SMC Networks MY3A Series Bedienungsanleitung

Doc. no. MY*A-OM0002H-D

PRODUCT NAME

Mechanically Jointed Rodless Cylinder

Basic short type

Basic standard type

Slide bearing type

MODEL/ Series

MY3A/3B/3M Series

Contents

Safety Instructions・・・・・・・・・・・・・・・・・・・・Ｐ．３～９

１．Mounting

１．１ Cylinder mounting face・・・・・・・・・・・・・・Ｐ．１０

１．２ How to mount・・・・・・・・・・・・・・・・・・・Ｐ．１０～１１

１．３ Piping・・・・・・・・・・・・・・・・・・・・・・Ｐ．１１

１．４ Cautions in mounting・・・・・・・・・・・・・・・Ｐ．１２～１３

１．５ How to mount a switch ・・・・・・・・・・・・・・Ｐ．１４

１．６ Auto Switch mounting positions・・・・・・・・・・Ｐ．１５～１６

２．How to select of cylinder・・・・・・・・・・・・・・・Ｐ．１７～２９

３．Replaceable parts and inspection, maintenance

３．１ Replaceable parts・・・・・・・・・・・・・・・・Ｐ．２９

３．２ Inspection, maintenance・・・・・・・・・・・・Ｐ．２９

４．Precautions

４．１ Operating environment・・・・・・・・・・・・・・Ｐ．２９

４．２ Intermediate stop・・・・・・・・・・・・・・・・Ｐ．３０

４．３ Use a cylinder with external guides・・・・・・・Ｐ．３０～３１

４．４ Parallel operation of cylinders・・・・・・・・・Ｐ．３１

４．５ Air leakage caused by detachment of seal belt・・Ｐ．３２

４．６ About rubber bumper displacement ・・・・・・・・Ｐ．３３

４．７ Air cushion adjustment ・・・・・・・・・・・・・Ｐ．３４

４．８ Stroke adjusting unit・・・・・・・・・・・・・・Ｐ．３４

５．Technical date

Applicable grease ・・・・・・・・・・・・・・・・・・・Ｐ．３５

Guide for replacement of MY3A/B Sliding bearing ・・・・Ｐ．３６

Guide for replacement of MY3A/B seal belt・・・・・・・・Ｐ．３７

Guide for replacement of MY3A/B dust seal band ・・・・・Ｐ．３８

Adjusting procedure of MY3M slide bearing ・・・・・・・Ｐ．３９

Disassembly/Assembly procedure of MY3M ・・・・・・・・・Ｐ．４０～４１

-2-

Operation manual of MY3A/3B/3M Series

Safety Instructions

These safety instructions are intended to prevent a hazardous situation and/or

equipment damage. These instructions indicate the level of potential hazard by a

label of “Caution”, “Warning”. To ensure safety, be sure to observe ISO4414(Note

1), JIS B 8370(Note 2) and other safety practices.

！ Warning Operator error could result in serious injury or loss of life.

！ Caution Operator error could result in injury or equipment damage.

(Note 1) ISO4414: Pneumatic fluid power - General rules relating to systems

(Note 2) JIS B 8370: General Rules for Pneumatic Equipment

Explanation of Graphical symbol

Graphical

symbol Meaning of graphical symbol

Prohibition

“ ”shows the prohibition (Do not do). A concrete content of the

prohibition is in the chart sign and directed by the picture and sentences

to be near.

Instruction

“ ”shows the compulsion of the directed act (Do). A concrete content

is in the chart sign and directed by the picture and sentences to be near.

-3-

! Warning

1. The compatibility of pneumatic equipment is the responsibility of the

person who designs the pneumatic system or decides its

specifications.

Since the products specified here are used in various operating conditions, their

compatibility for the specific pneumatic system must be based on specifications or after

analysis and/or tests to meet your specific requirements. Please examine all content

of the specification according to a product catalog and material which is hereafter the

latest, and compose the system in consideration of the situation of the possibility of

the breakdown of the equipment.

2. Only trained personnel should operate pneumatically operated machinery and

equipment.

Compressed air can be dangerous if handled incorrectly. Assembly, handling or repair

of pneumatic systems should be performed by trained and experienced operators.

