Bsi bs en 00860 2007 + a2 2012

BRITISH STANDARD BS EN 860 2007 Safety of woodworking machines — One side thickness planing machines ICS 79 120 10 ����������������������������������������� �������������������������� � +A1 2009 BS EN[.]

National foreword

This British Standard is the UK implementation of

EN 860:2007+A1:2009 It supersedes BS EN 860:2007 which is withdrawn

The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

The UK participation in its preparation was entrusted to Technical Committee MTE/23, Woodworking machines

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of

a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations

This British Standard was

published under the authority

of the Standards Policy and

This British Standard is the UK implementation of

EN 860:2007+A1:2009 It supersedes BS EN 860:2007 which is withdrawn

The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

The UK participation in its preparation was entrusted to Technical Committee MTE/23, Woodworking machines

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of

a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations

This British Standard was

published under the authority

of the Standards Policy and

This British Standard is the UK implementation of

EN 860:2007+A1:2009 It supersedes BS EN 860:2007 which is withdrawn

The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !"

The UK participation in its preparation was entrusted to Technical Committee MTE/23, Woodworking machines

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of

a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations

This British Standard was

published under the authority

of the Standards Policy and

This British Standard was

published under the authority

of the Standards Policy and

This British Standard is the UK implementation of EN 860:2007+A2:2012

It supersedes BS EN 860:2007+A1:2009, which is withdrawn

NORME EUROPÉENNE

EUROPÄISCHE NORM

June 2012

English Version

Safety of woodworking machines - One side thickness planing

machines

Sécurité des machines pour le travail du bois - Machines à

raboter sur une face Dickenhobelmaschinen für einseitige Bearbeitung Sicherheit von Holzbearbeitungsmaschinen -

This European Standard was approved by CEN on 10 May 2007 and includes Amendment 1 approved by CEN on 16 July 2009 and Amendment 2 approved by CEN on 20 May 2012

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M IT É E U R O P É E N D E N O R M A LIS A T IO N EUROPÄISCHES KOMITEE FÜR NORMUNG

Contents

Foreword 4



Introduction 5



1 Scope 6



2 Normative references 6



3 Terms and definitions 8



3.1 General 8



3.2 Definitions 8



3.3 Terms 11



4 List of significant hazards 12



5 Safety requirements and/or measures 15



5.1 General 15



5.2 Controls 15



5.2.1 Safety and reliability of control systems 15



5.2.2 Position of controls 16



5.2.3 Starting 16



5.2.4 Normal stopping 17



5.2.5 Emergency stop 17



5.2.6 Failure of the power supply 18



5.2.7 Failure of the control circuit 18



5.3 Protection against mechanical hazards 19



5.3.1 Stability 19



5.3.2 Hazard of break up during operation 19



5.3.3 Cutterblock design 19



5.3.4 Braking 19



5.3.5 Devices to minimise the possibility or the effect of ejection 20



5.3.6 Work-piece support and guides 21



5.3.7 Prevention of access to moving parts 22



5.3.8 Characteristics of ##cutterblock$$ guards 23



5.4 Protection against non-mechanical hazards 23



5.4.1 Fire 23



5.4.2 Noise 23



5.4.3 Emission of chips and dust 24



5.4.4 Electricity 25



5.4.5 Ergonomics and handling 26



5.4.6 Pneumatics 27



5.4.7 Hydraulics 27



5.4.8 Electromagnetic compatibility 27



5.4.9 Supply disconnection (isolation) 27



5.4.10 Static electricity 28



5.4.11 Maintenance 28



6 Information for use 28



C.1 General 35



C.2 Test method 35



C.2.1 Preliminary remarks 35



C.2.2 Testing equipment 35



C.2.3 Projectile for guards 35



C.2.4 Sampling 35



C.2.5 Test procedure 35



C.3 Results 36



C.4 Assessment 36



C.5 Test report 36



C.6 Test equipment for impact test 36



Annex D (normative) Braking tests 40



D.1 Conditions for all tests 40



D.2 #Un-braked$$ run-down time 40



D.3 Braked run-down time 40



Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"" 42



Bibliography 46



Foreword

This document (EN 860:2007+A2:2012) has been prepared by Technical Committee CEN/TC 142

