SIST EN 1870-4:2002
(Main)Safety of woodworking machines - Circular sawing machines - Part 4: Multiblade rip sawing machines with manual loading and/or unloading
Safety of woodworking machines - Circular sawing machines - Part 4: Multiblade rip sawing machines with manual loading and/or unloading
This European Standard sets out the requirements and/or measures to remove the hazards and limit the risk on single blade and multi-blade rip sawing machines designed to cut solid wood, chipboard, fibreboard, plywood and also these materials where they are covered with plastic edging and/or plastic/light alloy laminates. This European standard covers all the hazards relevant to this machine.
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 4: Mehrblattkreissägemaschinen für Längsschnitt mit Handbeschickung und/oder Handentnahme
Diese Europäische Norm beschreibt die Anforderungen und/oder Maßnahmen für die Beseitigung von Ge-fährdungen und zur Begrenzung der Risiken an den in 3.1 definierten Mehrblattkreissägemaschinen für Längs-schnitt mit Handbeschickung und/oder Handentnahme - im Folgenden als ?Maschinen" bezeichnet -, die kon-struiert sind zum Schneiden von Massivholz, Spanplatten, Faserplatten oder Sperrholz sowie diesen Werkstof-fen, wenn sie mit Kunststoffkanten versehen und/oder kunststoff/aluminium-beschichtet sind.
Diese Europäische Norm behandelt die für diese Maschine zutreffenden Gefährdungen, wie sie in Abschnitt 4 aufgelistet sind.
Diese Europäische Norm gilt nicht für Maschinen mit senkrechtem Rollenvorschub oder senkrechtem Plat-tenbandvorschub, die zum Herstellen des ersten Längsschnitts an einem Holzstamm bestimmt sind.
Diese Europäische Norm behandelt bei CNC-Maschinen nicht die Gefährdungen im Zusammenhang mit der elektromagnetischen Verträglichkeit (EMV).
Diese Europäische Norm gilt in erster Linie für Maschinen, die nach dem Ausgabedatum dieser Europäischen Norm hergestellt werden.
Sécurité des machines pour le travail du bois - Machines a scies circulaires - Partie 4: Scies circulaires a déligner multilames a chargement et/ou déchargement manuel
1 Domaine d'application
La présente norme européenne fixe les spécifications et/ou les mesures qui doivent etre prises pour éliminer les phénomenes dangereux et/ou limiter les risques sur les scies circulaires a déligner multilames, a chargement et/ou déchargement manuels définies en 3.1, (ci-apres désignées "machines"), conçues pour usiner du bois massif, des panneaux de particules, des panneaux de fibres, de contre-plaqué, et également ces matériaux lorsque leurs surfaces ou leurs chants sont recouverts de plastique ou d'alliages légers.
La présente norme couvre tous les phénomenes dangereux présentés par ces machines. Une liste de ces phénomenes dangereux est fournie a l'article 4.
La présente norme européenne ne s'applique pas aux machines munies d'un dispositif d'amenage vertical a rouleaux ou a tapis a chaîne, ni aux machines conçues pour effectuer la premiere coupe en long d'une grume.
La présente norme européenne ne couvre pas les phénomenes dangereux liés a la compatibilité électromagnétique (CEM) pour les machines a commande numérique (CNC).
La présente norme européenne est applicable avant tout aux machines fabriquées apres la date de publication de la présente norme.
