Pneumatics Basic level

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Workbook TP 101 With CD-ROM Festo Didactic 541088 EN

Pneumatics

Basic level

Pneumatics, Basic lev

el W orkbook TP 101 Festo worldwide Argentina Festo S.A. Edison 2392 (B1640 HRV) Martinez Prov. Buenos Aires

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Germany

Festo Didactic GmbH & Co. KG Postfach 10 07 10 73707 Esslingen Rechbergstraße 3 73734 Esslingen Tel. ++49 (0)711/3467-0 Fax ++49 (0)711/347-54 88500 E-mail: did@de.festo.com Greece Festo Ltd. 40 Hamosternas Ave. 11853 Athens Tel. ++30 210/341 29 00, Fax 341 29 05 E-mail: info_gr@festo.com Hong Kong Festo Ltd.

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Festo Controls Private Ltd. 237B,

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Indonesia

PT. Festo

JL. Sultan Iskandar Muda No.68 Arteri Pondok Indah Jakarta 12240 Tel. ++62 (0)21/27 50 79 00, Fax 27 50 79 98 E-mail: info_id@festo.com Iran Festo Pneumatic S.K. # 2, 6th street, 16th avenue, Tehran 1581975411

Km 8, Special Karaj Road, P.O.Box 15815-1485 Tehran 1389793761 Tel. ++98 (0)21 44 52 24 09, Fax ++98 (0)21 44 52 24 08 E-mail: Mailroom@festo.ir Ireland Festo Limited Unit 5 Sandyford Park Sandyford Industrial Estate Dublin 18

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Israel

Festo Pneumatic Israel Ltd. P.O. Box 1076, Ha'atzma'ut Road 48 Yehud 56100

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Italy

Festo S.p.A Via Enrico Fermi 36/38 20090 Assago (MI) Tel. ++39 02/45 78 81, Fax 488 06 20 E-mail: info_it@festo.com Japan Festo K.K. 1-26-10 Hayabuchi, Tsuzuki-ku Yokohama 224-0025 Tel. ++81 (0)45/593 56 10, Fax 593 56 78 E-mail: info_jp@festo.com Korea South

Festo Korea Co., Ltd. 470-1 Gasan-dong, Geumcheon-gu Seoul #153-803 Tel. ++82 (0)2/850 71 14, Fax 864 70 40 E-mail: info_kr@festo.com Latvia Festo SIA Deglava 60 1035 Riga Tel. ++371 67/57 78 64, Fax 57 79 46 E-mail: info_lv@festo.com Lithuania Festo UAB Karaliaus Mindago pr. 22 3000 Kaunas Tel. ++370 (8)7/32 13 14, Fax 32 13 15 E-mail: info_lt@festo.com Malaysia Festo Sdn.Berhad 10 Persiaran Industri

Bandar Sri Damansara, Wilayah Persekutuan 52200 Kuala Lumpur

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Mexico

Festo Pneumatic, S.A. Av. Ceylán 3 Col. Tequesquinahuac 54020 Tlalnepantla, Edo. de México Tel. ++52 (01)55/53 21 66 00, Fax 53 21 66 55 E-mail: festo.mexico@mx.festo.com Netherlands Festo B.V. Schieweg 62 2627 AN Delft Tel. ++31 (0)15/251 88 99, Fax 261 10 20 E-mail: info@festo.nl New Zealand Festo Limited MT. Wellington Auckland NZ Tel. ++64 (0)9/574 10 94, Fax 574 10 99 E-mail: info_nz@festo.com Nigeria Festo Automation Ltd.

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Peru

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Philippines

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Poland

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Slovakia

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Slovenia

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Spain

Festo Pneumatic, S.A. Tel. 901243660 Fax 902243660 Avenida Granvia, 159 Distrito económico Granvia L'H ES-08908 Hospitalet de Llobregat, Barcelona Tel. ++ 3493/261 64 00, Fax 261 64 20 E-mail: info_es@festo.com

Sweden

Festo AB

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Thailand

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Turkey

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United States

Festo Corporation (New York) Call Toll-free 800/993 3786 Fax Toll-free 800/963 3786 395 Moreland Road, P.O.Box 18023 Hauppauge, N.Y. 11788

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Venezuela

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Use for intended purpose

The training system from Festo Didactic has been developed and produced exclusively for training and further education in the field of automation and technology. The respective training companies and/or trainers must ensure that all trainees observe the safety precautions which are described in this workbook. Festo Didactic hereby excludes any and all liability for damages suffered by trainees, the training company and/or any third parties, which occur during use of the equipment in situations which serve any purpose other than training and/or further education, unless such damages have been caused by Festo Didactic due to malicious intent or gross negligence.

