EN 1870-11:2003+A1:2009

SLOVENSKI STANDARD
01-november-2009
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Safety of woodworking machines - Circular sawing machines - Part 11: Semi-automatic
and automatic horizontal cross-cut sawing machines with one saw unit (radial arm saws)
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 11:
Halbautomatische und automatische waagrecht schneidende
Auslegerkreissägemaschinen mit einem Sägeaggregat (Radialsägen)
Sécurité des machines pour le travail du bois - Machines à scier circulaires - Partie 11:
Tronçonneuses automatiques et semi-automatiques à coupe horizontale (scies
circulaires radiales)
Ta slovenski standard je istoveten z: EN 1870-11:2003+A1:2009
ICS:
25.080.60 Strojne žage Sawing machines
79.120.10 Lesnoobdelovalni stroji Woodworking machines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1870-11:2003+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2009
ICS 79.120.10 Supersedes EN 1870-11:2003
English Version
Safety of woodworking machines - Circular sawing machines -
Part 11: Semi-automatic and automatic horizontal cross-cut
sawing machines with one saw unit (radial arm saws)
Sécurité des machines pour le travail du bois - Machines à Sicherheit von Holzbearbeitungsmaschinen -
scier circulaires - Partie 11: Tronçonneuses automatiques Kreissägemaschinen - Teil 11: Halbautomatische und
et semi-automatiques à coupe horizontale (scies circulaires automatische waagrecht schneidende
radiales) Auslegerkreissägemaschinen mit einem Sägeaggregat
(Radialsägen)
This European Standard was approved by CEN on 12 June 2003 and includes Corrigendum 1 issued by CEN on 20 December 2006 and
Amendment 1 approved by CEN on 6 August 2009.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1870-11:2003+A1:2009: E
worldwide for CEN national Members.

Contents
Foreword . 3
0 Introduction . 4
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 9
3.1 General . 9
3.2 Definitions . 9
4 List of significant hazards . 11
5 Safety requirements and/or measures . 14
5.1 General . 14
5.2 Controls . 14
5.2.1 Safety and reliability of control systems . 14
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 Integrated feed . 18
5.2.7 Mode selection . 18
5.2.8 Failure of the power supply . 18
5.2.9 Failure of the control circuits . 19
5.3 Protection against mechanical hazards . 19
5.3.1 Stability . 19
5.3.2 Risk of break up during operation . 19
5.3.3 Tool holder and tool design . 20
5.3.4 Braking . 21
5.3.5 Devices to minimise the possibility or the effect of ejection . 22
5.3.6 Work-piece supports and guides . 23
5.3.7 Prevention of access to moving parts . 24
5.3.8 Clamping devices . 27
5.4 Protection against non-mechanical hazards . 27
5.4.1 Fire . 27
5.4.2 Noise . 27
5.4.3 Emission of chips and dust . 28
5.4.4 Electricity . 29
5.4.5 Ergonomics and handling . 29
5.4.6 Pneumatic . 30
5.4.7 Hydraulic . 30
5.4.8 ! !!!Electromagnetic compatibility"""" . 30
5.4.9 Laser . 30
5.4.10 Static electricity . 30
5.4.11 Errors of Fitting . 30
5.4.12 Isolation . 31
5.4.13 Maintenance . 31
6 Information for use . 31
6.1 Warning devices . 31
6.2 Marking . 32
6.3 Instruction handbook . 32
Annex A (informative) Examples of safety related control systems with electronic components . 36
Annex B (normative) Dimensional tolerances of saw spindles . 39
Annex ZA (informative) !!!!Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC"""" . 41
Annex ZB (informative) !!!!Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC"""" . 42
Bibliography . 43

Foreword
This document (EN 1870-11:2003+A1:2009) has been prepared by Technical Committee CEN/TC 142,
"Woodworking machines - Safety", the secretariat of which is held by UNI.
!deleted text"
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 March 2010, and conflicting national standards shall be withdrawn at
the latest by March 2010.
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 2009-08-06 and includes Corrigendum 1 issued
by CEN on 2006-12-20.
