Festo DDPC Manuale utente

Operating

instructions

8113368

201905b

[8113370]

Standard cylinder

DDPC

2Festo – DDPC – 201905b

Translation of the original instructions

Identification of hazards and instructions on how to prevent them:

Danger

Immediate dangers which can lead to death or serious injuries

Warning

Hazards that can cause death or serious injuries

Caution

Hazards that can cause minor injuries

Other symbols:

Note

Material damage or loss of function

Recommendations, tips, references to other documentation

Essential or useful accessories

Information on environmentally sound usage

Text designations:

 Activities that may be carried out in any order

1. Activities that should be carried out in the order stated

– General lists

èResult of an action/References to more detailed information

DDPC

Festo – DDPC – 201905b English 3

English – Standard cylinder DDPC

Table of contents

1 Control sections and connections 4............................................

2 Function and application 4...................................................

3 Transport and storage 5.....................................................

4 Requirements for product use 5...............................................

5 Installation 6..............................................................

5.1 Mechanical installation 6.....................................................

5.2 Pneumatic installation 8.....................................................

5.3 Electrical installation 9.......................................................

6 Commissioning 10...........................................................

7 Operation 11...............................................................

8 Maintenance and care 11.....................................................

9 Disassembly and repair 11....................................................

10 Accessories 12..............................................................

11 Troubleshooting 12..........................................................

12 Technical data 13............................................................

DDPC

4 Festo – DDPC – 201905b English

1 Control sections and connections

For all available product documentation èwww.festo.com/pk

1Supply ports

2Electrical connection of the measuring head

3Measuring head

4Flange screws with threaded holes for

mounting

5Square piston rod with integrated magnetic

measuring tape

6Centring collar

7Earth terminal

Fig. 1

2 Function and application

When the supply ports are pressurised alternately, the piston rod of the DDPC standard cylinder moves

in and out. The standard cylinder features an integrated, incremental displacement encoder. There is a

magnetic tape in the piston rod. A sensor in the bearing cap converts the magnetic pulses of the mag

netic tape into electric signals.

The DDPC has been designed for transporting work masses. The integrated measuring system has been

designed for monitoring the piston position in combination with a positioning controller from Festo

(e. g.B. CPX-CMPX, CPX-CMAX, SPC200, SPC11 “Soft Stop”) or for use as a measuring cylinder with

CPX-CMIX or DADE.

The DDPC is not intended for manufacturing processes which are sensitive to copper or PTFE.

DDPC

Festo – DDPC – 201905b English 5

3 Transport and storage

 Take into account the weight of the DDPC.

Depending on the design, the DDPC weighs over 10 kg.

 The following should be observed with regard to storage:

– short storage times

– cool, dry, UV and corrosion resistant

– no influence from magnetic fields

4 Requirements for product use

Note

Special conditions apply to the electronic regulation of the DDPC:

 Note the warnings and instructions in the descriptions of the positioning controller.

Note

Improper handling can result in malfunctions.

 Make sure that the specifications contained in this chapter are adhered to at all

times.

This is the only way to ensure correct and safe product behaviour.

 Take into consideration the legal regulations applicable for the destination, as well as:

– regulations and standards,

– regulations of the testing organizations and insurers,

– national specifications.

 Note the warnings and instructions on the product and in the relevant operating instructions.

 Remove all of the transport packaging such as transparencies, caps and cartons

(with the exception of any covers in the pneumatic ports).

The material used in the packaging is intended for recycling

(exception: oil paper = residual waste).

 Observe the local regulations for environmentally friendly waste management of electronic compon

ents.

 Take into account the material specifications (èTechnical data).

 Use the product in its original status, without any unauthorised product modifications.

 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.

 Compare the limit values specified in these operating instructions with your actual application

(e. g. pressures, forces, torques, temperatures, masses, speeds, etc.).

Operation of the product in compliance with the relevant safety regulations is contingent on adher

ence to the load limits.

 Take the tolerance of the tightening torques into account. Unless otherwise specified, the tolerance

is ±20 %.

DDPC

6 Festo – DDPC – 201905b English

 Make sure the compressed air is properly prepared (èTechnical data).

 Maintain the selected medium for the total service life of the product.

Example: Always use non-lubricated compressed air.

 Pressurize your entire system slowly. There will then be no uncontrolled movements.

For slow start-up pressurisation, use start-up valve type HEL (èAccessories).

5 Installation

5.1 Mechanical installation

 Check the application of the DDPC:

– as a measuring cylinder

– with electronic control

Note

If the DDPC is used with electronic control:

 Use the DDPC only in the approved mounting positions

(èdrive-specific information on the positioning controllers).

 To install the mechanical system, please observe the instructions in the descriptions

of the positioning controller.

