EN 1218-3:2001+A1:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheit von Holzbearbeitungsmaschinen - Zapfenschneid- und Schlitzmaschinen - Teil 3: Abbundmaschinen mit von Hand bewegtem SchiebetischSécurité des machines à bois - Tenonneuses - Partie 3: Machines à avance manuelle et à table roulante pour la coupe des éléments de charpente de toit en boisSafety of woodworking machines - Tenoning machines - Part 3: Hand fed tenoning machines with sliding table for cutting structural timbers79.120.10Lesnoobdelovalni strojiWoodworking machinesICS:Ta slovenski standard je istoveten z:EN 1218-3:2001+A1:2009SIST EN 1218-3:2002+A1:2009en,fr01-september-2009SIST EN 1218-3:2002+A1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1218-3:2001+A1
June 2009 ICS 79.120.10 Supersedes EN 1218-3:2001English Version
Safety of woodworking machines - Tenoning machines - Part 3: Hand fed tenoning machines with sliding table for cutting structural timbers
Sécurité des machines à bois - Tenonneuses - Partie 3: Machines à avance manuelle et à table roulante pour la coupe des éléments de charpente de toit en bois
Sicherheit von Holzbearbeitungsmaschinen - Zapfenschneid- und Schlitzmaschinen - Teil 3: Abbundmaschinen mit von Hand bewegtem Schiebetisch This European Standard was approved by CEN on 30 September 2001 and includes Amendment 1 approved by CEN on 21 May 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 worldwide for CEN national Members. Ref. No. EN 1218-3:2001+A1:2009: ESIST EN 1218-3:2002+A1:2009

2 Contents Foreword . 40Introduction . 51Scope . 52Normative references . 53Terms and definitions . 83.1Terms . 83.2Definitions . 84!!!!List of significant hazards"""" . 115Safety requirements and/or measures . 145.1Controls . 145.1.1Safety and reliability of control systems . 145.1.2Position of controls . 155.1.3Starting . 155.1.4Normal stopping . 155.1.5Emergency stop . 165.1.6Failure of the power supply . 165.1.7Failure of the control circuits . 165.2Protection against mechanical hazards . 165.2.1Stability . 165.2.2Risk of break-up during operation . 175.2.3Tool holder and tool design . 175.2.4Braking . 195.2.5Devices to minimise the possibility or the effect of ejection . 205.2.6Workpiece supports and guides . 275.2.7Prevention of access to moving parts . 275.2.8Clamping devices . 295.3Protection against non-mechanical hazards . 295.3.1!!!!Fire"""" . 295.3.2Noise . 295.3.3Emission of chips, dust and gases . 305.3.4Electricity . 305.3.5Ergonomics and handling . 315.3.6Lighting . 315.3.7Pneumatic . 32SIST EN 1218-3:2002+A1:2009

5.3.8Hydraulic . 325.3.9Heat . 325.3.10Substances . 325.3.11Vibration . 325.3.12!!!!Electromagnetic compatibility"""" . 325.3.13Laser . 325.3.14Static electricity . 335.3.15Errors of fitting . 335.3.16Isolation . 335.3.17Maintenance . 336Information for use . 336.1Warning devices . 336.2Marking . 336.3Instruction handbook . 34Annex A (normative)
!!!!Displaceable machines stability test"""" . 38A.1Tilting Test . 38A.2Displacement test . 38Annex B (normative)
Saw spindle dimensional tolerances. 40Annex C (normative)
Riving knife lateral stability test . 41Annex D (normative)
Operating conditions for noise emission measurement . 42D.1General . 42D.2Noise measurements . 42Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC"""" . 49Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 50Bibliography . 51 SIST EN 1218-3:2002+A1:2009

consists of the following parts: Part 1: Single end tenoning machines with sliding table Part 2: Double end tenoning and/or profiling machines fed by chain or chains Part 3: Hand fed tenoning machines with sliding table for cutting structural timbers Part 4: Edge banding machines fed by chain(s) Part 5: One side profiling machines with fixed table and feed rollers or fed by chain" Organisations contributing to the preparation of this European Standard include European Committee of Woodworking Machinery Manufacturers Association "EUMABOIS". !The Annexes A, B, C and D are normative and Annexes E, ZA and ZB are informative." This standard includes a Bibliography. 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 12100-1:2003" 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, 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.SIST EN 1218-3:2002+A1:2009