This document supersedes EN 1870-11:2003.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
The modifications of the related CEN Corrigendum have been implemented at the appropriate places in the
text and are indicated by the tags ˜ ™.
!This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association, and supports essential requirements of the Machinery Directive.
For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
document"
Organisations contributing to the preparation of this European Standard include the European Committee of
Woodworking Machinery Manufacturer's Association “EUMABOIS”.
Annex B is normative and !Annexes A, ZA and ZB" are informative.
!EN 1870 Safety of woodworking machines — Circular sawing machines consists of the following parts:
Part 1: Circular saw benches (with and without sliding table), dimension saws and building site saws
Part 3: Down cutting cross-cut saws and dual purpose down cutting cross-cut saws/circular saw benches
Part 4: Multi-blade rip sawing machines with manual loading and/or unloading
Part 5: Circular saw -benches/up-cutting cross-cut sawing machines
Part 6: Circular sawing machines for firewood and dual purpose circular sawing machines for firewood/circular
saw benches, with manual loading and/or unloading
Part 7: Single blade log sawing machines with integrated feed table and manual loading and/or unloading
Part 8: Single blade edging circular rip sawing machines with power driven saw unit and manual loading
and/or unloading
Part 9: Double blade circular sawing machines for cross-cutting with integrated feed and with manual loading
and/or unloading
Part 10: Single blade automatic and semi-automatic up-cutting cross-cut sawing machines
Part 11: Semi-automatic and automatic horizontal cross-cut sawing machines with one saw unit (radial arm
saws)
Part 12: Pendulum cross-cut sawing machines
Part 13: Horizontal beam panel sawing machines
Part 14: Vertical panel sawing machines
Part 15: Multi-blade cross-cut sawing machines with integrated feed of the workpiece and manual loading
and/or unloading
Part 16: Double mitre sawing machines for V-cutting
Part 17: Manual horizontal cutting cross-cut sawing machines with one saw unit (manual radial arm saws)"
The European Standards produced by CEN/TC142 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-
1:2003" for a description of A, B and C standards).
˜deleted text™
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, 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 and United Kingdom.
Introduction
This European Standard 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 European Standard is a type "C“ standard as defined in !EN ISO 12100-1:2003".
The machinery concerned and the extent to which hazards, hazardous situations and events 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 C type 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 European Standard are directed to manufacturers and their authorised
representatives of semi-automatic and automatic horizontal cutting cross-cut sawing machines with one saw
unit (radial arm saws). It is also useful for designers.
This European Standard also includes examples of information which can be provided by the manufacturer to
the user.
Common requirements for tooling are given in !EN 847-1:2005".
1 Scope
!This document deals with all significant hazards, hazardous situations and events as listed in Clause 4
which are relevant to semi-automatic and automatic horizontal cutting cross-cut sawing machines with one
saw unit (radial arm saws), hereinafter referred to as "machines", designed to cut solid wood, chipboard,
fibreboard, plywood and also these materials when covered with plastic edging and/or plastic/light alloy
laminates. "
Any work-piece positioning equipment fitted to the machine is included in this European Standard.
!deleted text"
This European Standard does not apply to machines:
a) with manual feed of the saw unit; or
b) for cross cutting logs; or
c) specifically designed for sawing and/or milling roof timber frames; or
d) fitted with hydraulic braking systems.
˜NOTE 1™ Radial arm saws with manual feed of the saw unit (the saw unit is moved by hand) are dealt with in
prEN 1870-17 and prEN 61029-2-2.
For Computer Numerically Controlled (CNC) machines this European Standard does not cover hazards
related to Electro-Magnetic Compatibility (EMC).
˜NOTE 2™ The requirements of this European Standard apply to all machines whatever their method of control
e.g. electromechanical and/or electronic.
This European Standard is primarily directed to machines which are manufactured after the date of issue of
publication by CEN.
˜NOTE 3 Machines covered by this European Standard are listed under A.1.4 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."