“Woodworking machines - Safety”, the secretariat of which is held by UNI

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2012, and conflicting national standards shall be withdrawn

at the latest by December 2012

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights

This document includes Amendment 1, approved by CEN on 2009-07-16 and Amendment 2, approved by CEN on 2012-05-20

This document supersedes #EN 860:2007+A1:2009$

The start and finish of text introduced or altered by amendment is indicated in the text by tags ! " and

The European Standards produced by CEN/TC 142 are particular to woodworking machines and complement the relevant A and B standards on the subject of general safety (see introduction of

#EN ISO 12100:2010$ for a description of A, B and C standards)

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom

Introduction

This document has been prepared to be a harmonised standard to provide one means of conforming to the essential safety requirements of the Machinery Directive, and associated EFTA regulations

This document is a type C standard as defined in #EN ISO 12100:2010$

The machinery concerned and the extent to which hazards, hazardous situations and events are covered are

indicated in the scope of this document

When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of other standards, for machines that have been designed and built according to the provisions of this type C standard

The requirements of this document are directed to manufacturers and their authorised representatives of one side thickness planing machines They are also useful for designers and importers

This document also includes provisions and examples of information to be provided by the manufacturer to the user

Common requirements for tooling are given in #EN 847-1:2005+A1:2007$

1 Scope

This document !specifies all significant" hazards, hazardous situations and events as listed in Clause 4, relevant to stationary and displaceable one side thickness planing machines fitted with an integrated feed and with cutterblock fixed in position and manual loading and unloading of the work-piece, hereinafter referred to

as "machines", designed to cut solid wood, chipboard, fibreboard and plywood when they are used as intended and under the conditions foreseen by the manufacturer #including reasonably foreseeable misuse$

#Machines which are designed to work wood based materials may also be used for working hardened plastic materials with similar physical characteristics as wood.$

This document does not apply to:

a) machines set up on a bench or a table similar to a bench, which is intended to carry out work in a stationary position, capable of being lifted by one person by hand;

NOTE 1 Transportable motor-operated electric tools are dealt with in #EN 61029-1:2009$ together with

#EN 61029-2-3:2011$

b) hand held planers or any adaptation permitting their use in a different mode, i.e bench mounting;

NOTE 2 Hand-held motor-operated electric tools are dealt with in #EN 60745-1:2009$ together with

#EN 60745-2-14:2009$

c) thickness planing machines where the cutterblock is adjustable for depth of cut setting

This document is not applicable to one side thickness planning machines fitted with an integrated feed and with cutterblock fixed in position which are manufactured before the date of its publication as EN

NOTE 3 Machines covered by this European Standard are listed under #3 of Annex IV$ of the Machinery Directive

2 Normative references

The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

#EN 847-1:2005+A1:2007$, Tools for woodworking — Safety requirements — Part 1: Milling tools, circular saw blades

#deleted text$

#EN 1005-4:2005+A1:2008$, Safety of machinery — Human physical performance — Part 4: Evaluation

of working postures and movements in relation to machinery

#EN 1037:1995+A1:2008$, Safety of machinery — Prevention of unexpected start-up

#EN 1088:1995+A2:2008$, Safety of machinery — Interlocking devices associated with guards —

EN 50370-2:2003, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part 2: Immunity

EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified)

EN 60439-1:19991), Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially type-tested assemblies (IEC 60439-1:1999)

EN 60529:19912), Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)

EN 61496-1:2004, Safety of machinery — Electro-sensitive protective equipment — Part 1: General requirements and tests (IEC 61496-1:2004, modified)

— Part 1: Comparison method for a hard-walled test room (ISO 3743-1:2010)$

#EN ISO 3743-2:2009$, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering methods for small, movable sources in reverberant fields — Part 2: Methods for special reverberant test rooms (ISO 3743-2:1994)

#EN ISO 3744:2010$, #Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane (ISO 3744:2010)$

#EN ISO 3745:2009$, Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)

#EN ISO 3746:2010$, #Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:2010)$

#EN ISO 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their components (ISO 4413:2010)

EN ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their components (ISO 4414:2010)$