3. Do not service machinery/equipment or attempt to remove components until safety

is confirmed.

1. Inspection and maintenance of machinery/equipment should only be performed after

confirmation of safe locked-out control positions.

2. When equipment is to be removed, confirm the safety process as mentioned above. Cut

the supply pressure for this equipment and exhaust all residual compressed air in the

system.

3. Before machinery/equipment is restarted, take measures to prevent shooting-out of

cylinder piston rod, etc. (Bleed air into the system gradually to create back

pressure.)

4. Contact SMC if the product is to be used in any of the following conditions:

1. Conditions and environments beyond the given specifications, or if product is used

outdoors.

2. Installation on equipment in conjunction with atomic energy, railway, air navigation,

vehicles, medical equipment, food and beverages, recreation equipment, emergency stop

circuits, press applications, or safety equipment.

3. An application which has the possibility of having negative effects on people, property,

or animals, requiring special safety analysis.

-4-

Instruction

5. There is a danger of sudden action by air cylinders if sliding parts of machinery

are twisted, etc., and changes in forces occur.

In such cases, human injury may occur; e.g., by catching hands or feet in the machinery,

or damage to the machinery itself may occur.

Therefore, the machine should be designed to avoid such dangers.

6. Install a protective cover when there is a risk of human injury.

If a driven object and moving parts of a cylinder pose a danger of human injury, design

the structure to avoid contact with the human body.

7. Securely tighten all mounting parts and connecting parts so that they will not

become loose.

Especially when a cylinder operates with high frequency or is installed where there

is a lot of vibration, ensure that all parts remain secure.

8. A deceleration circuit or shock absorber, etc., may be required.

When a driven object is operated at high speed or the load is heavy, a cylinder’s cushion

will not be sufficient to absorb the impact. Install a deceleration circuit to reduce

the speed before cushioning, or install an external shock absorber to relieve the impact.

In this case, the rigidity of the machinery should also be examined.

9. Consider a possible drop in operating pressure due to a power outage, etc.

When a cylinder is used in a clamping mechanism, there is a danger of work pieces dropping

if there is a decrease in clamping force due to a drop in circuit pressure caused by

a power outage, etc. Therefore, safety equipment should be installed to prevent damage

to machinery and/or human injury. Suspension mechanisms and lifting devices also

require consideration for drop prevention.

10. Consider a possible loss of power source.

Measures should be taken to protect against human injury and equipment damage in the

event that there is a loss of power to equipment controlled by air pressure, electricity

or hydraulics, etc.

-5-

Instruction

11. Design circuitry to prevent sudden lurching of driven objects.

When a cylinder is driven by an exhaust center type directional control valve or when

starting up after residual pressure is exhausted from the circuit, etc., the piston

and its driven object will lurch at high speed if pressure is applied to one side of

the cylinder because of the absence of air pressure inside the cylinder. Therefore,

equipment should be selected and circuits designed to prevent sudden lurching because,

there is a danger of human injury and/or damage to equipment when this occurs.

12. Consider emergency stops.

Design so that human injury and/or damage to machinery and equipment will not be caused

when machinery is stopped by a safety device under abnormal conditions, a power outage

or a manual emergency stop.

13. Consider the action when operation is restarted after an emergency stop or

abnormal stop.

Design the machinery so that human injury or equipment damage will not occur upon restart

of operation. When the cylinder has to be reset at the starting position, install safe

manual control equipment.

14. Confirm the specifications.

The products advertised are designed according to use in industrial compressed air

systems. If the products are used in conditions where pressure, temperature, etc., are

out of specification, damage and/or malfunction may be cause. Do not use in these

condition. (Refer to specifications)

Consult SMC if you use a fluid other than compressed air.

15. Use clean air.

Does not use compressed air which includes chemicals, synthetic oils containing organic

solvents, salt or corrosive gas, etc., as it can cause damage or malfunction.

16. Do not use in environments where there is a danger of corrosion.

Refer to the construction drawings regarding cylinder materials.

17. Please follow the manual of auto switch for the handling of auto switch.

-6-

Prohibition

Instruction

Prohibition

Instruction

! Caution

1. Operate the piston within a range such that collision damage will not occur at

the stroke end.