Safety of woodworking machines - Circular sawing machines - Part 4: Multiblade rip sawing machines with manual loading and/or unloading
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1870-4:2002
01-januar-2002
Safety of woodworking machines - Circular sawing machines - Part 4: Multiblade
rip sawing machines with manual loading and/or unloading
Safety of woodworking machines - Circular sawing machines - Part 4: Multiblade rip
sawing machines with manual loading and/or unloading
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 4:
Mehrblattkreissägemaschinen für Längsschnitt mit Handbeschickung und/oder
Handentnahme
Sécurité des machines pour le travail du bois - Machines a scies circulaires - Partie 4:
Scies circulaires a déligner multilames a chargement et/ou déchargement manuel
Ta slovenski standard je istoveten z: EN 1870-4:2001
ICS:
25.080.60 Strojne žage Sawing machines
79.120.10 Lesnoobdelovalni stroji Woodworking machines
SIST EN 1870-4:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 1870-4:2002
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SIST EN 1870-4:2002
EUROPEAN STANDARD
EN 1870-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2001
ICS 79.120.10
English version
Safety of woodworking machines - Circular sawing machines -
Part 4: Multiblade rip sawing machines with manual loading
and/or unloading
Sécurité des machines pour le travail du bois - Machines à Sicherheit von Holzbearbeitungsmaschinen -
scies circulaires - Partie 4: Scies circulaires à déligner Kreissägemaschinen - Teil 4:
multilames à chargement et/ou déchargement manuel Mehrblattkreissägemaschinen für Längsschnitt mit
Handbeschickung und/oder Handentnahme
This European Standard was approved by CEN on 19 January 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1870-4:2001 E
worldwide for CEN national Members.
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EN 1870-4:2001
CONTENTS
Foreword . 3
Introduction . 3
1 Scope . 3
2 Normative References . 4
3 Terms and definitions. 6
4 List of hazards. 9
5 Safety requirements and/or measures. 11
5.1 Controls . 12
5.2 Protection against mechanical hazards . 15
5.3 Protection against non-mechanical hazards. 27
6 Information for use. 31
6.1 Warning devices . 31
6.2 Marking. 31
6.3 Instruction handbook . 31
Annex A (normative) Dimensional tolerances of saw spindles . 33
Annex B (informative) Safe working practice. 34
Annex ZA (informative) Relationship of this document with EC Directives . 36
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EN 1870-4:2001
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 142 "Woodworking machines
- Safety", the secretariat of which is held by BSI.
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 September 2001, and conflicting national standards shall be
withdrawn at the latest by September 2001.
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 EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard.
Organisations contributing to the preparation of this European Standard include European Committee of
Woodworking Machinery Manufacturers Association "EUMABOIS".
Annex A is normative, the annexes B and ZA are informative.
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 292-1 : 1991 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, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland and the 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 292-1 : 1991.
The extent to which hazards are covered is indicated in the scope of this European Standard.
The requirements of this European Standard concern designers, manufacturers, suppliers and importers of
multiblade rip sawing machines with manual loading and/or unloading.
This European Standard also includes information to be provided by the manufacturer to the user.
Common requirements for tooling are given in EN 847-1 : 1997.
1Scope
This European Standard sets out the requirements and/or measures to remove the hazards and limit the risk
on multiblade rip sawing machines with manual loading and/or unloading as defined in 3.1, herein after
referred to as „machines“, designed to cut solid wood, chipboard, fibreboard, plywood and also these
materials where they are covered with plastic edging and/or plastic/light alloy laminates.
This European Standard covers the hazards relevant to this machine as stated in clause 4.
This European Standard does not apply to machines with vertical roller feed or vertical chain conveyor feed
or machines designed to make the first rip cut on a log.
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EN 1870-4:2001
For Computer Numerically Controlled machines (CNC) this European Standard does not cover hazards
related to electromagnetic compatibility (EMC).
This European Standard is primarily directed at machines which are manufactured after the date of issue of
this European Standard.
2 Normative References
This European Standard incorporates, by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies (including amendments).