Order no. 541088

Status: 10/2009

Authors: W. Haring, M. Metzger, R.-C. Weber

Editor: Frank Ebel

Graphics: Doris Schwarzenberger

Layout: 12/2009

E-mail: did@de.festo.com

The reproduction, distribution and utilisation of this document, as well as the communication of its contents to others without explicit authorisation, is prohibited. Offenders will be held liable for compensation of damages. All rights reserved, in particular the right to file patent, utility model and registered design applications. Portions of this documentation may be duplicated by an authorised user exclusively for training purposes.

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Preface _________________________________________________________________________________ V Introduction ____________________________________________________________________________ VII Technology module for pneumatics (TP100) ____________________________________________________X Learning objectives for the basic level (TP101) _________________________________________________ XI Overview of learning objectives per exercise __________________________________________________ XII Equipment set for the basic level (TP101) ____________________________________________________ XIV Allocation of equipment per exercise _______________________________________________________ XVIII Practical tools for the trainer _______________________________________________________________ XIX Structure of the exercises _________________________________________________________________ XIX Designations of the components ____________________________________________________________ XIX CD ROM contents ________________________________________________________________________ XX Equipment set for the advanced level (TP102) ________________________________________________ XXII Learning objectives for the advanced level (TP102) ____________________________________________ XXIII

Solutions

Exercise 1: Pressing cheeses _________________________________________________________________ 1 Exercise 2: Opening a fodder silo _____________________________________________________________ 9 Exercise 3: Clamping boards to a saw bench __________________________________________________ 15 Exercise 4: Sorting packages _______________________________________________________________ 21 Exercise 5: Stopping milk bottles ___________________________________________________________ 31 Exercise 6: Opening and closing a pipeline ___________________________________________________ 37 Exercise 7: Shutting off a pipeline ___________________________________________________________ 45 Exercise 8: Actuating a shut-off device _______________________________________________________ 51 Exercise 9: Expanding the control system for pressing cheeses ___________________________________ 59 Exercise 10: Clamping a workpiece __________________________________________________________ 65 Exercise 11: Loading wire baskets __________________________________________________________ 73 Exercise 12: Actuating a sliding door ________________________________________________________ 79 Exercise 13: Feeding wooden boards ________________________________________________________ 87 Exercise 14: Compacting beverage cans ______________________________________________________ 93 Exercise 15: Packaging of brochures ________________________________________________________ 99 Exercise 16: Mounting locking pins _________________________________________________________ 105 Exercise 17: Labelling paint pots ___________________________________________________________ 111 Exercise 18: Cleaning workpieces __________________________________________________________ 117 Exercise 19: Pressing labels into place ______________________________________________________ 123

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Preface

Festo Didactic’s training system for automation and technology is geared towards various educational backgrounds and vocational requirements. The training packages are therefore broken down as follows:

• Basic modules impart basic, interdisciplinary, technological knowledge.

• Technology modules address the important topics of open and closed-loop control technology.

• Function modules explain the fundamental functions of automated systems.

• Application modules enable training and further education that is aligned with real-life practice.

The technology modules deal with various technologies including pneumatics, electro-pneumatics,

programmable logic control systems, automation using a personal computer, hydraulics, electrohydraulics, proportional hydraulics, sensor technology, electric drives and applications technology (handling).

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VI © Festo Didactic GmbH & Co. KG 541088 The modular design of the training system makes it possible to focus on applications above and beyond those covered in the individual modules, such as, for example, PLC actuation of pneumatic, hydraulic and electric drives.

All training modules have the same structure:

• Hardware

• Teachware

• Software

• Seminars

The hardware is comprised of industrial components and systems that are specially designed for training purposes.