#EN ISO 4871:2009$, Acoustics — Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996)

#EN ISO 9614-1:2009$, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points (ISO 9614-1:1993)

#EN ISO 11202:2010$, #Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure levels at a work station and at other specified positions applying approximate environmental corrections (ISO 11202:2010)$

#EN ISO 11204:2010$, #Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure levels at a work station and at other specified positions applying accurate environmental corrections (ISO 11204:2010)$

#EN ISO 11688-1:2009$, Acoustics — Recommended practice for the design of low-noise machinery and equipment — Part 1: Planning (ISO/TR 11688-1:1995)

#EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction (ISO 12100:2010)$

!EN ISO 13849-1:2008"3 ), Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006)

!EN ISO 13849-2:2008", Safety of machinery — Safety-related parts of control systems — Part 2: Validation (ISO 13849-2:2003)

HD 22.4 S4:2004, Cables of rated voltages up to and including 450/750 V and having crosslinked insulation — Part 4: Cords and flexible cables

ISO 7568:1986, Woodworking machines — Thickness planing machines with rotary cutterblock for one-side dressing — Nomenclature and acceptance conditions

ISO 7960:1995, Airborne noise emitted by machine tools — Operating conditions for woodworking machines

3 Terms and definitions

one side thickness planing machine

machine designed for cutting off layers of the upper surface of a work-piece by a cutterblock rotating around a horizontal axis, mounted at right angles to the infeed direction above the table designed to position and support the work-piece

NOTE The cutterblock is a cylindrical shaped complex tool equipped with blades with horizontal straight cutting line that cuts while rotating (see also #EN 847-1:2005+A1:2007$ for a description of the complex tool) The work-piece is fed into the machine against the direction of the cut

loading of a one side thicknessing machine

manual placing of the work-piece to an integrated feed device consisting in feed rollers

3.2.7

stationary machine

machine designed to be located on or fixed to the floor or other parts of the structure of the premises and to

be stationary during used

information from the supplier

statement, sales literature, leaflet or other documents in which a manufacturer (or supplier) declares either the characteristics of e.g a material or product or the conformity of the material or product to a relevant standard

3.2.14

machine actuator

power mechanism used to effect motion of the machine

#deleted text$

NOTE 1 Firmware or system software are examples of embedded software (EN ISO 13849-1:2008, 3.1.37).$

NOTE 2 Manufacturer means manufacturer of the system

NOTE 3 For example the operating system of a speed monitoring device

#3.2.16

application software (SRASW)

software specific to the application, implemented by the machine manufacturer, and generally containing logic sequences, limits and expressions that control the appropriate inputs, outputs, calculations and decisions necessary to meet the SRP/CS requirements

[EN ISO 13849-1:2008, 3.1.36]$

#3.2.17$$

safety related part of a control system (SRP/CS)

part or subpart(s) of a control system that responds to #safety related$ input signals and generates safety-related output signals

#NOTE 1$ The combined safety-related parts of a control system start at the point where the safety-related signals are initiated (including e.g the actuating cam and the roller of the position switch) and end at the output of the power control elements (including e.g the main contacts of the contactor) This also includes monitoring systems (3.1 of

Key

1 anti kickback fingers

2 stop for the rotation of the finger

3 infeed roller

4 outfeed roller

5 cutterblock

6 direction of feed

Figure 2 — Example of the internal of a one side thickness planing machine

4 List of significant hazards

This clause contains !all significant" hazards, hazardous situations and events (see

#EN ISO 12100:2010$), #deleted text$ identified by risk assessment as significant for the machines

as defined in the scope and which require action to eliminate or reduce the risk This document deals with these significant hazards by defining safety requirements and/ or measures or by reference to relevant standards

#These hazards are listed in Table 1:$

Table 1 — List of significant hazards

No Hazards, hazardous situations and hazardous

12100:2010

Relevant clause of this document

1 Mechanical hazards related to:

- machine parts or work-pieces due to:

a) shape;