EN 292 - 1 : 1991 Safety of machinery - Basic concepts, general principles for design - Part 1 :
Basic terminology, methodology
EN 292 - 2 : 1991 Safety of machinery - Basic concepts, general principles for design - Part 2 :
EN 292-2/A1 : 1995 Technical principles and specifications
EN 294 : 1992 Safety of machinery - Safety distances to prevent danger zones being reached
by the upper limbs
EN 418 : 1992 Safety of machinery - Emergency stop equipment, functional aspects -
Principles for design
EN 847-1 : 1997 Tools for woodworking - Safety requirements - Part 1 : Milling tools and
circular sawblades
EN 954-1 : 1996 Safety of machinery - Safety-related parts of control systems - Part 1 :
General principles for design
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 1088 : 1995 Safety of machinery. - Interlocking devices with and without guard locking -
Principles for design and selection
prEN 1760-2 : 1996 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 60204-1 : 1992 Safety of machinery - Electrical equipment of machines - Part 1: General
requirements (IEC 60204-1 : 1992 modified)
EN 60529 : 1991 Degrees of protection provided by enclosures (IP Code) (IEC 529: 1989)
EN 60825-1 : 1994 Safety of laser products – Part 1: Equipment classification, requirements and
user's guide (IEC 825-1 : 1993)
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EN 60947-4-1 : 1992 Low voltage switchgear and control gear - Part 4: Contactors and motor
starters – Section 1: Electromechanical contactors and motor starters
(IEC 60947-4-1 : 1990)
EN 60947-5-1 : 1997 Low voltage switchgear and control gear - Part 5-1: Control circuit devices
and switching elements – Electromechanical control circuit devices
(IEC 60947-5-1 : 1997)
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 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 – Declaration 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 workstation 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 the workstation 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)
ISO 3745 : 1977 Acoustics - Determination of sound power levels of noise sources - Precision
methods for anechoic and semi-anechoic rooms
ISO 7960 : 1995 Airborne noise emitted by woodworking machine tools -
Operating conditions for woodworking machines
HD 21.1 S3 : 1997 Polyvinyl chloride insulated cables of rated voltages up to and including
450/750V - Part 1: General requirements
HD 22.1 S3 : 1997 Rubber insulated cables of rated voltages up to and including 450/750V - Part
1: General requirements
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3 Terms and definitions
For the purposes of this European Standard the following terms and definitions apply :
3.1 multiblade rip sawing machine
a machine designed to be used with sawblades at different positions on the spindle(s) which are fixed in
position during cutting, where the workpiece is fed to the blades by an integrated power feed e.g. rollers,
chain conveyor or chain bed, and which has manual loading and/or unloading. The sawblades can be
mounted on one or more saw spindle(s) which may be capable of vertical adjustment. The sawblades may be
capable of axial adjustment. The sawblade spindle(s) may be arranged so that they are :
a) all mounted above the workpiece support;
b) all mounted below the workpiece support;
c) mounted both above and below the workpiece support.
The cutting mode can be ‘against the feed’ (see figure 1a).or ‘climb cutting’ (see figure 1b) or a combination
of both.
Key
1 Sawblade not moved
2 Sawblade
3 Feed
4 Workpiece
5 Feed
6 Workpiece not moved
Figure 1a) - Cutting against the feed: Direction of the workpiece feed in relation to the sawblade
rotation
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EN 1870-4:2001
Key
1 Sawblade not moved
2 Sawblade
3 Feed
4 Workpiece
5 Feed
6 Workpiece not moved
Figure 1b) - Climb cutting: Direction of the workpiece feed in relation to the sawblade rotation
3.2 machine actuator
a power mechanism used to effect motion of the machine.
3.3 integrated feed
a feed mechanism for the workpiece (or tool) which is integrated with the machine and where the workpieces
(or machine element with incorporated tool) are held and controlled mechanically during the machining
operation.
NOTE In the case of machines covered by this European Standard, integrated feed is in the form of rollers,
chain conveyor or chain bed. The words in brackets are not applicable to the machine covered by this
European Standard.
3.4 stationary machine
a 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.
3.5 loading the machine
the manual or automatic placing of the workpiece onto a carriage, magazine, lift, hopper, moveable bed,
conveyor or the presentation of the workpiece to an integrated feed device.
3.6 cutting against the feed
when the relative direction of the tool to the workpiece is as illustrated in figure 1 a).
3.7 climb cutting
when the relative direction of the tool to the workpiece is as illustrated in figure 1 b).
