SIST EN 1870-17:2012+A1:2015

SLOVENSKI STANDARD
01-junij-2015
9DUQRVWOHVQRREGHORYDOQLKVWURMHY.URåQHåDJHGHO5RþQHKRUL]RQWDOQH
NURåQHåDJH]DSUHþQLUH]]HQRUH]DOQRHQRWRURþQHUDGLDOQHåDJH
Safety of woodworking machines - Circular sawing machines - Part 17: Manual
horizontal cutting cross-cut sawing machines with one saw unit (radial arm saws)
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 17:
Handbetätigte waagrecht schneidende Auslegerkreissägemaschinen mit einem
Sägeaggregat (handbetätigte Radialsägen)
Sécurité des machines pour le travail du bois - Machines à scies circulaires - Partie 17:
Tronçonneuses manuelles à coupe horizontale avec une unité de sciage (scies
circulaires radiales manuelles)
Ta slovenski standard je istoveten z: EN 1870-17:2012+A1:2015
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 1870-17:2012+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 79.120.10 Supersedes EN 1870-17:2012
English Version
Safety of woodworking machines - Circular sawing machines -
Part 17: Manual horizontal cutting cross-cut sawing machines
with one saw unit (radial arm saws)
Sécurité des machines pour le travail du bois - Machines à Sicherheit von Holzbearbeitungsmaschinen -
scies circulaires - Partie 17: Tronçonneuses manuelles à Kreissägemaschinen - Teil 17: Handbetätigte waagrecht
coupe horizontale avec une unité de sciage (scies schneidende Auslegerkreissägemaschinen mit einem
circulaires radiales manuelles) Sägeaggregat (handbetätigte Radialsägen)
This European Standard was approved by CEN on 4 August 2012 and includes Amendment 1 approved by CEN on 1 March 2015.

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, Former Yugoslav Republic of Macedonia, 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
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1870-17:2012+A1:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .4
Introduction .6
1 Scope .7
2 Normative references .7
3 Terms and definitions . 10
3.1 General . 10
3.2 Definitions . 10
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 Failure of the power supply . 17
5.3 Protection against mechanical hazards . 17
5.3.1 Stability . 17
5.3.2 Risk of break-up during operation . 18
5.3.3 Tool holder and tool design . 18
5.3.4 Braking . 21
5.3.5 Workpiece supports and guides . 22
5.3.6 Prevention of access to moving parts . 24
5.3.7 Clamping devices . 27
5.4 Protection against non-mechanical hazards . 28
5.4.1 Fire . 28
5.4.2 Noise . 28
5.4.3 Emission of chips and dust . 29
5.4.4 Electricity . 30
5.4.5 Ergonomics and handling . 31
5.4.6 Pneumatics . 31
5.4.7 Electromagnetic compatibility . 32
5.4.8 Laser . 32
5.4.9 Static electricity . 32
5.4.10 Errors of fitting . 32
5.4.11 Supply disconnection (Isolation) . 32
5.4.12 Maintenance . 33
6 Information for use . 33
6.1 General . 33
6.2 Marking . 33
6.3 Instruction handbook . 34
Annex A (normative) Stability test for displaceable machines . 38
Annex B (normative) Saw spindle dimensional tolerances . 39
Annex C (normative) Impact test method for guards . 40
C.1 General . 40
C.2 Test method . 40
C.2.1 Preliminary remarks . 40
C.2.2 Testing equipment . 40
C.2.3 Projectile for guards . 40
C.2.4 Sampling. 40
C.2.5 Test procedure . 40
C.3 Results . 41
C.4 Assessment . 41
C.5 Test report . 41
C.6 Test equipment for impact test . 41
Annex D (normative) Brake tests . 43
D.1 Conditions for all tests . 43
D.2 Tests . 43
D.2.1 Un-braked run-down time . 43
D.2.2 Braked run-down time . 43
Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2006/42/EC . 44
Bibliography . 47

Foreword
This document (EN 1870-17:2012+A1:2015) 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 October 2015, and conflicting national standards shall be withdrawn at
the latest by October 2015.
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 supersedes !EN 1870-17:2012".
This document includes Amendment 1 approved by CEN on 2015-03-01.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
This document 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 the Machinery Directive 2006/42/EC, see informative Annex ZA, which is an integral part
of this document.
The main modification to the 2009 edition relates to the introduction of performance levels (PL).
Organisations contributing to the preparation of this European Standard include European Committee of
Woodworking Machinery Manufacturers Association "EUMABOIS.