!deleted text"
EN 574:1996, Safety of machinery — Two-hand control devices — Functional aspects — Principles for design
!EN 614-1:2006, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general
principles"
!EN 847-1:2005", Tools for woodworking — Safety requirements — Part 1: Milling tools !, " circular
saw blades
!deleted text"
!EN 894-1:1997, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 1: General principles for human interactions with displays and control actuators
EN 894-2:1997, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 2: Displays
EN 894-3:2000, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 3: Control actuators"
EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and their components –
Hydraulics
EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and their components –
Pneumatics
!EN 1005-1:2001, Safety of machinery — Human physical performance — Part 1: Terms and definitions
EN 1005-2:2003, Safety of machinery — Human physical performance — Part 2: Manual handling of
machinery and component parts of machinery
EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits
for machinery operation
EN 1005-4:2005, Safety of machinery — Human physical performance — Part 4: Evaluation of working
postures and movements in relation to machinery"
EN 1037:1995, Safety of machinery — Prevention of unexpected start-up
!deleted text"
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
EN 1760-1:1997, Safety of machinery — Pressure sensitive protective devices – Part 1: General principles for
the design and testing of pressure sensitive mats and pressure sensitive floors
EN 1760-2:2001, Safety of machinery — Pressure sensitive protection devices — Part 2: General principles
for the design and testing of pressure sensitive edges and pressure sensitive bars
!EN 50370-1:2005, Electromagnetic compatibility (EMC) — Product family standard for machine-tools —
Part 1: Emission
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 60439-1:1999, Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially
type-tested assemblies (IEC 60439-1:1999) "
EN 60529:1991, Degrees of protection provided by enclosures (IP Code) !(IEC 60529:1989)"
!EN 60825-1:2007, Safety of laser products — Part 1: Equipment classification and requirements (IEC
60825-1:2007) "
!EN 60947-4-1:2001", Low voltage switchgear and control gear — Part 4-1: Contactors and motor
starters — Electromechanical contactors and motor starters ! (IEC 60947-4-1:2000) "
!EN 60947-5-1:2004", Low voltage switchgear and control gear — Part 5-1: Control circuit devices and
switching elements — Electromechanical control circuit devices ! (IEC 60947-5-1:2003)"
!EN 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for
visual, acoustic and tactile signals (IEC 61310-1:2007) "
!CLC/TS 61496-2:2006", Safety of machinery — Electrosensitive protective equipment — !Part 2:
Particular requirements for equipment using active opto-electronic protective devices (AOPDs) (IEC 61496-
2:2006) "
EN ISO 3743-1:1995, Acoustics — Determination of sound power levels of noise sources — Engineering
methods for small, moveable sources in reverberant fields – Part 1: Comparison method for hard walled test
rooms (ISO 3743-1:1994)
EN ISO 3743-2:1996, Acoustics — Determination of sound power levels of noise sources using sound
pressure — Engineering methods for small, moveable sources in reverberant fields — Part 2: Methods for
special reverberation test rooms (ISO 3743-2:1994)
EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)
!EN ISO 3745:2003, 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 3746:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995)
EN ISO 4871:1996, Acoustics — Determination and verification of noise emission values of machinery and
equipment (ISO 4871:1996)
EN ISO 9614-1:1995, Acoustics — Determination of sound power levels of noise sources using sound
intensity — Part 1: Measurement at discrete points (ISO 9614-1:1993)
EN ISO 11202:1995, !Acoustics — Noise emitted by machinery and equipment — Measurement of
emission sound pressure levels at a work station and at other specified positions — Survey method in situ
(ISO 11202:1995) "
EN ISO 11204:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Method requiring environmental
corrections (ISO 11204:1995)
EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low noise machinery and
equipment — Part 1: Planning (ISO TR 11688-1:1995)
!EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1:
Basic terminology and methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles (ISO 12100-2:2003) "
!EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO 13849-1:2006)"
!EN ISO 13850:2008, Safety of machinery — Emergency stop — Principles for design (ISO 13850:2006)
"
!EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2008)"
!deleted text"
ISO 7960:1995, Airborne noise emitted by machine tools — Operating conditions for woodworking machines
!HD 21.1 S4:2002, Cables of rated voltages up to and including 450/750 V and having thermoplastic
insulation — Part 1: General requirements"
!HD 22.1 S4:2002, Cables of rated voltages up to and including 450/750 V and having cross-linked
insulation — Part 1: General requirements"
!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"
3 Terms and definitions
3.1 General
For the purposes of this European Standard the definitions given in !EN ISO 12100-1:2003" apply.