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3.8 ejection
the unexpected movement of the workpiece, parts of it, or part of the machine from the machine during
processing.
3.9 kickback
a particular form of ejection describing the unexpected movement of the workpiece or divided parts of it
opposite to the direction of feed during processing.
3.10 anti-kickback fingers
moveable elements at the infeed or the outfeed of the machine to prevent kickback of the workpiece or
divided parts of it.
3.11 anti-splinter fingers
moveable elements at the infeed of the machine to prevent the ejection of splinters.
3.12 run-up time
the time elapsed from the actuation of the start control device until the spindle speed reaches the intended
speed.
3.13 run-down time
the time elapsed from the actuation of the stop control device up to spindle standstill.
3.14 cutting width capacity
the maximum distance between the two outside sawblades, or, where a single sawblade is used, the
maximum distance between the sawblade and fence.
3.15 manual loading of power fed machines
where the workpiece 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 workpiece from the operator to the integrated feed.
3.16 manual unloading of power fed machines
where the workpiece is removed by the operator directly from the machine outfeed, i.e. for which there is no
intermediate unloading device to receive and transfer the workpiece from the machine outfeed to the
operator.
3.17 confirmation
statements, sales literature, leaflets or other documents where the manufacturer (or supplier) declares either
the characteristics or the compliance of the material or product, to a relevant standard.
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4List of hazards
This European Standard deals with all hazards listed and relevant to the machines as defined in the scope :
- for significant hazards by defining safety requirements and/or measures or by reference to relevant
type B standards;
- for hazards which are not significant e.g. general, minor or secondary hazards by reference to relevant
type A or B standards, especially EN 292-1 : 1991 and EN 292-2 : 1991/A1 : 1995.
These hazards are listed in table 1 in accordance with annex A of EN 292-2 : 1991/A1 : 1995.
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Table 1 - List of hazards
Number Hazard Relevant clause of this
standard
1 Mechanical Hazards (caused for example by :
- shape
- relative location
- mass and stability (potential energy of elements)
- mass and velocity (kinetic energy of elements)
- inadequacy of the mechanical strength
- accumulation of potential energy by :
. elastic elements (springs) or
. liquid or gases under pressure, or
. vacuum
of the machine parts or workpieces).
1.1 Crushing hazard 5.2.5, 5.2.6, 5.2.7
1.2 Shearing hazard 5.2.5, 5.2.6, 5.2.7
1.3 Cutting or severing hazard 5.2.2, 5.2.3, 5.2.4, 5.2.5,
5.2.6, 5.2.7
1.4 Entanglement hazard 5.2.7
1.5 Drawing-in or trapping hazard 5.2.7
1.6 Impact hazard 5.2.2, 5.2.5
1.7 Stabbing or puncture hazard 5.2.2, 5.2.5
1.8 Friction or abrasion hazard Not relevant
1.9 High pressure fluid injection hazard 5.3.7, 5.3.8
1.10 Ejection of parts (of machinery and processed 5.2.2, 5.2.5, 5.2.7
material/workpieces)
1.11 Loss of stability (of machinery and machine parts) 5.2.1
1.12 Slip, trip and fall hazards in relationship with machinery 5.2.7
(because of their mechanical nature)
2 Electrical hazards, caused for example by :
2.1 Electrical contact (direct or indirect) 5.3.4, 5.3.16
2.2 Electrostatic phenomena Not relevant
2.3 Thermal radiation or other phenomena such as ejection of Not relevant
molten particles, and chemical effects from short circuits,
overloads etc.
2.4 External influences on electrical equipment 5.1.1, 5.3.4, 5.3.12
3 Thermal hazards resulting in :
3.1 Burns and scalds, by a possible contact of persons, by 5.3.1
flames or explosions and also by the radiation of heat
sources
3.2 Health damaging effects by hot or cold work environment Not relevant
4 Hazards generated by noise resulting in :
4.1 Hearing loss (deafness) other physiological disorders (e.g. 5.3.2
loss of balance, loss of awareness)
4.2 Interference with speech communication, acoustic signals 5.3.2
etc.