The structure of the teachware corresponds to that of the training hardware. It includes:

• Textbooks (with exercises and examples)

• Workbooks (with practical exercises, supplementary instructions and solutions)

• Transparencies and videos (for dynamic instruction)

The working materials for TP101 consist of 19 exercises and a workbook. Each exercise has its own set of ready-to-use worksheets. The solutions are included in the workbook, which also has the worksheets and a CD ROM. The exercises can be purchased without the workbook and are used as consumables. They can thus be easily made available to trainees. Data sheets for the hardware components are made available along with the training module and on the CD ROM.

The teaching and learning media are available in several languages. They’re intended for use in classroom instruction, but are also suitable for self-study.

Where software is concerned, computer training programs and programming software are made available for programmable logic controllers.

A wide range of seminars covering the contents of the technology module round off the programme for training and further education.

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Introduction

This workbook is part of the training system for automation and technology from Festo Didactic GmbH & Co. KG. The system provides a solid basis for practical training and further education. The TP100 technology module only includes pneumatic control systems.

The TP101 basic level is suitable for basic training in the field of pneumatic control technology. It covers the fundamentals of pneumatics as well as the function and use of pneumatic equipment. The equipment can be used to set up simple pneumatic control systems.

The TP102 advanced level comprises vocational training in the field of pneumatic control technology. The equipment can be used to set up extensive combinatory circuits with linking of the input and output signals as well as control systems with stepper modules.

A permanent workstation equipped with a Festo Didactic profile plate is a prerequisite for setting up the control systems. The profile plate has 14 parallel T-slots at 50 mm intervals. A portable compressor with silencer (230 V, max. 8 bar = 800 kPa) can be used for compressed air supply.

Working pressure should not exceed 6 bar (600 kPa).

Ideal control sequence reliability can be achieved by operating the control system at a working pressure of 5 bar (500 kPa) without oil.

All the control systems for the 19 exercises are set up using the equipment set for the TP101 basic level. The theoretical fundamentals for understanding this series of exercises are included in the textbook:

• Pneumatics, basic level

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VIII © Festo Didactic GmbH & Co. KG 541088

Work instructions and safety precautions

General

• Trainees should only work with the control systems under the supervision of a trainer.

• Observe specifications included in the data sheets for the individual components and in particular all

safety instructions!

Mechanical

• Mount all the components securely onto the profile plate.

• Limit switches must not be actuated frontally.

• Danger of injury during troubleshooting!

Use a tool to actuate the limit switches, for example a screwdriver.

• Only reach into the set-up when it’s at a complete standstill.

Electrical

• Electrical connections must only be established and interrupted in the absence of voltage!

• Only use connector cables with safety plugs for electrical connections.

• Only use low-voltage (max. 24 V DC).

Pneumatics

• Do not exceed the maximum permissible pressure of 6 bar (600 kPa).

• Do not switch on the compressed air until all of the tubing connections have been completed and

secured.

• Do not disconnect tubing while under pressure.

• Danger of injury when switching compressed air on!

Cylinders may advance and retract automatically.

• Danger of accident due to tubing slipping off!

– Use shortest possible tubing connections.

– Wear safety glasses.

– In the event that tubing slips off:

Switch compressed air supply off immediately.

• Pneumatic circuit set-up:

Connect the components using plastic tubing with an outside diameter of 4 or 6 mm. Push the tubing into the push-in connector as far as it will go.

• Switch compressed air supply off before dismantling the circuit.

• Dismantling the pneumatic circuit:

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Variant A, snap-in system

Lightweight components that are not load-bearing (e.g. directional control valves). Simply clip the components into the slot on the profile plate. Release the component from the slot by actuating the blue lever.

Variant B, bolt-on system

Components with medium load capacity (e.g. actuators). These are clamped onto the profile plate using T-head bolts. The blue knurled nut is used for clamping and loosening.

Variant C, screw system

For components with high load capacity and components that are seldom removed from the profile plate (for example on-off valve with filter regulator). These components are secured with socket head screws and T-head bolts.

Observe specifications in the data sheets regarding the individual components.

