Load Factors

MY3A3B.qxd 06.2.17 9:13 AM Page 8

Basic short type (Rubber bumper)

ø16, ø25, ø40, ø63

Basic standard type (Air cushion)

ø16, ø25, ø40, ø63

Series MY3A

Series MY3B

MY3A3B.qxd 06.2.17 9:13 AM Page 9

W: Work piece (0.8 kg)

MY3A25-500

Calculation of Guide Load Factor

Series MY3A/3B

Model Selection

The following are steps for selecting the MY3 series which is best suited to your application.

Mounting Direction

1. Horizontal

mounting

2. Wall

mounting

3. Ceiling

mounting 4. Vertical

mounting

Cylinder •••••••••••••••••••••••••••••••••••••• MY3A25-500

Average operating speed υa •••••••••• 300 mm/s

Mounting direction ••••••••••••••••••••••• Horizontal mounting

Cushion •••••••••••••••••••••••••••••••••••••• Rubber bumper (δ= 4/100)

1 Operating Conditions

2 Load Blocking

m1: Mass

m1max (from qof graph MY3A ⁄ m1) = 10.7 (kg) •••••••••••••••••••••••••••••••••••••••••

Load factor α1= m1⁄ m1max = 0.8 ⁄ 10.7 = 0.08

M1: Moment

M1= m1x g x X = 0.8 x 9.8 × 5 x 10-3= 0.04 (Nm)

Load factor α2= M1⁄ M1max = 0.04 ⁄ 4 = 0.01

M2: Moment

M3= m1x g x Y = 0.8 x 9.8 x 10 x 10-3= 0.08 (Nm)

Load factor α3= M2⁄ M2 max = 0.08 ⁄ 0.8 = 0.1

3 Calculation of Load Factor for Static Load

Work piece

no.

0.8 kg

Mass

(m)

5 mm

X-axis

10 mm

Y-axis

Center of gravity

Z-axis

20 mm

Work Piece Weight and Center of Gravity

MY3A3B.qxd 06.2.17 9:13 AM Page 10

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