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 sawbenches/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 (radial arm saws);
— Part 18: Dimension saws (at Enquiry stage at the time of publication of the present document);
— Part 19: Circular saw benches (with and without sliding table) and building site saws (at Enquiry stage at
the time of publication of the present document).
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, Former Yugoslav Republic of Macedonia, 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 stated 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 in accordance with the requirements of the provisions of this type C standard.
The requirements of this document are directed to manufacturers and their authorised representatives of
manual horizontal cutting cross-cut circular sawing machines with one saw unit (manual radial arm saws). It is
also useful for designers.
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 European Standard specifies all significant hazards, hazardous situation and events as listed in Clause 4,
relevant to stationary and displaceable manual horizontal cutting cross-cut circular sawing machines with one
saw unit (manual radial arm saws), hereinafter referred to as “machines”, designed to cut solid wood,
chipboard, fibreboard, plywood and also these materials if they are covered with plastic edging and/or plastic
laminates, when they are used as intended and under the conditions foreseen by the manufacturer including
reasonably foreseeable misuse.
NOTE 1 For the definition of stationary and displaceable machine, see 3.2.3 and 3.2.4.
The requirements of this document apply to all machines whatever their method of control
e.g. electromechanical and/or electronic.
This document does not apply to:
a) machines set up on a bench or a table similar to a bench, which are intended to carry out work in a
stationary position, capable of being lifted by one person by hand; the bench can also be an integrated
part of the machine if it consists of hinged legs which can be extended down;
NOTE 2 Transportable motor-operated electrical tools are dealt with in EN 61029-1:2009 together with
IEC 61029-2-2:1993.
b) machines fitted with hydraulically powered machine actuators;
c) machines fitted with powered work-piece positioning;
d) machines fitted with the facility for either ripping, milling (including trenching and grooving), sanding
and/or drilling;
e) machines equipped with more than one saw spindle speed;
NOTE 3 A standard to cover machines that can be used for ripping and moulding will be considered at the next
revision.
NOTE 4 Semi-automatic and automatic horizontal cutting cross-cut circular sawing machines with one saw unit (radial
arm saws) are dealt with in EN 1870-11:2003+A1:2009.
f) machines with integrated feed.
This document is not applicable to manual horizontal cutting cross-cut circular sawing machines with one saw
unit (manual radial arm saws) which are manufactured before the date of its publication as EN.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and
general principles
EN 614-2:2000+A1:2008, Safety of machinery — Ergonomic design principles — Part 2: Interactions between
the design of machinery and work tasks
EN 847-1:2005+A1:2007, Tools for woodworking — Safety requirements — Part 1: Milling tools, circular saw
blades
EN 894-1:1997+A1:2008, 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+A1:2008, Safety of machinery — Ergonomics requirements for the design of displays and
control actuators — Part 2: Displays
EN 894-3:2000+A1:2008, Safety of machinery — Ergonomics requirements for the design of displays and
control actuators — Part 3: Control actuators
EN 1005-1:2001+A1:2008, Safety of machinery — Human physical performance — Part 1: Terms and
definitions
EN 1005-2:2003+A1:2008, Safety of machinery — Human physical performance — Part 2: Manual handling
of machinery and component parts of machinery
EN 1005-3:2002+A1:2008, Safety of machinery — Human physical performance — Part 3: Recommended
force limits for machinery operation
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 — Principles for
design and selection
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)
1)
EN 60439-1:1999, Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially
type-tested assemblies (IEC 60439-1:1999)
2)
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 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for
visual, auditory and tactile signals (IEC 61310-1:2007)
EN 61800-5-2:2007, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements —
Functional (IEC 61800-5-2:2007)

1) EN 60439-1:1999 is amended by EN 60439-1:1999/A1:2004, based on IEC 60439-1:1999/A1:2004.
2) EN 60529:1991 is amended by EN 60529:1991/A1:2000, based on IEC 60529:1989/A1:1999.
EN ISO 3743-1:2010, Acoustics — Determination of sound power levels and sound energy levels of noise
sources using sound pressure — Engineering methods for small moveable sources in reverberant fields —
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 reverberation 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 method in an essentially free field over a reflecting plane
(ISO 3744:2010)
3)
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 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, Safety of machinery — Safety-related parts of controls systems — Part 1: General
principles for design (ISO 13849-1:2006)
EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2008)
ISO 7960:1995, Airborne noise emitted by machine tools — Operating conditions for woodworking machines
4)
HD 22.4 S4:2004, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation
— Part 4: Cords and flexible cables

3) EN ISO 3745:2009 is superseded by EN ISO 3745:2012.