A stopwatch is required in order to evaluate the control systems once they have been set up. The stopwatch is used to:

• Adjust the one-way flow control valves so that the cylinder stroke times comply with the specified

values

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X © Festo Didactic GmbH & Co. KG 541088

Technology module for pneumatics (TP100)

The TP100 technology module consists of a multitude of training materials and seminars. The subject matter is focused entirely on pneumatic control systems. Individual components included in the TP100 technology packet can also be included in any of the other modules.

Important components of the TP100

• Permanent workstation with Festo Didactic profile plate

• Compressor (230 V, 0.55 kW, max. 8 bar = 800 kPa)

• Equipment sets or individual components (e.g. cylinders, directional control valves, preset counters,

stepper modules, logic components, pneumatic proximity switches)

• Optional training materials (e.g. optical displays, 5/3-way valve, pulling/pushing load)

• Practical training models

• Complete laboratory set-ups

Training documentation

Textbooks TP101 basic level

Fundamentals of pneumatic control technology Maintenance of pneumatic equipment and systems Pneumatics/electropneumatics

Workbooks TP101 basic level

TP102 advanced level

Optional teachware Set of transparencies

Magnetic symbols, drawing template FluidSIM®_{pneumatic simulation software}

WBT Pneumatics

Set of cutaway models with storage case

Seminars

P100 Basic pneumatics for machine operators

P111 Fundamentals of pneumatics and electropneumatics

P121 Maintenance and troubleshooting for pneumatic and electropneumatic systems

P-OP Tracking down wastage – economic use of pneumatics

P-NEU Pneumatic refresher and update

IW-PEP Repair and maintenance in the field of control technology – pneumatic and electropneumatic systems

P-AL Pneumatics for further education

P-AZUBI Pneumatics and electropneumatics for trainees

Please refer to the current seminar planner for locations, dates and prices.

You’ll find further training materials in our catalogue and on the Internet. The training system for automation and technology is continuously updated and expanded. Transparencies, videos, CD ROMs and DVDs, as well as textbooks, are offered in several languages.

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Learning objectives for the basic level (TP101)

• Become familiar with the set-up and mode of operation of a single-acting cylinder.

• Become familiar with the set-up and mode of operation of a 3/2-way valve.

• Be able to recognise and sketch the various types of actuation for directional control valves.

• Be able to explain and set up direct actuation.

• Be able to analyse and evaluate circuits.

• Become familiar with the set-up and mode of operation of a double-acting cylinder.

• Become familiar with the set-up and mode of operation of a 5/2-way valve.

• Be able to explain and set up indirect actuation.

• Become familiar with the mode of operation of a 5/2-way valve with pneumatic actuation.

• Become familiar with the difference between a signalling element and a control element.

• Be able to measure pressure in pneumatic control systems.

• Be able to differentiate between the various types of flow control and use them in accordance with

specifications.

• Be able to adjust cylinder advancing and retracting speeds.

• Become familiar with one type of signal storage in pneumatic control systems.

• Be able to explain and implement AND/OR/NOT logic operations.

• Be able to explain and set up latching circuits.

• Become familiar with one option for end-position sensing in cylinders.

• Be able to combine logic operations.

• Become familiar with the set-up and mode of operation of a magnetic proximity switch.

• Be able to differentiate between 5/2-way valves and to select and use them in accordance with

specifications.

• Be able to further develop existing circuits.

• Become familiar with the set-up and mode of operation of a pressure sequence valve.

• Be able to set up pressure-dependent control systems.

• Become familiar with the set-up and mode of operation of a pressure regulator.

• Be able to analyse existing circuits and optimise them in accordance with specifications.

• Become familiar with the set-up and mode of operation of a time delay valve.

• Be able to set up circuits with oscillating motion.

• Be able to use time delay valves in accordance with specific constraints.

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XII © Festo Didactic GmbH & Co. KG 541088

Overview of learning objectives per exercise

Exercise 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Learning Objective

Become familiar with the set-up and mode of operation of a single-acting cylinder.

• • •

Become familiar with the set-up and mode of operation of a 3/2-way valve.

• • •

Be able to recognise and sketch the various types of actuation for directional control valves.

• • •

Be able to explain and set up

direct actuation. • • • •

Be able to analyse and evaluate

circuits. • •

Become familiar with the set-up and mode of operation of a double-acting cylinder.

•

Become familiar with the set-up and mode of operation of a 5/2-way valve.

