Festo DGC-8 Handleiding

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DGC-8 ... 63-...

Festo SE & Co. KG

Ruiter Straße 82

73734 Esslingen

Germany

+49 711 347-0

www.festo.com

Operating instructions

Original instructions

8075213

2017-07h

[8075215]

Linear drive DGC-8 ... 63-... English. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

For all available product documentation è www.festo.com/pk

Note

Fitting and commissioning is to be carried out only by qualified personnel in

accordance with the operating instructions.

1 Operating elements and connections

1 2 3 4

5 6

7 8

1Thread for mounting the cylinder

foot1) or for direct mounting

2Shock absorber or elastomer

shock absorber (exchangeable

è chapter “Commissioning”)

3Guide rail

4Slide

5Centring hole for effective load

6Fastening thread for work load

7Compressed air connections

8Groove for proximity sensor

9Adjusting screw for end position

cushioning

1) Accessories

Fig. 1

2 Function and application

When the compressed air is ports are pressurized

alternately, the piston moves backwards and forwards

in the tubing. By means of a rigid connection, the

outer slide also moves. The slot in the cylinder barrel

required for this is covered by a band system.

Fig. 2 Circuit symbol

The DGC is intended for the space-saving transport of

masses.

Both the slide mode and the yoke operating modes

are permitted (observe loading limits).

Unpressurised movement of the slide is permitted

only for fault elimination and at low speed. If the

speed is too high, the resulting partial vacuum can

pull the sealing band into the piston chamber. This

leads to:

– severe leakage and

– impermissible accelerations (e.g. with a vertical

mounting position).

Fig. 3 Slide operation

Fig. 4 Yoke operation

3 Transport and storage

Note

 Avoid touching the guide rail with your hands during transport und storage.

Otherwise the layer of grease will be damaged.

 Consider the weight of the DGC.

Depending on the design, the DGC weighs over 150 kg.

For transport, the transport belts must be spaced according to the permissible

support distances (support distances è Fig. 6).

4 Requirements for product use

Note

Malfunctions will occur if the device is not used correctly.

 Be sure to always comply with the specifications in this chapter.

 Note the warnings and instructions on the product and in the relevant operat

ing instructions.

 Compare the maximum values specified in these operating instructions with

your actual application (e.g. forces, torques, temperatures, masses).

Only observance of the load limits allows operation of the product in compliance

with the relevant safety regulations.

 Take into consideration the ambient conditions at the location of use.

Corrosive elements in the environment (e.g. ozone) will reduce the service life of

the product.

 Please comply with national and local safety laws and regulations.

 Use the product in its original state without any unauthorised modifications.

 Remove packaging, such as foils and cardboard.

Exception:

– The plastic cover on the aluminium guide rail (with DGC-…-G/GF).

The packing is intended for recycling (except for: oiled paper = general waste).

 Make sure that the compressed air is properly prepared è 11 Technical Data

 Take the tolerance of the tightening torques into account. Unless otherwise

specified, the tolerance is ±20%.

5 Installation

5.1 Fitting mechanical components

 Avoid pushing in or sucking in the sealing band.

Damage to the sealing band reduces its reliability in operation. Jerky movement

of the unpressurised slide can cause a partial vacuum that sucks the sealing

band into the piston chamber.

 Leave all screws and threaded bolts in their original states, unless you are

requested to modify them in these instructions.

 Do not allow the band system to become damaged or excessively dirty.

Damage to the DGC will reduce its reliability and service life.

 Make sure that the device is fitted free of mechanical stress and distortion.

 Use the foot mounting adapter HPC to mount the DGC on the end caps.

 Turn the mounting screws until they are equally tight.

Tightening torques [Nm]

HPC-8 HPC-12/18 HPC-25 HPC-32/40 HPC-50 HPC-63

0.8 1.6 2 4.5 15 23

Fig. 5

Drives with long stroke lengths:

 Use the support spacings (l) for the profile attachments MUC è Fig. 6.

l l

Fig. 6 This shows the support spacings required for the various fittings

Fitting profile fastenings type MUC:

1. Place the profile fastenings equally over the entire length of the drive, and not

just over the stroke length.