4) HD 22.4 S4:2004 is superseded by EN 50525-2-21:2011.
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the following
apply.
3.2 Definitions
3.2.1
cross-cutting
operation of cutting across the longitudinal workpiece dimension
3.2.2
manual horizontal cutting cross-cut circular sawing machine with one saw unit (manual radial arm
saw)
machine where the saw unit has hand feed and is moved horizontally forward along an arm in a straight line
through the workpiece during the cut and then back to its initial/rest position
Note 1 to entry: See Figures 1 and 2.
Note 2 to entry: The arm can rotate around a vertical axis (pivoting) in a horizontal plane and the saw unit can rotate
about a horizontal axis (canting) parallel to the arm. The workpiece is manually positioned on and removed from the
workpiece support.
NOTE The saw blade is not in the rest position.
Figure 1 — Example 1 of a manual horizontal cutting cross-cut circular sawing machine with one saw
unit (manual radial arm saw)
Figure 2 — Example 2 of a manual horizontal cutting cross-cut circular sawing machine with one saw
unit (manual radial arm saw)
3.2.3
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
3.2.4
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
3.2.5
hand feed of the saw unit
manual movement of the saw unit incorporating the saw blade along the forward arm of the machine in
direction of the feed movement
3.2.6
machine actuator
power mechanism used to effect motion of the saw blade
3.2.7
cutting area of the saw blade
area of the saw blade where it can be involved in the cutting process
3.2.8
non-cutting area of the saw blade
area of the saw blade where it is not involved in the cutting process
3.2.9
cutting area of a radial arm saw
area formed by the maximum left and right pivoting and canting position at maximum stroke capacity of the
saw blade with the maximum saw blade diameter the machine is designed for
3.2.10
un-braked run-down time
time elapsed from the actuation of the stop control device up to spindle standstill with deactivated brake
3.2.11
braked run-down time
time elapsed from the actuation of the stop control device up to spindle standstill with activated brake
3.2.12
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
3.2.13
performance level
PL
discrete level used to specify the ability of safety-related parts of control systems to perform a safety function
under foreseeable conditions
[SOURCE: EN ISO 13849-1:2008, 3.1.23]
4 List of significant hazards
This clause contains all significant hazards, hazardous situations and events (see EN ISO 12100:2010),
identified by risk assessment as significant for the machines as defined in the scope and which require action
to eliminate or reduce the risk 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 EN ISO 12100:2010 Relevant
hazardous events clause of
this
document
1 Mechanical hazards related to:
- machine parts or workpieces:
a) shape; 6.2.2.1, 6.2.2.2, 6.3 5.3.3, 5.3.5,
5.3.7, 5.4.5
b) relative location; 5.2.2, 5.3.3,
5.3.5, 5.3.6,
5.3.7, 5.4.3,
5.4.5
d) mass and velocity (kinetic energy of 5.3.3, 5.3.7
elements in controlled or uncontrolled
motion);
e) mechanical strength. 5.3.2, 5.3.3
- accumulation of energy inside the machinery:
f) elastic elements (springs); 6.2.10, 6.3.5.4 5.3.3.5
g) gases under pressure; 5.2.5, 5.3.7,
5.4.12
1.1 Crushing hazard  5.3.6
1.2 Shearing hazard 5.3.6
1.3 Cutting or severing hazard 5.3.3.5,
5.3.3.6,
5.3.6
1.4 Entanglement hazard 5.3.6
1.5 Drawing-in or trapping hazard 5.3.6
1.6 Impact hazard 5.3.7
1.7 Stabbing or puncture hazard 5.3.6.1
1.8 Friction or abrasion hazard 5.3.6.1
1.9 High pressure fluid injection or ejection 6.2.10 5.4.6
hazard
2 Electrical hazards due to:
2.1 Contact of persons with live parts 6.2.9, 6.3.5.4 5.4.4
(direct contact)
2.2 Contact of persons with parts which 6.2.9 5.4.4
have become live under faulty
conditions (indirect contact)
2.4 Electrostatic phenomena 6.2.9 5.4.9
No Hazards, hazardous situations and EN ISO 12100:2010 Relevant
hazardous events clause of
this
document
4 Hazards generated by noise, resulting in:
4.1 Hearing loss (deafness), other 6.2.2.2, 6.3 5.4.2
physiological disorders (loss of
balance, loss of awareness)
4.2 Interference with speech 5.4.2
communication, acoustic signals.