Additional definitions specifically needed for this European Standard are shown in Clause 3.2.
3.2 Definitions
3.2.1
cross-cutting
operation of cutting across the grain of a wooden work-piece
3.2.2
semi-automatic and automatic horizontal cutting cross-cut sawing machine with one saw unit (radial
arm saw)
machine where the saw unit has integrated feed and moves horizontally forward on an arm in a straight line
during the cutting stroke and than back to its rest position. The arm can rotate relative to the centre line of its
vertical support (pivoting) and the saw unit can cant relative to a horizontal line in direction of the arm (see
Figure 1)
Figure 1 — Example of a horizontal cutting cross-cut sawing machine with one saw unit
(semi-automatic machine)
3.2.3
semi-automatic cross-cut sawing machine
machine where the saw unit has integrated feed which is initiated manually and the work-piece is positioned
manually or by means of a positioning mechanism for cutting to length
3.2.4
automatic cross-cut sawing machine
machine where the saw unit has integrated feed, the work-piece is manually loaded and/or unloaded,
automatically positioned for cutting to pre-selected lengths and where the integrated feed of the saw unit is
initiated automatically
3.2.5
machine actuator
power mechanism used to effect motion of the machine
3.2.6
integrated feed on radial arm saws
power operated feed mechanism for the saw-blade and work-piece which is integrated with the machine and
where the saw unit with incorporated saw-blade and the work-piece are held and controlled mechanically
during the machining operation
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 use
3.2.8
!!!!displaceable machine""""
machine which is located on the floor, stationary during use and equipped with a device, normally wheels,
which allow it to be moved between locations
3.2.9
cutting area of the saw-blade
area where the saw-blade can be involved in the cutting process
3.2.10
non-cutting area of the saw-blade
area of the saw-blade where the saw-blade is not involved in the cutting process
3.2.11
cutting area of a semi-automatic and automatic radial arm saw
area defined by all possible positions in front of the fence of the saw-blade with the maximum diameter for
which the machine is designed, taking into account the saw unit's ability to cant or pivot for angled cutting and
the maximum cutting stroke and cutting depth
3.2.12
run-up time
time elapsed from the actuation of the start control device until the spindle reaches the intended speed
3.2.13
unbraked run-down time
time elapsed from the actuation of the stop control, but not the braking device (if fitted) up to spindle standstill
3.14
braked run-down time
time elapsed from the actuation of the stop control and the brake device up to spindle standstill
3.2.15
manual loading of power fed machines
operation where the work-piece is presented by the operator directly to the machine integrated feed, e.g.
rotating feed rollers, travelling table or reciprocating carriage; i.e. for which there is no intermediate loading
device to receive and transfer the work-piece from the operator to the integrated feed
3.2.16
manual unloading of power fed machines
operation where the work-piece is removed by the operator directly from the machine out feed; i.e. for which
there is no intermediate unloading device to receive and transfer the work-piece from the machine out feed to
the operator
3.2.17
!!!!information from the supplier""""
statements, sales literature, leaflets or other documents where a manufacturer (supplier) declares either the
characteristics or the compliance of the material or product to a relevant standard
4 List of significant hazards
!This clause contains all significant hazards, hazardous situations and events (see EN 1050:1996) as far as
they are dealt with in this document, 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 in accordance with Annex A of EN 1050:1996.