2. Fasten the profile fastenings on the DGC è Fig. 7.

Fig. 7

3. Turn the clamping screws until they are equally tight.

Tightening torques [Nm]

MUC-8/12 MUC-18 MUC-25/32 MUC-40 MUC-50/63

1.2 4.1 8.3 14 20

Fig. 8

4. Make sure that the profile attachment does not

collide with the slide or effective load (especially

with lateral mounting). To do this, push the slide

with the effective load over the complete travel

distance.

Fig. 9

With hard and stiff effective loads:

Fig. 10

Note

If the slide becomes bent because of a

buckled effective load, the service life

of the guide will be reduced.

 Make sure that the mounting sur

face of the effective load has the

following flatness (t):

– G/GF: t 0.03 mm

– KF/FA: t 0.01 mm

 Note the tightening torques when fastening the work load on the slide:

Tightening torques [Nm]

DGC- 8/12 18 25/32 40 50/63

M4 2 – – – –G

KF 2.5

M5 – 3.5 3.5 3.5 –

M6 – 6.5 6.5 6.5

M8 – – 10

Fig. 11

Effective loads with own guide:

 Adjust the guides of the work load and of the DGC so that they are exactly

parallel.

This is the only way to avoid overloading the slide è 11 Technical Data: Perm.

forces.

5.2 Fitting pneumatic components

Installation in a vertical or diagonal position:

Warning

If there is a power failure, the work mass will slide down. Danger of crushing!

 Check whether non-return valves HGL are necessary.

In this way, you can prevent the work mass from sliding down suddenly.

 Check whether safety measures are necessary to prevent the mass from sink

ing down slowly as a result of leakage (e.g. toothed latches or moveable

bolts).

 Select the supply ports.

In addition to the supply ports

provided at the factory (W), there are

also the alternative ports (A). These

are fitted with plug screws.

W = Supply ports ex works

A = Alternative ports

Fig. 12

Aø 8/12

With sizes 18 … 63 the compressed

air can be connected on one side

(right).

L = end position left

R = end position right

l = movement to the left

r = movement to the right

Fig. 13

ø 18 ... 63

W (r)

A (l)

W (l)

rA (r)

Setting the slide speed:

 Rotate the one-way flow control valves GRLA into the supply ports.

5.3 Installing the electric components

Position scanning with proximity sensors SME/SMT:

 Use grooves (S) from Fig. 16 to mount the proximity sensors.

 Observe the minimum distances between ferritic masses and the proximity

sensors.

In this way you will avoid incorrect switching as a result of external influences.

Minimum clearances [mm]

POS 8 12 18 25 32 … 63

L1 10 0 0

2– 0 0

L2 120 10 10 0

2– 25 25

L3 130 25 25 25

2– 10 25 0

L4 10 0 0

2– 0 0

Fig. 14 (POS = position of proximity sensor)

 Place the proximity sensor on DGC-8/12 as follows:

Position SME-10/SMT-10F-KL (-SL) SME-10/SMT-10F-KQ (-SQ)

End position left

(“L” è Fig. 12)

Cable exit to cylinder centre neces

sary

Fastening screw faces end cap

End position right

(“R” è Fig. 12)

Fitting position, any Fitting position, any

Fig. 15

In this way, you take into consideration the fact that the switching solenoid is

arranged asymmetrically (left) on the internal slide.

In case of continuous signal:

 Check whether the proximity switch has been fitted the right way round.

Laying the cables for the proximity switches:

 Note that the cables for the proximity switches can be passed through the

groove.

5.4 Installation of accessories

 Use the grooves as per Fig. 16 for fastening the accessories.

S = Groove for proximity switches (sensors)

N = Groove for mounting attachments

DGC-8 DGC-12 DGC-18 DGC-25

S S S

DGC-32 DGC-40 DGC-50 DGC-63

SNS

S NN S N

SNN

Fig. 16

 Use slot covers to avoid dirt in the sensor grooves (S) of the DGC-18 … 63.

6 Commissioning

6.1 Commissioning the complete system

 Slowly pressurise the complete system. In this way you will prevent sudden

uncontrolled movements.

For slow start-up pressurisation, use on-off valve HEL.

6.2 Preparing for commissioning

With effective loads or at high and medium slide speeds:

 Use the configuration tool “DGC-QuickCalc” for pneumatic drives in the down

load area è www.festo.com

 Use cushioning elements of sufficient size.