6.2.2.1, 6.2.2.2, 6.3 5.3.1, 5.3.2, 5.3.3

c) mass and stability (potential energy of elements

which may move under the effect of gravity); 5.3.1

d) mass and velocity (kinetic energy of elements in

controlled or uncontrolled motion); 5.3.7

e) mechanical strength; 5.3.2, 5.3.3,

5.3.7, Annex A

- accumulation of energy inside the machinery by:

f) liquids and gases under pressure 6.2.10, 6.3.5.4 5.4.5, 5.4.6,

1.9 High pressure air ejection hazard 6.2.10 5.4.6

2 Electrical hazards due to:

2.1 Contact of persons with live parts (direct contact) 6.2.9, 6.3.5.4 5.4.4

2.2 Contact of persons with parts which have become live

under faulty conditions (indirect contact)

6.2.9 5.4.4

4 Hazards generated by noise, resulting in:

4.1 Hearing loss (deafness), other physiological disorders

(loss of balance, loss of awareness)

6.2.2.2, 6.3 5.4.2 4.2 Interference with speech communication, acoustic

to be continued

Table 1 — List of significant hazards (continued)

No Hazards, hazardous situations and hazardous

events EN ISO 12100:2010 Relevant clause of this

document

7 Hazards generated by materials and substances (and their constituent elements) processed or

used by the machinery

7.1 Hazards from contact with or inhalation of harmful fluids

and dusts

6.2.3, 6.2.4 5.4.3

8 Hazards generated by neglecting ergonomic principles in machinery design:

8.1 Unhealthy postures or excessive effort 6.2.7, 6.2.8,

6.2.11.12, 6.3.5.5, 6.3.5.6

6.3

8.7 Design, location or identification of manual controls 6.2.8.7, 6.2.11.8 5.2.2

8.8 Design or location of visual display units 6.2.8, 6.4.2 5.4.5, 5.4.9, 6.1,

6.2

5.2.7, 5.3.8, 5.4.9

10 Unexpected start-up, unexpected overrun/overspeed (or any similar malfunction) from:

10.1 Failure/disorder of the control system 6.2.11, 6.3.5.4 5.2.1, 5.2.2,

5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.2.7 10.2 Uncontrolled restoration of energy supply after an

interruption

6.2.11.4 5.2.6 10.3 External influences on electrical equipment 6.2.11.11 5.4.4, 5.4.8

10.6 Errors made by the operator (due to mismatch of

machinery with human characteristics and abilities, see

8.6)

6.2.8, 6.2.11.8, 6.2.11.10, 6.3.5.2, 6.4

5.4.5, 6.3

Table 1 — List of significant hazards (concluded)

No Hazards, hazardous situations and hazardous

events EN ISO 12100:2010 Relevant clause of this

document

11 Impossibility of stopping the machine in the best

possible conditions 6.2.11.1, 6.2.11.3, 6.3.5.2 5.2.4, 5.2.5, 5.3.4

13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.6

14 Failure of the control circuit 6.2.11, 6.3.5.4 5.2.1, 5.2.7,

5.3.4

16 Break-up during operation 6.2.3, 6.2.3.10 5.3.2, Annex A

17 Falling or ejected objects or fluids 6.2.3, 6.2.10 5.3.2, 5.3.3,

The machine shall comply with the safety requirements and/or protective measures of Clause 5

#In addition, the machine should be designed according to the principles of EN ISO 12100:2010 for hazards relevant but not significant, which are not dealt with by this document (e.g sharp edges of the machine frame).$

#For guidance in connection with risk reduction by design see EN ISO 12100:2010, 6.2 and for safeguarding measures see EN ISO 12100:2010, 6.3.$

 starting: #PL=c$ (see 5.2.3, 5.3.4.2);

 interlocking: #PL=c$ (see 5.2.3, 5.2.6, 5.3.7, 5.3.4.2, 5.3.7.1 and 5.3.7.2);

#deleted text$

 braking: #PL=b or PL=c$ (see 5.3.4);

 preventing of unexpected start up in the event of power supply failure: #PL=c$ (see 5.2.6 and 5.2.7);

 brake release: #PL=c$ (see 5.3.4.1, 5.3.4.2);

#deleted text$

 interlocking between the feed drive motor and the cutterblock drive motor: #PL=c$ (see 5.2.3);

 hold to run control: #PL=c$ (see 5.2.3);

 thicknessing table powered #adjustment initiation$: #PL=c$ (see 5.2.3)