Table 1 — List of significant hazards
Hazards, hazardous situations and Relevant sub-
No hazardous events EN ISO 12100 clause of this
document
Part 1: Part 2:
2003 2003
1 Mechanical hazards related to:
- machine parts or workpieces:
a) shape; 4.2 4.2.1, 5.3.3, 5.3.6,
4.2.2, 5 5.3.7, 5.4 11
b) relative location; 5.2.2, 5.2.5,
5.3.6, 5.3.7.3,
5.3.7.5, 5.3.8,
5.4.5, 5.4.13
c) mass and stability (potential energy of 5.3.1
elements which may move under the
effect of gravity)
d) mass and velocity (kinetic energy of 5.3.7.3
elements in controlled or uncontrolled
motion);
e) mechanical strength. 5.3.2, 5.3.3
- accumulation of energy inside the machinery:
g) liquids and gases under pressure; 4.2 4.10, 5.5.4 5.4.6, 5.4.7
1.1 Crushing hazard 4.2.1 5.3.7, 5.3.8

1.2 Shearing hazard 5.3.7, 5.3.8

1.3 Cutting or severing hazard 5.3.2, 5.3.3,

5.3.4, 5.3.7
1.4 Entanglement hazard 5.3.7
1.5 Drawing-in or trapping hazard 5.3.7

1.6 Impact hazard 5.3.7.3, 5.3.7.4

1.8 Friction or abrasion hazard 5.3.4

1.9 High pressure fluid injection or ejection 5.3.4, 5.3.8,

hazard 5.4.6, 5.4.7,
5.4.13, 6.3
2 Electrical hazards due to:
2.1 Contact of persons with live parts (direct 4.3 4.9, 5.5.4 5.4.4, 5.4.12,
contact) 5.4.13
2.2 Contact of persons with parts which have 4.3 4.9 5.4.4, 5.4.12,
become live under faulty conditions 5.4.13
(indirect contact)
2.4 Electrostatic phenomena 4.3 4.9 5.4.10
4 Hazards generated by noise, resulting in:
Hearing loss (deafness), other 4.5 4.2.2, 5 5.4.2
4.1
physiological disorders (loss of balance,
loss of awareness)
Interference with speech communication,  5.4.2
4.2
acoustic signals.
Hazards generated by radiation
6.5 Lasers 4.7 5.4.9
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 4.8 4.3b, 4.4 5.4.3, 6.3
harmful fluids and dusts
7.2 Fire hazard 4.8 4.4 5.4.1, 5.4.3
8 Hazards generated by neglecting ergonomic principles in machinery design
related to:
8.1 Unhealthy postures or excessive effort 4.9 4.7, 4.8.2, 5.2.2, 5.4.5, 6.3
4.11.12,
5.5.5, 5.5.6
8.2 Hand-arm or foot-leg anatomy 4.9 4.8.3 5.2.2, 5.4.5, 6.3
8.4 Local lighting 4.8.6 6.3
8.6 Human error, human behaviour 4.8, 4.11.8, 6.3
4.11.10,
5.5.2, 6
8.7 Design, location or identification of 4.8.7, 5.2.2
manual controls 4.11.8
8.8 Design or location of visual display units 4.8.8, 6.2 5.2.2
5.2.3, 5.2.6,
4.11
9 Combination of hazards
5.2.7, 5.2.8,
5.3.7.4, 5.4.3,
5.4.4
Unexpected start up, unexpected overrun/overspeed (or any similar malfunction)
from:
10.1 Failure/disorder of the control system 4.11, 5.5.4 5.2.8, 5.2.9,
5.3.3.1
10.2 Restoration of energy supply after an 4.11.4 5.2.8, 5.2.9,
interruption 5.3.4, 5.4.6,
5.4.7
10.3 External influences on electrical 4.11.11 5.4.4, 5.4.8
equipment
10.6 Errors made by the operator (due to 4.9 4.8, 4.11.8, 5.2.1, 5.4.5,
mismatch of machinery with human 4.11.10, 6.3
characteristics and abilities, see 8.6) 5.5.2, 6
5.2.2, 5.2.4,
11 Impossibility of stopping the machine 4.11.1,
5.2.5
in the best possible conditions 4.11.3,
5.5.2
5.2.8, 5.2.9,
13 Failure of the power supply 4.11.1,
5.3.4, 5.4.6,
4.11.4
5.4.7
5.2.1
14 Failure of the control circuit 4.11, 5.5.4
5.3.3, 5.4.11,
15 Errors of fitting
4.9 4.7, 6.5
6.1, 6.3
5.3.2
16 Break-up during operation 4.2.2 4.3
5.2.3, 5.2.6,
17 Falling or ejected objects or fluids
4.2.2 4.3, 4.10
5.3.2, 5.3.3,
5.3.5, 5.3.6,
5.3.8
5.3.1
18 Loss of stability / overturning of 4.2.2 5.2.6
machinery
"
5 Safety requirements and/or measures
5.1 General
The machine shall comply with the safety requirements and/or protective measures of this Clause. In addition,
the machine shall be designed in accordance with the principles of Clauses 5 and 6 of
!EN ISO 12100-1:2003" for hazards relevant but not significant, which are not dealt with by this
document (e.g. sharp edges).