Without external cushioning devices the DGC will withstand maximum speeds

and work loads as per catalogue specifications.

Warning

Without external cushioning devices the DGC may be damaged if the maximum

values specified in the catalogue are exceeded.

 Even in the event of faults, the limit values must not be exceeded.

Before each commissioning and in operation:

Warning

Fig. 17

Within the positioning range, make sure that

– nobody can reach into the path of the movable

components (e.g. by providing a protective

guard).

– there are no objects in the positioning path.

It should not be possible to touch the DGC until

the mass has come to a complete standstill.

For DGC-…-G/GF:

 Remove the protective cover from the guide rail.

6.3 Carrying out commissioning

1. Close the one-way flow control valves

– for both sides at first completely,

– then open one rotation.

Fig. 18

Using the internal end position cushioning PPV:

2. Close the adjusting screws for the internal end

position cushioning PPV

– first close completely,

– then open one rotation.

Fig. 19

3. Pressurise the DGC as follows:

– At first on both sides simultaneously. The slide will then move slightly to a

centre of equilibrium.

– Then exhaust the DGC on one side. In this way you can avoid peak loadings on

the DGC and in the compressed air network.

4. Start a test run.

5. Check whether the speed of the slide must be modified.

Mass geometries with projection:

Warning

Fig. 20

Danger of collision

 Note that the adjusting screws of the DGC may

only be turned when the slide is at a stand.

6. Open up the one-way flow control valves slowly until the desired slide speed is

reached.

7. Open the adjusting screws for the internal end position cushioning.

The slide should reach the end position without striking hard against it or

bouncing back.

Accurate adjustment of the stroke:

Warning

The DGC will be damaged if it is operated without the stop sleeve (H) and the

locking nut (K).

 Fit the cushioning components together only with the stop sleeve (H) and the

lock nut (K).

1. Loosen locking nut (K).

2. Screw the cushioning element in or out.

DGC-...(-GP) with elastomer shock

absorber

DGC-...-YSR(W) with shock

absorber

HK HK

Fig. 21

Note

 For reasons of stability, distance d from Fig. 21 must not exceed the values in

the following table:

Distance d [mm]

DGC- 8 12 18 25

G/GF/KF-P/PPV 11.3 … 16.3 12.7 … 17.7 13.8 … 15.8 1) 21.1 … 25.1 1)

GP-P/PPV – – 16.9 … 18.9 1) 23.6 … 27.6 1)

GF-YSR(W) 12.8 … 22.8 22.5 … 32.514 … 24 14.5 … 24.5

KF-YSR(W) 12.8 … 22.8 22.5 … 32.514 … 24 14.5 … 24.5

Distance d [mm]

DGC- 40 50 6332

G/GF/KF-P/PPV 25.2 … 30.2 1) 28.7 … 33.7 1) 28.7 … 33.7 1) 38.8 … 43.8 1)

GP-P/PPV 25.2 … 30.2 1) 34.7 … 39.7 1) – –

GF-YSR(W) 27.3 … 37.3 31 … 41 31 … 56 41 … 76

KF-YSR(W) 27.3 … 52.3 31 … 56 31 … 56 41 … 76

1) Restriction: Additional masses and speed must be reduced.

Fig. 22

3. Tighten the locking nuts (K) with the following tightening torque.

Tightening torques [Nm]

DGC- 8/12 18 25 40 50 6332

G-P/YSR(W) 2 –

GF-YSR(W) – 3 5 8 20 35 60

KF-YSR(W) 2 5 20 20 35 35 60

Fig. 23

If the work load or dynamics are modified:

 Check whether other cushioning components are necessary.

7 Service and maintenance

Maintaining the band system:

 Clean the band system if required with a soft cloth.

 Avoid cleaning agents which will damage the band system which is made of PU.

Excessive friction or the use of grease-solvent cleaning agents (e.g. soap suds)

will damage the grease layer.

 Lubricate the surface of the band system if it no longer has a layer of grease.

Grease type: LUB-KC1 (LUB-E1 for DGC-...-H1).

Product specificaties

Merk:	Festo
Categorie:	Niet gecategoriseerd
Model:	DGC-8

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