• •

indirect actuation. • •

Become familiar with the difference between a signalling element and a control element.

•

Be able to measure pressure in

pneumatic control systems. •

Be able to differentiate between the various types of flow control and use them in accordance with specifications.

• •

Be able to adjust cylinder

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Exercise 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Learning Objective

Become familiar with one type of signal storage in pneumatic control systems.

•

Be able to explain and implement

AND/OR/NOT logic operations. • • • • •

latching circuits. •

Become familiar with one option for end-position sensing in cylinders.

•

Be able to combine logic

operations. • •

Become familiar with the set-up and mode of operation of a magnetic proximity switch.

•

Be able to differentiate between 5/2-way valves and to select and use them in accordance with specifications.

•

Be able to further develop

existing circuits. • •

Become familiar with the set-up and mode of operation of a pressure sequence valve.

•

Be able to set up

pressure-dependent control systems. • • • •

Become familiar with the set-up and mode of operation of a pressure regulator.

•

Become familiar with the set-up and mode of operation of a time delay valve.

•

Be able to set up circuits with

oscillating motion. •

Be able to use time delay valves in accordance with specific constraints.

•

Be able to analyse and set up

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XIV © Festo Didactic GmbH & Co. KG 541088

Equipment set for the basic level (TP101)

The equipment set has been put together for basic training in the field of pneumatic control technology. It includes all the components that are necessary for mastering the specific learning objectives and can be supplemented with any other equipment sets. A profile plate and a source of compressed air are also required in order to set up functional control systems.

Equipment set for the basic level (TP101)

Quantity Designation Order no.

2 3/2-way roller lever valve, normally closed 152866

1 3/2-way valve with pushbutton, normally open 152861

2 3/2-way valve with pushbutton, normally closed 152860

1 3/2-way valve with selector switch, normally closed 152863

1 3/2-way valve, pneumatically actuated at one end 539768

3 5/2-way double pilot valve, pneumatically actuated at both ends 539769

1 5/2-way valve with selector switch 152862

1 Double-acting cylinder 152888

2 One-way flow control valve 193967

2 Pressure gauge 152865

1 Pressure regulator with pressure gauge 539756

1 Pressure sequence valve 152884

1 Single-acting cylinder 152887

1 On-off valve with filter regulator 540691

2 Plastic tubing, 4 x 0.75, silver, 10 m 151496

2 Pneumatic proximity switch with cylinder mounting 539775

1 Pneumatic timer, normally closed 540694

1 Quick exhaust valve 539772

10 Push-in sleeve 153251

10 Push-in T-connector 153128

1 Distributor block 152896

1 Shuttle valve (OR) 539771

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Equipment set symbols

Designation Symbol

3/2-way valve with pushbutton, normally closed ₂

3 1

3/2-way valve with pushbutton, normally open

5/2-way valve with selector switch 4 2

3 5

1

3/2-way valve with selector switch

Pressure gauge

3/2-way roller lever valve, normally closed

3 1

2

Pneumatic proximity switch

3 1

2

3/2-way valve, pneumatically actuated at one end ₂

3 1 12

5/2-way valve, pneumatically actuated at one end ₄ ₂

3

5 1

14

5/2-way double pilot valve, pneumatically actuated at both ends 2 4 3 5 1 14 12

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XVI © Festo Didactic GmbH & Co. KG 541088 Designation Symbol Shuttle valve 2 1 1 Dual-pressure valve 2 1 1

Pneumatic timer, normally closed

2

3 1 t

Quick exhaust valve

2 3 1

One-way flow control valve

2 1

Pressure sequence valve

2 3 1 12 Single-acting cylinder Double-acting cylinder

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Designation Symbol

On-off valve with filter regulator

2

3

1

Pressure regulator with pressure gauge

2

3 1

Distributor block

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XVIII © Festo Didactic GmbH & Co. KG 541088