5 Hazards generated by vibration (resulting in a variety of Not relevant
neurological and vascular disorders)
6 Hazards generated by radiation, especially by :
6.1 Electric arcs Not relevant
6.2 Lasers 5.3.13
(continued)
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Table 1 - List of hazards (concluded)
Number Hazard Relevant clause of this
standard
6.3 Ionising radiation sources Not relevant
6.4 Machines making use of high frequency electrical fields Not relevant
7 Hazards generated by materials and substances processed,
used or exhausted by machinery for example :
7.1 Hazards resulting from contact with or inhalation of 5.3.3
harmful fluids, gases, mists, fumes and dust
7.2 Fire or explosion hazard 5.3.1, 5.3.3
7.3 Biological and microbiological (viral or bacterial hazards) Not relevant
8 Hazards generated by neglecting ergonomic principles in
machine design (mismatch of machinery with human
characteristics and abilities) caused for example by :
8.1 Unhealthy posture or excessive efforts 5.1.2
8.2 Inadequate consideration of human hand-arm or foot-leg 5.1.2
anatomy
8.3 Neglected use of personal protective equipment 6.3, Annex B
8.4 Inadequate area lighting Annex B
8.5 Mental overload or underload, stress etc. Not relevant
8.6 Human error 6.3
9 Hazard combinations Not relevant
10 Hazards caused by failure of energy supply, breaking
down of machinery parts and other functional disorders,
for example :
10.1 Failure of energy supply (of energy and/or control 5.1.7
circuits)
10.2 Unexpected ejection of machine parts or fluids 5.2.2, 5.2.5, 5.3.7, 5.3.8
10.3 Failure, malfunction of control system (unexpected start 5.1.1
up, unexpected overrun)
10.4 Errors of fitting 6.3
10.5 Overturn, unexpected loss of machine stability 5.2.1
11 Hazards caused by (temporary) missing and/or incorrectly
positioned safety related measures/means, for example :
11.1 All kinds of guard 5.2.7
11.2 All kinds of safety related protection devices 5.2.5, 5.2.6, 5.2.7
11.3 Starting and stopping devices 5.1.2, 5.1.3, 5.1.4
11.4 Safety signs and signals Not relevant
11.5 All kinds of information and warning devices 5.1.2, 6.2, 6.3
11.6 Energy supply disconnecting devices 5.3.16
11.7 Emergency devices 5.1.5
11.8 Feeding/removal means of workpieces 5.2.6
11.9 Essential equipment and accessories for safe adjusting 5.3.17
and/or maintaining
11.10 Equipment evacuating gases, etc. 5.3.3
5 Safety requirements and/or measures
For guidance in connection with risk reduction by design, see clause 3 of EN 292-2 : 1991, and in addition :
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5.1 Controls
5.1.1 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 5.1.3);
- normal stopping (see 5.1.4);
- emergency stop (see 5.1.5);
- braking system (see 5.2.4);
- axial adjustment (see 5.2.2);
- interlocking (see 5.2.7);
- interlocking with guard locking (see 5.2.7);
- hold-to-run control device (see 5.1.6).
These control systems shall, as a minimum, be designed and constructed using “well tried components and
principles”.
For the purposes of this European Standard “well tried components and principles” means:
a) electrical components if they comply with relevant standards including the following:
1) EN 60947-5-1 : 1997 (section 3) for control switches with positive opening operation used as
mechanically actuated position detectors for interlocking guards and for relays used in auxiliary
circuits;
2) EN 60947-4-1 : 1992 for electromechanical contactors and motor-starters used in main circuits;
3) HD 22.1 S3 : 1997 for rubber-insulated cable;
4) HD 21.1 S3 : 1997 for polyvinyl chloride cable if this cable is additionally protected against
mechanical damage by positioning (e.g. inside frames).