Before starting or restarting the machine all the safeguards shall be in place and functional This is achieved

by the interlocking arrangement described in 5.3.7 Start or restart shall only be possible by actuation of the start control device provided for that purpose

For electrically operated machines the requirements of 9.2.5.2 of EN 60204-1:2006 shall apply and in addition: a) for the purpose of this document "operation" means rotation of the cutterblock and/or the integrated feed and/or powered adjustment;

b) #start of the feed motor shall be possible only where the cutterblock drive motor is running e.g by using

a time delay conforming to PL=b in accordance with the requirements of EN ISO 13849-1:2008 For a machine with one motor only the start of the feed shall be possible only if the cutterblock drive is running;$

− adjustment for the table shall be initiated by a start command (e.g push button) the control system of which conforms to at least PL=c in accordance with the requirements of

The safety related part of the control system (also see 5.2.1) for hold-to-run control shall be PL=c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant

functional testing of the machine

5.2.4 Normal stopping

The machine shall be fitted with a stop control system, where by the machine can be brought safely to a complete stop The stopping action shall include disconnection from energy supply of all machine actuators and actuate the brake (if fitted see 5.3.4)

#For normal stopping of PDS(SR) (power drive system, safety related) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of EN 61800-5-2:2007.$

The normal stop control system shall be of:

a) category 1 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 where the machine is fitted with an electric brake, or

b) category 0 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 where the machine is fitted

#with a spring operated mechanical brake$ or the brake is not fitted;

For a category 1 normal stop control system, the stopping sequence shall be:

1) cut at the same time power to integrated feed if driven by a separate motor and to the cutterblock motor and to the table adjustment if under preset electronic control; and apply the brake;

2) cut power to the brake after the #cutterblock$ has come to rest e.g by a time delay of fail safe technique e.g of capacity type conforming to #at least PL=c in accordance with the requirements

of EN ISO 13849-1:2008$

The design of the control #systems$ shall be such as to satisfy the normal stopping sequence requirements If a time delay device is used the time delay shall be at least equal to the braking time The time delay shall be fixed or the time delay adjustment device shall be sealed

#The safety related part of the control systems (also see 5.2.1) for normal stopping shall be at least PL=c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and/or circuits diagrams, inspection of the machine and

relevant functional testing of the machine

#For emergency stop of PDS(SR) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of

EN 61800-5-2:2007.$

For machines with separate feed motors and/or a working width greater than 500 mm and /or with preset electronic control for adjusting the height of the thicknessing table, a second emergency stop device accessible at the outfeed shall be provided

#If the machine is fitted with a spring operated mechanical brake$ without integrated feed driven by a separate motor and/or without guard locking the emergency stop function shall conform to category 0 in accordance with the requirements in 4.1.4 of #EN ISO 13850:2008$ and the emergency stop control circuit shall conform to category 0 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 and shall fulfil the requirements of 9.2.5.4.2 of EN 60204-1:2006

#If the machine is fitted with any other type of brake e.g an electrical brake$ and/or with integrated feed driven by a separate motor and/or guard locking the emergency stop function shall conform to category 1 in accordance with the requirements in 4.1.4 of #EN ISO 13850:2008$ and the emergency stop control circuit shall conform to category 0 in accordance with the requirements in 9.2.2 of EN 60204-1:2006 and shall fulfil the requirements of 9.2.5.4.2 of EN 60204-1:2006

The emergency stop devices shall conform to 10.7 of EN 60204-1:2006 and shall be at any time of self latching type

When initiated the emergency stopping sequence shall be the same as for normal stopping (see 5.2.4)

The design of the #control systems$ shall be such as to satisfy the emergency stopping sequence requirements If a time delay device is used the time delay shall be at least the maximum run-down time Either the time delay shall be fixed or the time delay adjustment device shall be sealed