Allocation of equipment per exercise

Exercise 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Equipment

Cylinder, single-acting 1 1 1 1 1 1

Cylinder, double-acting 1 1 1 1 1 1 1 1 1 1 1 1 1 1

One-way flow control valve 2 2 1 2 2 2 2 2 2 2 1 2 2

Quick exhaust valve 1 1

Pressure gauge 2 2 1 2 1

3/2-way valve, pushbutton, normally closed

1 2 1 2 2 1 2 2 1 1 1 1

3/2-way valve, pushbutton, normally open

1 1

3/2-way valve, selector switch, normally closed

1 1 2 1

3/2-way roller lever valve, normally closed

1 1 1

Pneumatic proximity switch 2 2 2 1 2 2 2 2

3/2-way pneumatic valve 1 1

3/2-way pneumatic double pilot valve

1 1

5/2-way valve, selector switch

1 1 1

5/2-way pneumatic valve 1 1 1 1

5/2-way pneumatic double pilot valve

1 1 1 1 1 1 1 1

Shuttle valve 1 1 1 1 1

Dual-pressure valve 1 2 2 1 1 2 1 1

Pressure sequence valve 1 1 1

Pressure regulator with pressure gauge

1 2 1 1

Time delay valve, normally closed

1 1

Distributor block 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

On-off valve with filter regulator

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Practical tools for the trainer

Learning objectives

The basic learning objectives for the exercises in this module are the systematic sketching of circuit diagrams as well as the practical set-up of a control system on the profile plate. This direct interaction involving both theory and practice ensures faster, long-term learning. Each exercise has its own individual learning objectives; the specific learning objectives are documented in the matrix.

Required time

The time required for the exercises depends on the learner’s previous knowledge of the subject matter. For training a skilled labourer in metalworking or electrical installation: approx. 2 weeks. For training a

technician or engineer: approx. 1 week.

Equipment sets

The exercises and the equipment sets matched each other. For all 19 exercises you’ll only need the components included in the equipment set for TP101 basic level.

Each exercise in the basic level can be set up on a profile plate.

Structure of the exercises

All 19 exercises have the same structure and are broken down into:

• Title

• Learning objectives

• Presentation of the problem

• Parameters

• Project assignment

• Layout

• Worksheets

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Designations of the components

Pneumatic components are designated in circuit diagrams to DIN ISO 1219 2. All the components included in any given circuit have the same primary identifying number. Letters are assigned depending on each respective type of component. Consecutive numbers are assigned if several components of the same type are included within a single circuit. Pressure lines are designated with a P and are numbered separately.

Cylinders: 1A1, 2A1, 2A2 ...

Valves: 1V1, 1V2, 1V3, 2V1, 2V2, 3V1 ...

Sensors: 1B1, 1B2 ...

Signal inputs: 1S1, 1S2 ...

Accessories: 0Z1, 0Z2, 1Z1 ...

CD ROM contents

The CD ROM provides you with additional media. The worksheets and solutions have been saved as PDF files on the CD ROM that is included with the trainer’s manual.

The CD ROM contains the following folders:

• Operating instructions

• Data sheets

• Demo

• Festo catalogue

• FluidSIM® circuit diagrams

• Industrial applications

• Presentations

• Product information

• Videos

Operating instructions

Operating instructions for the various components included in the technology module are available. These instructions are helpful when using and commissioning the equipment.

Data sheets

The data sheets for the components included in the technology module are supplied along with the equipment set and are available as PDF files.

FluidSIM® demo version

A demo version of the FluidSIM® pneumatics software package is included on the CD ROM. Even this demo

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Festo catalogue

The relevant pages from the Festo catalogue will be provided with selected components. The

representations and descriptions of the components are intended to demonstrate how the components are presented in an industrial catalogue. Additional information regarding the components is also included.

FluidSIM® circuit diagrams

The FluidSIM® circuit diagrams for all 19 exercises included in the technology module are contained in this directory.

Industrial applications

Photos and graphics representing industrial applications are made available. These can be used to illustrate individual tasks. Project presentations can also be supplemented with these illustrations.

Presentations

Contains short presentations of the components included in the technology module. These can be used, for example, to create project presentations.

Product information

This directory contains product information and data sheets from Festo for the components included in the technology module. This is intended to demonstrate which information and data are available for industrial components.

Videos

Several videos of industrial applications complete the media provided with the technology module. Short clips demonstrate the applications in their actual industrial environments.