For guidance in connection with risk reduction by design, see !4.1 of EN ISO 12100-2:2003", and for
safeguarding measures, see !Clause 5 of EN ISO 12100-2:2003".
5.2 Controls
5.2.1 Safety and reliability of control systems
For the purposes of this European Standard a safety related control system is one from and including the
initial manual control or position detector to the point of input to the final actuator or element e.g. motor. The
safety related control systems of this machine are those for:
 starting (see Clause 5.2.3);
 normal stopping (see Clause 5.2.4);
 emergency stop (see Clause 5.2.5);
 moveable interlocked guards (see Clause 5.2.3, 5.3.7);
 moveable interlocked guards with guard locking (see Clauses 5.2.3 and 5.3.7);
 interlocking of the cutting stroke with saw-blade rotation and work-piece clamping (see Clause 5.2.3);
 on automatic machines interlocking of the powered work-piece positioning with the cutting stroke (see
Clause 5.2.6);
 mode selection (see Clause 5.2.7);
 the initiation of the braking system (see Clauses 5.2.4, 5.2.5 and 5.3.4);
 the two-hand control device (see Clauses 5.2.3 and 5.3.7);
 on semi-automatic machines interlocking of self closing power operated guards with the position of the
saw unit (see Clause 5.3.7.1);
 the active opto-electronic protective devices (light barriers) (see Clause 5.3.7.4);
 the pressure sensitive mats (see Clause 5.3.7.4);
 the mechanically actuated trip devices (trip bar) (see Clause 5.3.7.4);
 the work-piece clamping (see Clause 5.3.8).
Unless otherwise stated in this European Standard these control systems shall, as a minimum, be designed
and constructed in accordance with category 1 as defined in !EN ISO 13849-1:2008".
For the purposes of this European Standard "well tried components and principles" means for:
a) electrical components if they comply with relevant standards including the following as:
i) !EN 60947-5-1:2004" (section 3) for control switches with positive opening operation used as
mechanical actuated position detectors for interlocking guards and for relays used in auxiliary circuits;
ii) !EN 60947-4-1:2001" for electromechanical contactors and motor-starters used in main
circuits;
iii) !HD 22.1 S4:2002" for rubber-insulated cables;
iv) !HD 21.1 S4:2002" for polyvinyl chloride cable if this cable is additionally protected against
mechanical damage by positioning (e.g. inside frames);
b) electrical principles if they comply with the first four measures listed in 9.4.2.1 of
!EN 60204-1:2006". The circuits shall be either “hardwired”, or if electronic components are used in
safety related control systems “well tried” is fulfilled if they are in accordance with the requirements of
Clause 9.4.2.2 (i.e. redundancy with cross-monitoring) or 9.4.2.3 (i.e. diversity) of !EN 60204-1:2006"
(also see Annex A for examples of safety related electronic control systems);
c) mechanical components if, for example they operate in the positive mode in accordance with the
description given in !4.5 of EN ISO 12100-2:2003";
d) mechanically actuated position detectors for guards if they are actuated in the positive mode and their
arrangement/fastening and the cam design/mounting comply with the requirements of Clauses 5.2 and
5.3 of EN 1088:1995;
e) interlocking devices with guard locking if they are:
i) if the run down time of the saw spindle is less than 10 s at least an interlocking device with guard
locking with manually operated delay device in accordance with the requirements in Annex N of EN
1088:1995;
ii) in all other cases an interlocking device with spring applied/power released guard locking device
in accordance with the requirements in Annex M of EN 1088:1995;
f) pneumatic and hydraulic components and systems if they comply with the requirements of EN
983:1996 and EN 982:1996 respectively;
g) two-hand control devices if they are as a minimum of type III B in accordance with the requirements of
EN 574:1996;
h) pressure sensitive mats if they are as minimum in accordance with type 2 of EN 1760-1:1997 and if
they are tested together with their associated control circuits at least at each starting of the machine;
i) active opto-electronic protective devices (light beam) if they as minimum in accordance with type 2
of !CLC/TS 61496-2:2006" and if they are tested together with the associated control circuits at least
at each starting of the machine;
j) mechanically actuated trip devices (trip bars) if they are as minimum in accordance with type 2 of EN
1760-2:2001 and if they are tested together with their associated control circuits at least at each starting of
the machine.