#The safety related part of the control systems (also see 5.2.1) for emergency stop shall be at least PL=c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and/or circuits diagrams, inspection of the machine and

relevant functional testing of the machine

5.2.6 Failure of the power supply

The restoration of the energy supply after a supply interruption shall not result in a restart of any machine actuator in accordance with the requirements of #EN 1037:1995+A1:2008$ For electrically driven machines this is achieved e.g by providing an #under-voltage protection$ at a predetermined #under-voltage$ level in accordance with the requirements in 7.5, paragraphs 1 and 3 of EN 60204-1:2006

In the case of pneumatic and/or hydraulic supply interruption and where a dangerous movement is possible after the restoration of the supply pressure re-starting of any dangerous movement of the machine shall be prevented

Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant

functional testing of the machine

5.2.7 Failure of the control circuit

The requirements of Clause 6 of #EN 1037:1995+A1:2008$ shall apply and in addition:

Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant

functional testing of the machine

5.3 Protection against mechanical hazards

Verification: By checking the relevant drawings, inspection of the machine and for displaceable machines

performing the test in Annex B if relevant

5.3.2 Hazard of break up during operation

To reduce the probability of break up during operation the requirements of 5.3.3 and 5.3.6 apply To reduce the effect of break up during operation the requirements of 5.3.8 apply

The design of the pressure bar(s) (if provided) shall be such that their contact with the tool is impossible

Verification: By checking the relevant drawings and inspection of the machine

The braked run-down time shall be less than 10 s

#A PLr of at least c for the braking function shall be achieved.$

#Where a mechanical brake is fitted the last paragraph of 9.3.4 of EN 60204-1:2006 does not apply.$ For electrical braking systems, reverse current injection braking shall not be used

#As an exception where an electrical braking system is used and contains electronic components the control system for braking shall fulfil at least the requirements of PL=b and be designed in category 2 of EN

a) be independent from the basic control system for braking or an internal watchdog function shall be provided in the control system for braking;

b) be independent from the intention of the operator;

c) be performed at each cutterblock stop.$

A negative test shall be indicated Where the test result is negative more than three times in

#succession,$ it shall not be possible to operate the machine #A negative test result shall be indicated.$

#The diagnostic coverage (DCavg) shall be ≥ 60 %

See EN ISO 13849-1:2008 Annex E for DC estimation.$

#As an exception, a simple electronic brake (using simple electronic parts like rectifiers, transistors, triacs, diodes, resistors, thyristors) may be PL=b and designed in category 1 in accordance with the requirements of

EN ISO 13849-1:2008 if the “mean time to a dangerous failure” (MTTFd) according to Table 5 of

EN ISO 13849-1:2008 reaches a value of “high” (at least 30 years)

NOTE Complex electronic components like e.g microprocessors or PLCs cannot be considered as well tried under the scope of EN ISO 13849-1:2008 and do therefore not fulfil the requirements of category 1.$

#For calculating the probability of a dangerous failure for a simple electronic brake component with no fault detection (no DC) and no testing capability (category 1) the procedure described in Annex D of

EN ISO 13849-1:2008 can be used.$

Verification: By testing the #un-braked$ run-down time and braked run down time, if relevant, according to

the tests given in #Annex D$

5.3.4.2 Brake release

Where a control is provided to release the cutterblock brake in order to enable rotation by hand and adjustment of the cutterblock, release of the brake shall only be possible when the cutterblock has stopped turning (e.g by time delay device of fail safe technique e.g of capacity type #conforming to PL=c in accordance with the requirements of EN ISO 13849-1:2008$ between control actuation and brake release) The actuator of the brake release shall be interlocked with the cutterblock drive motor so that it is not possible

to start the motor if the brake is released The safety related part of the control system for brake release

#shall be at least PL=c in accordance with the requirements of EN ISO 13849-1:2008 (see also 5.2.1)$ Unexpected start-up shall be prevented by the following:

a) it shall only be possible to start the machine after the brake has been reset;

b) reset for the brake shall not initiate a start up of the machine

#The safety related part of the control systems (also see 5.2.1) for the interlocking function shall be at least PL=c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings, inspection of the machine and relevant functional testing of

the machine

a) shall be located before the infeed roller and be situated inside the table when seen from above;

b) shall have a resilience of at least 15Jcm-2 and a superficial hardness of at least 100 HB;

c) thickness shall be between 8 mm and 15 mm for machines with a useful working width equal to or more than 260 mm and between 3 mm and 8 mm for machines with useful working width less than