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Equipment set for the advanced level (TP102)

The equipment set for the advanced level has been put together for further training in the field of pneumatic control technology. The two equipment sets (TP101 and TP102) include components that are necessary for mastering the predefined learning objectives and can be supplemented as required with other equipment sets from the training system for automation and technology.

Equipment set for the advanced level (TP102)

Quantity Designation Order no.

1 3/2-way roller lever valve with idle return, normally closed 152867

2 3/2-way valve with pushbutton, normally closed 152860

1 3/2-way valve with mushroom actuator (red), normally open 152864

2 5/2-way double pilot valve, pneumatically actuated at both ends 539769

2 Double-acting cylinder 152888

2 One-way flow control valve 193967

2 Plastic tubing, 4 x 0.75, silver, 10 m 151496

1 Pneumatic timer, normally open 539759

2 Non-return valve, piloted non-return function 540715

1 Back pressure limit valve 152868

10 Push-in sleeve 153251

1 Stepper module 152886

20 Push-in T-connector 153128

1 Pneumatic preset counter 152877

1 Shuttle valve (OR) 539771

1 Shuttle valve, 3-way (OR) 152882

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Learning objectives for the advanced level (TP102)

• Detect end-positions without limit switches

• Understand and set up flip-flop circuits (flip-flop, double pilot valve)

• Convert a 3/2 and/or a 5/2-way valve

• Evaluate, use and adjust various sensors

• Explain the function of a back pressure end stop

• Explain the function of stepper modules

• Develop basic sequence control systems (continuous cycle)

• Implement a sequence control system with the following operating modes: automatic/manual, start and

reset

• Implement an OR operation for feedback signals

• Set and coordinate delays

• Be able to abort delay times with an OR operation

• Implement a sequence control system with idle step (3 steps)

• Describe and set up variable step repetition within a motion sequence using a preset counter

• Develop an input circuit with self-latching loop including the following functions: automatic/manual,

start, stop (at end of cycle) and reset

• Evaluate and use sensors for material sensing

• Actuate the final control element with two steps via a shuttle valve (double cylinder stroke)

• Use a proximity switch within the stroke sub-range in order to reverse cylinder motion

• Development of an input circuit for a sequence control system with secure pilot air, as well as start,

emergency stop and reset functions

• Stop the cylinder within the sub-stroke range (positioning) by pressurising at both ends (preloading)

• Adjust proximity switches in the end positions and within the sub-stroke range

• Combined use of quick exhaust valve and pressure regulator with pressure gauge

• Set up an inverted timer signal

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Exercise 1: Pressing cheeses

Learning objectives

After completing this exercise you’ll:

• Be familiar with the set-up and mode of operation of a single-acting cylinder.

• You’ll be able to calculate the piston force of a single-acting cylinder.

• Be familiar with the set-up and mode of operation of a normally closed 3/2-way valve.

• Be able to recognise and sketch the various types of actuation for directional control valves.

• Be able to explain and set up direct actuation.

Presentation of the problem

Presses are used to press cheeses into moulds during the production process. Develop a control system with which this process can be executed

Layout

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Exercise 1: Pressing cheeses

Parameters

• Use a double-acting cylinder.

• Pneumatically control the cylinder using a manually actuated valve.

Project assignment

1. Describe the mode of operation of a single-acting cylinder.

2. Describe the mode of operation of a normally closed 3/2-way valve.

3. Complete the pneumatic circuit diagram for the pressing tool.

4. Set up the control system.

5. Double-check the control system configuration.

6. Describe the mode of operation of the control system.

7. Create an equipment list.

Procedure

1. The cheeses are placed into the tool manually.

2. When the pushbutton is activated, the cylinder advances and presses the cover onto the tool.

3. The pushbutton is pressed and held until the pressing operation has been completed.

4. When the pushbutton is released, the cylinder is retracted and the tool can be accessed.

5. The cheese can be removed.

Safety note

Limit pressure at the service unit for this exercise to a maximum of3.5 bar (350 kPa). Immediately deactivate compressed air supply if the tubing slips off.

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Set-up and mode of operation of a single-acting cylinder

1 2 3 4 5

6 7

8

Circuit symbol and schematic diagram of a single-acting cylinder

– Compare the circuit symbol shown above with the schematic diagram of the single-acting cylinder.