Time delay devices used in hardwired safety related control circuits may be of category B in accordance with
the requirements of !EN ISO 13849-1:2008" if the time delay device is designed for at least one million
actuation.
Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the
machine. !deleted text"
!NOTE For components characteristics the information from the component supplier can be useful. "
5.2.2 Position of controls
5.2.2.1 Semi-automatic machines
The main electrical controls for starting the saw-blade spindle drive motor and normal stopping shall be
located together on the machine either:
a) below the work-piece support; or
b) on a control panel positioned:
i) behind and above the fence; and
ii) within 850 mm measured horizontally from the front edge of the work-piece support; and
iii) at a maximum height of 1600 mm from the floor level.
The two-hand control device to control the cutting stroke (also see Clause 5.2.3) shall be situated:
a) at the front of the machine within 1,0 m of the cutting line when it is at 90° to the fence;
b) below the work-piece support;
c) at a minimum height above floor level of 750 mm.
Where the control for the clamps is separate from the two-hand control device it shall be within 400 mm
measured horizontally to the two hand control device.
For the positioning of the emergency stops see Clause 5.2.5.
Verification: By checking the relevant drawings, measurement and inspection of the machine.
5.2.2.2 Automatic machines
The main electrical controls for starting the saw-blade spindle drive motor, normal stopping and work-piece
positioning mechanism shall be located together on the machine either:
a) below the work-piece support; or
b) on a control panel positioned:
i) behind and above the fence; and
ii) within 850 mm measured horizontally from the front edge of the work-piece support; and
iii) at a maximum height of 1600 mm from the floor level.
For the positioning of the emergency stops see Clause 5.2.5.
Verification: By checking the relevant drawings, measurement and inspection of the machine.
5.2.3 Starting
Before starting or restarting the machine all the safeguards shall be in place and functional. This is achieved
by the interlocking arrangements described in Clause 5.3.7. Start or restart shall only be possible by actuation
of the start control device provided for that purpose.
The initiation of the cutting stroke shall only be possible after saw-blade rotation and work-piece clamping
have been initiated.
For semi-automatic machines the saw unit cutting stroke shall be controlled by a two-hand control device of at
least type III B in accordance with the requirements of EN 574:1996.
All reset controls shall be located outside protected areas and not reachable when standing inside a protected
area.
For electrically started machines see Clause 9.2.5.2 of !EN 60204-1:2006". The exceptions described in
Clause 9.2.4 of !EN 60204-1:2006" do not apply.
Verification: By checking the relevant drawings and/or circuit diagrams, measurement, inspection and relevant
functional testing of the machine.
5.2.4 Normal stopping
The machine shall be fitted with a stop control system, which when actuated shall disconnect power from all
machine actuators and actuate the brake (if provided).
This stop control shall be of category 1 in accordance with the requirements of Clause 9.2.2 of
!EN 60204-1:2006". When initiated the stopping sequence shall be:
a) initiate the return stroke of the saw unit;
b) remove power to work-piece clamping;
c) cut power to saw spindle drive motor and initiate the brake (where fitted);
d) when braking sequence is complete, cut power to brake (if electrical brake is fitted).
The stopping sequence shall be satisfied at the level of the control circuits. If a time delay device is used, time
delay shall be at
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