260 mm;

d) tip radius of the fingers shall not exceed 0,3 mm;

e) angle α shall conform to the values given in Figure 3 for any cutting depth for which the machine is designed, the angle β shall be more than 32° and less than 45°;

f) total lateral movement of the anti-kickback fingers that can move freely shall not exceed 1 % of the machine's useful working width;

g) fingers shall fall under their own weight to their rest position Stops shall be provided preventing their rotation around the shaft except for an angular sector corresponding to the minimum and maximum thicknessing capacity;

h) rest position of the finger tips shall be at least 2 mm below the horizontal tangent to the cutting circle outside diameter;

i) locking devices which render the anti-kickback fingers ineffective are not permitted

Figure 3 — Examples of anti-kickback fingers (the arrows indicate the direction of the feed)

Verification: By checking the relevant drawings, inspection of the machine, measurement, relevant functional

testing of the machine and performing the test in Annex A

NOTE For the components resilience and hardness a confirmation from the components' manufacturers can be useful

A mechanical end stop shall be provided to prevent contact between the table and the anti-kickback device or the cutterblock in any position

A device to limit the depth of cut shall be located at the infeed side of the machine in order to prevent the feeding of oversized (too thick) work-pieces

The table shall be provided on both sides with lateral guides to limit the dimension of the work-piece and to maintain the work-piece on the table

The width of the table between the lateral guides shall be less than or equal to the cutting width and its length shall at least extend from the cut limiting device to the outfeed roller

Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine, the test G1

of ISO 7568:1986 shall be performed and relevant functional testing of the machine

5.3.7 Prevention of access to moving parts

5.3.7.1 Guarding of cutterblock and feed mechanism

Access to moving parts of the machine (that is the cutterblock and the feed mechanism) with the exception of infeed opening and outfeed opening shall be prevented by means of fixed guard(s) and, at least for the change of the blades, by a moveable guards

#If the fixed guards are to be demounted by the user e.g for maintenance, their fixing systems shall remain attached to the guards or to the machinery when the guards are removed, e.g with un-losable screws (see 6.3 x)).$

#The movable guards shall be interlocked with the cutterblock and feed drive mechanism.$ If this moveable guard is on the top of the machine it shall be stable in the open position

#The cutterblock guards shall be in accordance with the requirements of 5.3.8

The interlocking device(s) shall comply with the requirements of EN 1088:1995+A2:2008

The safety related part of the control system for interlocking shall be at least PL=c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and/or circuits diagrams, inspection of the machine and

relevant functional testing of the machine

Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant

functional testing of the machine

5.3.8 Characteristics of ##cutterblock$$ guards

The #cutterblock$ guards shall be manufactured from one of the following materials:

a) steel having an ultimate tensile strength of at least 350 N mm-2 and a wall thickness of at least 1,5 mm; b) light alloy with the characteristics shown in Table 2;

Table 2 — Light alloy ##cutterblock$$ guard thickness and tensile strength

Ultimate tensile strength

d) cast iron with an ultimate tensile strength of at least 200 N mm-2 and a wall thickness of at least 5 mm

Verification: By checking the relevant drawings, measurements #and where plastic materials other than

polycarbonate are used by performing the test in Annex C$

NOTE for the ultimate tensile strength a confirmation from the manufacturer of the material can be useful

5.4 Protection against non-mechanical hazards

5.4.1 Fire

To minimise the risk of fire the requirement in 5.4.3 and 5.4.4 shall be met (see also 6.3 h))

The requirements in 5.3.6 apply for avoiding sparks as result of contact between cutting blades and the table

Verification: By checking the relevant drawings, inspection of the machine and relevant functional testing of

the machine

5.4.2 Noise

5.4.2.1 Noise reduction at the design stage

When designing machinery the information and technical measures to control noise at source given in

#EN ISO 11688-1:2009$ shall be taken into account Also the information given in EN ISO 11688-2:2000 may be taken into account The most relevant noise source is the rotating cutterblock

5.4.2.2 Noise emission measurement

Operating conditions for noise measurement shall comply with Annex C of ISO 7960:1995