Operate within a range such that damage will not occur when the piston having inertial

force stops by striking the cover at the stroke end. Refer to the cylinder model

selection procedure for the range within which damage will not occur.

2. Use a speed controller to adjust the cylinder drive speed, gradually increasing

from a low speed to the desired speed setting.

3. Provide intermediate supports for long stroke cylinders.

Provide intermediate supports for cylinders with long strokes to prevent bending of

the tube, and deflection due to vibration and external loads, etc.

4. Do not apply strong impacts or excessive moment to the slide table (slider).

The slide table (slider) is supported by precision bearings or resin bearings. Therefore,

do not apply strong impacts or excessive moment, etc., when mounting work pieces.

5. Do not scratch or gouge the cylinder tube by striking or grasping it with other

objects.

Cylinder bores are manufactured to precise tolerances, so that even a slight deformation

may cause malfunction.

6. Readjust with the cushion needle.

The cushion is adjusted before shipment from the factory, but the cushion needle located

on the cover should be readjusted before operation according to the load and operating

speed, etc. Turning the cushion needle clockwise closes the restriction and increases

the strength of the cushion.

7. Do not operate with the cushion needle completely closed.

This can cause damage to seals.

-7-

Instruction

Prohibition

Instruction

Prohibition

8. Be careful not to get hands caught in the unit.

When using a product with stroke adjusting unit, the space between the slide table

(slider) and the stroke adjusting unit becomes narrow, causing a danger of hands getting

caught. Install a protective cover to prevent direct contact with the human body.

9. Do not use until you can verify that equipment can operate properly.

Verify correct mounting by suitable function and leakage inspections after compressed

air and power are connected following mounting, maintenance or conversions.

10. Preparation before piping

Before piping is connected, it should be thoroughly blown out with air (flushing) or

washed to remove chips, cutting oil and other debris from inside the pipe.

11. Wrapping of pipe tape

When screwing together pipes and fittings, etc., be certain that chips from the pipe

threads and sealing material do not get inside the piping.

Also, when pipe tape is used, leave 1.5 to 2 thread ridges exposed at the end of the

threads.

12. Lubrication of non-lube type cylinder

The cylinder is lubricated at the factory and can be used without any further lubrication.

However, in the event that it will be lubricated, use class 1 turbine oil (without

additives) ISO VG32.

Stopping lubrication later may lead to malfunction due to the loss of the original

lubricant. Therefore, lubrication must be continued once it has been started.

13. Install air filters.

Install air filters at the upstream side of valves. The filtration degree should be 5

μm or finer.

14. Install an after cooler, air dryer or water separator, etc.

Air that includes excessive drainage may cause malfunction of valves and other

pneumatic equipment. To prevent this, install an after cooler, air dryer or water

separator, etc.

-8-

Instruction

15. Use the product within the specified range of fluid and ambient temperature.

Take measures to prevent freezing, since moisture in circuits can be frozen under 5℃,

and this may cause damage to seals and lead to malfunction.

16. Drain flushing

Remove drainage from air filters regularly.

17. Piston speed

As for mechanically jointed rodless cylinder, the fluctuation of the piston speed might

become large compared with the standard air cylinder.

Please consult us if considering it is used in the application for which the definite

speed is necessary.

-9-

Instruction

１．Mounting

１．１ Cylinder mounting face

While a high level of flatness is desired for the surface on which the cylinder

is to be mounted, if sufficient flatness cannot be attained, use shims to adjust

the mounting of the cylinder so that the slide table can be operated throughout

its stroke under the minimum operating pressure (0.15MPa).

１．２ How to mount

[１] Mount the main body at the head cover parts on both ends. The mounting face

that is at the bottom of the tube more than 5mm is necessary for the cylinder

both ends fixed part.

（Refer to Fig.-1）

ig.-1

Fig-1

[２] When a cylinder is mounted on the ceiling or the wall, support a cylinder tube

both ends part by the side supports in addition to the fixed bolt of the head

cover port.（Refer to Fig.-2）

Fig.-2 Fig-2

[３] Avoid mounting at slide table.(Refer to Fig.-3) It means the excessive load

on the bearing part and it causes mal function.

-10-

5mm or over 5mm or over

Side support Side support

Instruction

Prohibition

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