b) mechanical components if they comply with 3.5 of EN 292-2 : 1991/A1 : 1995;
c) mechanically actuated position detectors for guards if they are actuated in the positive mode and
their arrangement/fastening and cam design/mounting comply with the requirements of 5.2 and 5.3
of EN 1088 : 1995;
d) hydraulic and pneumatic components and systems if they comply with EN 982 : 1996 and EN 983 :
1996 respectively;
e) electrical principles if they comply with the first four measures listed in 9.4.2.1 of EN 60204-1 :
1992. The circuits shall be either “hardwired”, or if electronic components are used in safety related
control systems they shall be in accordance with 9.4.2.2 (i.e. redundancy with cross-monitoring) or
9.4.2.3 (i.e. diversity) of EN 60204-1 : 1992;
f) interlocking devices with guard locking if they satisfy the requirements of 5.2.7.
Time delay devices used in hardwired safety related control circuits may be of category B in accordance with
EN 954-1 : 1996 if the time delay device is designed for at least one million actuations.
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Verification: By checking relevant drawings and/or circuit diagrams, inspection of the machine; for electrical
components by requiring a confirmation from the component manufacturer that the component complies
with the relevant standards.
5.1.2 Position of controls
Electrical controls for start and stop of the motor(s) for the saw spindle(s), for the feed and for the height
adjustment of the upper roller support shall be situated either as shown in figure 2 or on a moveable control
panel at the loading position. For positioning of emergency stop control see 5.1.5.
Key
1 Front edge of infeed table
2 Fence line
3 Feed
Figure 2 - Position of controls
Verification: By checking the relevant drawings, measurement and inspection of the machine.
5.1.3 Starting
See 9.2.5.2 of EN 60204-l : 1992 and in addition :
For the purposes of this European Standard, „all of the safeguards in place and functional“ is achieved by the
interlocking arrangements described in 5.2.7.1, 5.2.7.2, and 5.2.7.3. „Operation“ means rotation and/or
powered adjustment of any saw spindle and/or workpiece holding device and/or any machine element in
which the sawblade is mounted.
The exceptions described in 9.2.5.2 of EN 60204-1 : 1992 are not relevant.
The start of the feed motor shall be possible only where the saw spindle motors are running at full speed (e.g.
by a time delay) except on machines with the same motor driving both feed and saw spindle.
When a time delay is used, it shall be at least the maximum run-up time and it shall have either a fixed time
delay or the time delay adjustment shall be sealed.
Verification : By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional
testing of the machine.
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5.1.4 Normal stopping
Machines shall be fitted with a stop control which, when actuated, shall disconnect power from all machine
actuators and actuate the brake (if provided).
If the machine is fitted with a mechanical brake, this stop control shall be of category 0 in accordance with
9.2.2 of EN 60204-1 : 1992.
If the machine is fitted with an electrical brake, this stop control shall be of category 1 in accordance with
9.2.2 of EN 60204-1 : 1992.
Where a category 1 stop is fitted, the stopping sequence shall be :
a) cut power to all machine actuators and actuate the brake;
b) cut power to brake after braking sequence is complete.
The stopping sequence shall be satisfied at the level of the control circuits. 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.
If one of the emergency stops meets the requirements of 5.1.2 and this subclause, it can be regarded as
fulfilling the requirements of the normal stop control.
Where separate saw spindle stop controls are provided these shall, when operated, also stop the integrated
feed.
Verification : By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional
testing on the machine.
5.1.5 Emergency stop
See EN 418 : 1992 and in addition :
Emergency stop controls which are in accordance with 9.2.5.4 and 10.7 of EN 60204-1 : 1992 shall be fitted
at the infeed and outfeed ends of the machine and in addition on any moveable control panel.
If the machine is fitted with a mechanical brake, this stop control shall be of category 0 in accordance with
9.2.2 of EN 60204-1 : 1992.
If the machine is fitted with an electrical brake, this stop control shall be of category 1 in accordance with
9.2.2 of EN 60204-
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