6 Hazards generated by radiation
6.5 Lasers 6.3.4.5 5.4.8
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 6.2.3, 6.2.4 5.4.3
of harmful fluids and dusts
7.2 Fire hazard 6.2.4 5.4.1
8 Hazards generated by neglecting ergonomic principles in machinery
design
8.1 Unhealthy postures or excessive effort 6.2.7, 6.2.8, 5.2.2, 5.4.5
6.2.11.12, 6.3.5.5,
6.3.5.6
8.2 Hand-arm or foot-leg anatomy 6.2.8.3 5.4.5
8.6 Human error, human behaviour 6.2.8, 6.2.11.8, 5.2.1, 5.2.3,
6.2.11.10, 6.3.5.2, 5.4.10
6.4
8.7 Design, location or identification of 4.8.7, 4.11.8 5.2.2,
manual controls 5.4.11
8.8 Design or location of visual display 6.2.8.8, 6.4.2 5.3.3.5,
units 5.4.5
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
10.2 Uncontrolled restoration of energy 6.2.11.4 5.2.5
supply after an interruption
10.3 External influences on electrical 6.2.11.11 5.4.7
equipment
10.6 Errors made by the operator (due to 6.2.8, 6.2.11.8, 5.4.10, 6.3
mismatch of machinery with human 6.2.11.10, 6.3.5.2,
characteristics and abilities, see 8.6) 6.4
11 Impossibility of stopping the
6.2.11.1, 6.2.11.3, 5.2.4, 5.3.4
machine in the best possible 6.3.5.2
conditions
13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.5
14 Failure of the control circuit 6.2.11, 6.3.5.4 5.2.1
No Hazards, hazardous situations and EN ISO 12100:2010 Relevant
hazardous events clause of
this
document
15 Errors of fitting
6.2.7, 6.4.5 5.4.10
16 Break-up during operation 6.2.3 5.3.2, 5.3.3
17 Falling or ejected objects 6.2.3, 6.2.10 5.3.3.5
18 Loss of stability / overturning of 6.3.2.6 5.3.1
machinery
5 Safety requirements and/or measures
5.1 General
The machine shall comply with the safety requirements and/or protective measures of Clause 5.
NOTE 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.
In addition, the machine should be designed in accordance with 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).
5.2 Controls
5.2.1 Safety and reliability of control systems
5.2.1.1 General
For the purpose of this document, safety related part of a control system means the system from the initial
actuator or position detector or sensor up to and including the power control element of the final machine final
actuator e.g. motor or brake. Safety related parts of the control system of this machine comprise parts
concerning the following functions and they shall fulfil at least the requirements of the PL given below in
accordance with the requirements of EN ISO 13849-1:2008:
— starting and restarting: PL=c (see 5.2.3);
— normal stopping: PL=c (see 5.2.4);
— prevention of unexpected start-up after failure of the power supply: PL=c (see 5.2.5);
— the braking system: PL=b or PL=c (see 5.2.4, 5.3.4);
— monitoring of the clamp-closing pressure (if workpiece clamping is fitted): PL=c (see 5.3.7).
Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine.
5.2.1.2 Use of protective devices
Protective devices shall be in accordance with the specific standards. For the devices listed below the
following requirements apply:
a) magnetic/proximity switches shall be in accordance with the requirements of EN 1088:1995+A2:2008, 6.2
and the related control system shall be at least PL=c in accordance with the requirements of
EN ISO 13849-1:2008;
b) if a time delay is used it shall be of fail safe technique e.g. of capacity type conforming to the
requirements of at least 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,
measurement and relevant functional testing of the machine.
NOTE For the components characteristics a confirmation from the components' manufacturers can be useful.
5.2.2 Position of controls
The start and stop control for the saw spindle drive motor shall be situated either:
a) incorporated in, or adjacent to the handle for operating the saw unit of the machine but not more than
600 mm from front edge of the workpiece support when the saw unit is in its rest position; or
b) at the front of the machine below the workpiece support and at a minimum height of 600 mm from the
floor level and within 1,0 m of the cutting line when it is at 90° to the fence.
If fitted with pneumatic work-piece clamping the controls for clamping and unclamping shall be either:
1) where a manually operated controls device is used, situated at the front of the machine below the work-
piece support;
2) where a foot pedal is used, situated on the floor within 1,0 m of the cutting line when it is at 90° to the
fence;
Where an automatically operated switch is used, it shall be ensured that the work-piece is securely clamped
before chipping commences.