 Make sure that tubing and connection accessories have sufficient space for movement.

If the cylinders are arranged parallel:

 Take the following minimum space requirements into account. Otherwise the magnetic fields of the

two cylinders will influence each other and lead to evaluation faults in the measuring system.

Parallel assembly Offset assembly

Bearing cap flush (Y = 0) Bearing cap offset (Y >0)

Cable outlet between the

cylinders

Cable outlet not between the

cylinders

No minimum distance Minimum distance X 70 mm Minimum distance X 60 mm

Tab. 1

DDPC

Festo – DDPC – 201905b English 7

In the case of direct fastening or use of mounting accessories in each case with cylinder collar hole

milling:

 Select a mounting option (e.g. from the following table).

Double screw connection with HNC foot

mounting in the threaded holes of the cover

screws

Quadruple screw connection with FNC flange

mounting in the threaded holes of the cover

screws

Tab. 2

 Tighten the mounting screws evenly.

The different product sizes have the following connecting threads and tightening torques:

Size 80 100

Connecting thread M10 M10

Tightening torque [Nm] 10 + 2 10 + 2

Tab. 3

If accessories are mounted on the piston rod:

 Use the following elements:

– only the thread of the piston rod.

– the square piston rod 5for counter pressure

(only in the retracted end position).

The maximum torque on the bearing must not exceed 5 Nm.

Fig. 2

– an external guide for the work load.

This will prevent lateral loads on the piston rod.

Lateral loads produce false measurement results and may

damage the measuring system.

Fig. 3

DDPC

8 Festo – DDPC – 201905b English

When using additional proximity sensors:

 Place the proximity switches in the fastening grooves.

 Use slot covers over the grooves to fasten the cables and pro

tect them against dirt (èAccessories).

Fig. 4

5.2 Pneumatic installation

 Remove the covers from the compressed air supply ports.

 Connect the tubing of the DDPC to the supply ports 1

(èAccessories).

If the DDPC is used as a measuring cylinder:

 Screw the one-way flow control valves GRLZ or GRLA directly

into the relevant supply ports (èAccessories).

One-way flow control valves enable the speed to be set.

Fig. 5

If the DDPC is used with electronic control:

Note

 Observe the installation instructions and information specified especially for the

DDPC in the descriptions for the positioning controller.

 Use a proportional directional control valve for controlling the

DDPC (èAccessories).

The proportional directional control valve in conjunction with

the controller electronics creates the desired movement by

means of the differential pressure on the two piston surfaces.

Fig. 6

DDPC

Festo – DDPC – 201905b English 9

5.3 Electrical installation

 Avoid external influences by magnetic or ferritic parts in the

vicinity of the measuring head (approx. 100 mm).

 Insert the screw with cutting thread supplied into the hole for

the earth terminal 7.

This ensures electrical contact is established in spite of the

anodising layer.

 Connect the earth cable with low impedance (short cable with

large cross-sectional area) to the earth potential.

Fig. 7

If the DDPC is used with electronic control:

 Connect the measuring system to the connecting cable as described in the descriptions for the posi

tioning controller.

If the DDPC is used as a measuring cylinder:

 Connect the measuring system as follows:

Pin Function Cable colour Pin allocation (M12-plug,

A-coding, plug view)

15 V black

2GND brown

3 sin+ red

4 sin– orange

5 cos– green

6 cos+ yellow

7 Screening Screening

8n. c. –

Tab. 4

DDPC

10 Festo – DDPC – 201905b English

6 Commissioning

Warning

Injury to people and damage to property.

Fast moving parts can cause injury to people in the

vicinity of the DDPC.

 Make sure that nobody can place his/her hand

in the positioning range of the effective load

(e. g. by means of a protective guard). If the

DDPC is protected correctly, it should not be

possible to gain access to it until it has come to

a complete stand.

 Make sure no objects project into the position

ing range of the effective load.

Fig. 8

If the DDPC is used as a measuring cylinder:

 Observe the commissioning instructions for the measuring signal amplifier used.

1. Push the piston rod at first into a mechanical end position.

2. Screw the one-way flow control valves into both supply ports

– at first completely (delivery status)

– then one rotation open again.

3. Slowly pressurise the supply port of the mechanical end position.

4. Start a test run.

5. Unscrew the one-way flow control valves until the desired speed is reached.

6. End the test run.

If the DDPC is used with electronic control:

Note

Special commissioning regulations apply to the electronic control of the DDPC.

 Complete the commissioning procedure in accordance with the descriptions for the

positioning controller.

 Start a test run (at permiss. minimum pressure).

 Check to see if the settings on the DDPC or on the controller need to be modified:

– Reference stop

– Speed

– Switching points

– Motion sequence.

 End the test run.

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