Determine whether or not the two representations coincide with each other.

The two representations coincide with each other.

– Describe the set-up and mode of operation of a single-acting cylinder.

The compressed air flows into the cylinder’s piston chamber. Pressure is built up in the chamber and force is applied to the surface of the piston as a result. If this force exceeds static friction, the piston is advanced. Pressure is not built up to full operating pressure until the piston is fully advanced.

When this pressure drops, the integrated return spring forces the piston back into its initial position. Spring force is not great enough to move heavy loads attached to the piston rod. Hence single-acting cylinders only perform work in a single direction.

– Match up each component with the corresponding number from the above drawing.

Component Designation 3 Cylinder barrel 1 End cap 6 Bearing cap 5 Piston rod 8 Piston 7 Spring return 2 Supply port 4 Exhaust port

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Calculate the piston force of a single-acting cylinder

Theoretical piston force is calculated using the following formula:

F_th = A ⋅ p

F_th = theoretical piston force (N)

A = effective piston surface (sq. metres)

= ( )

4 D2_⋅_π

p = working pressure (Pa)

D = cylinder diameter (m)

Piston force F_eff is important in actual practice. Frictional resistance has to be taken into consideration when calculating piston force. Under normal operating conditions (pressure range of 4 to 8 bar or 400 to 800 kPa), it is assumed that friction forces (F_R) amount to roughly 10% of the theoretical piston force.

The following applies to the effective piston force of single-acting cylinders: F_eff = A ⋅ p – (F_R + F_F)

F_eff = effective piston force (N)

F_R = friction force (approx. 10% of F_th ) (N)

F_F = return spring force (N)

– Calculate the effective piston force for the advance stroke of the used cylinder with a working pressure

of 6 bar (600 kPa). A = ( ) 4 3.14 0.022⋅ _{= 0.000314} F_eff = 0.9 ⋅ A ⋅ p – F_F F_eff = 0.9 ⋅ (0.000314) ⋅ 600,000 – 13.5 F_eff = 169.56 – 13.6 = 155.96 N Note

The required data is included in the data sheet for the cylinder.

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Mode of operation of a normally closed 3/2-way valve

– Complete the circuit symbol of a manually actuated, normally closed 3/2-way valve with spring return.

2 3 1 1 2 3

Circuit symbol and schematic representation of a normally closed 3/2-way valve

– Describe the mode of operation of the 3/2-way valve.

A 3/2-way valve has 3 ports and 2 switching positions. It’s represented in the normal position. Normally closed means that compressed air cannot flow through the valve. When the pushbutton is actuated the valve is opened, thus allowing air to flow and the piston of a connected cylinder is advanced.

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Complete the pneumatic circuit diagram

– Complete the pneumatic circuit diagram for the control system and enter the port designations.

2 3 1 0Z1 0Z2 2 3 1 1A1 1S1

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Sequence description

– Set up the control system and describe its working sequence.

Initial position

Valve 1S1 is closed in its initial position. The piston rod of cylinder 1A1 is retracted.

Step 1-2

When the pushbutton on 3/2-way valve 1S1 is pressed, compressed air flows into the piston chamber of cylinder 1A1 and the piston rod is advanced.

Step 2-3

When the pushbutton is released, valve 1S1 is exhausted and cylinder 1A1 returns to its initial position due to force applied by the return spring.

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Create an equipment list

In addition to the circuit diagram, complete project documentation also includes an equipment list.

– Create an equipment list by entering the required components and their quantities in the table below.

Quantity Designation

1 Cylinder, single-acting

1 3/2-way valve with pushbutton, normally open

1 Distributor block

1 On-off valve with filter regulator

1 Compressed air source

Pneumatics Basic level

Pneumatics

Basic level

Use for intended purpose

Table of contents

Preface

Introduction

Work instructions and safety precautions

Technology module for pneumatics (TP100)

Learning objectives for the basic level (TP101)

Overview of learning objectives per exercise

Equipment set for the basic level (TP101)

Allocation of equipment per exercise

Practical tools for the trainer

Structure of the exercises

Designations of the components

CD ROM contents

Equipment set for the advanced level (TP102)

Learning objectives for the advanced level (TP102)

Exercise 1: Pressing cheeses