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 arrangement described in 5.3.6.
NOTE Starting means switching on the saw spindle drive motor.
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 EN 60204-1:2006, 9.2.5.2 apply.
The direction of the rotation of the saw spindle shall be such, that the cutting force of the saw blade is directed
against the fence.
The safety related part of the control system for starting the rotation of the spindle (see 5.2.1) shall conform to
at least 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 actuators unless STO
in accordance with EN 61800-5-2:2007 is used and actuate the brake (if provided, see 5.3.4).
For normal stopping of PDS(SR) (power drive system, safety related) see EN 61800-5-2:2007, 4.2.2.2 "safe
torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)”.
The normal stop control systems for machines fitted with spring operated mechanical brake shall comply with
stop category 0 in accordance with the requirements in EN 60204-1:2006, 9.2.2.
The normal stop control system for machines fitted with any other type of brake e.g. electrical brake and for
machines fitted with spring operated mechanical brake and pneumatic work piece clamping shall comply with
stop category 1 in accordance with the requirements in EN 60204-1:2006, 9.2.2.
Where a category 1 stop control is fitted, the stopping sequence shall be:
a) cut power to all machine actuators except workpiece clamping (if fitted) and actuate the brake;
b) cut power to brake (if electrical brake is fitted) after the saw spindle has come to rest e.g. by using a time
delay in accordance with 5.2.1.2 b).
The design of the control systems shall be such as to satisfy the normal stopping sequence. If a time delay
device is used, time delay shall at least equal 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 system for normal stopping the rotation of the spindle (see 5.2.1) shall
conform to at least PL=c in accordance with the requirements of EN ISO 13849-1:2008.
Verification: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional
testing of the machine.
5.2.5 Failure of the power supply
In the case of supply interruption for electrically driven machines, automatic restart after the restoration of the
supply voltage shall be prevented. See also EN 60204-1:2006, 7.5, paragraphs 1 and 3.
In the case of supply interruption for pneumatic pressure clamping (if fitted) of the workpiece shall be
maintained. Where non-return valves are used to meet this requirement, they shall be fitted to the actuating
cylinder.
Verification: By checking the relevant drawings and/or circuit diagrams, measurement, inspection of the
machine and relevant functional testing of the machine.
5.3 Protection against mechanical hazards
5.3.1 Stability
It shall be possible to fix stationary machines to a suitable stable structure e.g. floor. Facilities for fixing are
e.g. fixing holes in the machine frame (see also 6.3 h)).
Displaceable machines shall have the facility to make them stable during cutting.
Such facilities are e.g.:
a) brakes for the wheels; or
b) a combination of wheels and stabilisers ; or
c) a device to retract the wheels from the floor.
Verification: By checking relevant drawings, inspection on the machine and performing the stability test
described in Annex A.
5.3.2 Risk of break-up during operation
The guards for the saw blade shall be manufactured from materials with at least the following properties:
-2
a) steel with an ultimate tensile strength of at least 350 N mm and a wall thickness of at least 1, 5 mm;
b) light alloy with characteristics in accordance with Table 2;
Table 2 — Characteristics of light alloy saw-blade guards
Ultimate tensile strength Minimum thickness
-2
N mm mm
180 5
240 4
300 3
360 2
c) polycarbonate with a wall thickness of at least 3 mm or other plastic material passing the test in Annex C;
-2
d) cast iron with an ultimate tensile strength of at least 200 N mm and a wall thickness of at least 5 mm.
Verification: By checking the relevant drawings, tensile strength, measurement, for materials with
characteristics other than those given for polycarbonate in c) above by performing the test in Annex C and
inspection of the machine.
NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful.
5.3.3 Tool holder and tool design
5.3.3.1 Saw blade design
If the machine is fitted with saw blades, they shall be in accordance with the requirements of
EN 847-1:2005+A1:2007.
See also 6.3 j).
Verification: By checking the relevant drawings and inspection of the machine.
5.3.3.2 Saw spindle design
-2
The saw spindle shall be manufactured from steel with an ultimate tensile strength of at least 580 N mm and
fulfil at least the tolerances given in Annex B.
Verification: By checking the relevant drawings, measurement and relevant functional testing of the machine.
NOTE For the ultimate tensile strength a confirmation from the manufacturer of the m
...