0 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 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 hand fed tenoning machines with sliding table for cutting structural timbers. This European Standard also includes information to be provided by the manufacturer to the user. Common requirements for tooling are given in !EN 847-1:2005".
1 Scope !This document deals with all the significant hazards, hazardous situations and events as listed in Clause 4 which are relevant to hand fed tenoning machines with sliding table for cutting structural timbers, hereinafter referred to as "machines". " This European Standard does not apply to:  machines where the tenon is produced by means of milling tools;  machines designed for a tool spindle speed exceeding 6000 min-1;  machines where the cuts are made on both ends of the workpiece during one cycle;  combined machines used for tenoning (see !EN 940:2008");  the tenoning attachment on a vertical spindle moulding machine (see !EN 848-1:2007"). !deleted text" For Computer Numerically Controlled (CNC) machines this European Standard does not cover hazards related to Electro-Magnetic Compatibility (EMC). This European Standard is primarily directed to machines which are manufactured after the date of issue of this European Standard. 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 614-1:2006, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles"
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, Degree 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: Contactors and motor starters - Section 1: Electromechanical contactors and motor starters !(IEC 60947-4-1:2000)" !EN 60947-5-1:2004", Low voltage switchgear and control gear — Part 5: Control circuit devices and switching elements — Section 1: Electromechanical control circuit devices !(IEC 60947-5-1:2003)" SIST EN 1218-3:2002+A1:2009

7 !EN 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, acoustic and tactile
signals (IEC 61310-1:2007)" 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 wall test rooms (ISO 3743-1:1994) EN ISO 3743-2:1996, Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, moveable sources in reverberant fields — Part 2: Method 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 methods 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 employing 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 method of emission sound pressure levels at the 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) !EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, 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)" ISO 286-2:1988, ISO system of limits and fits — Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts !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"
Key 1 Main saw blade
2 Horizontal saw blades
3 Vertical saw blades
4 Controls
5 Sliding table guide
6 Sliding table
7 Workpiece clamping bridge NOTE This figure is intended only to illustrate terms. For clarity not all necessary guards are shown Figure 1 — Terminology 3.2 Definitions 3.2.1 hand fed tenoning machine with sliding table for cutting structural timbers machine designed for the production of cuts, for jointing structural timbers, on one end of a workpiece during one cycle. The cuts are made by means of saw blade(s) mounted on one or more spindles (see Figure 1) 3.2.2 cuts for jointing structural timber machined projections including tenons on the end of a workpiece to facilitate the joining of workpieces (see Figure 2) SIST EN 1218-3:2002+A1:2009

9 Figure 2 — Examples of saw cuts for joining structural timber 3.2.3 hand feed manual holding and/or manual guiding of the workpiece (or of a machine element incorporating a tool). Hand feed includes the use of a hand operated carriage on which the workpiece is placed manually or clamped (and the use of a demountable power feed unit) NOTE The words in brackets are not applicable to this machine. 3.2.4 ejection unexpected movement of the workpiece, parts of it or part of the machine from the machine during processing 3.2.5 run-up time time elapsed from the actuation of the start control device until the spindle reaches the intended speed 3.2.6 run-down time time elapsed from the actuation of the stop control device up to spindle standstill SIST EN 1218-3:2002+A1:2009

Key 1 Fixed saw blade
2 Saw blade
3 Workpiece
4 Fixed workpiece
5 Feed direction Figure 3 — Rotational direction of the tool relative to the workpiece feed during cutting against the feed 3.2.9 climb cutting when the relative direction of the tool to the workpiece is as illustrated in Figure 4 SIST EN 1218-3:2002+A1:2009

Key 1 Fixed saw blade
2 Saw blade
3 Workpiece
4 Fixed workpiece
5 Feed direction Figure 4 — Rotational direction of the tool relative to the workpiece feed during climb cutting 3.2.10 machine actuator power mechanism used to effect motion of the machine 3.2.11 !!!!information from the supplier"""" statements, sales literature, leaflets or other, where a manufacturer (supplier) declares either the characteristics of e.g. a material or product or the compliance of the material or product to a relevant standard 4 !!!!List of significant hazards"""" !This clause contains all the 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. SIST EN 1218-3:2002+A1:2009

No Hazards, hazardous situations and hazardous events EN ISO 12100 Relevant sub-clause of this document
Part 1: 2003 Part 2: 2003
1 Mechanical hazards related to: - machine parts or work-pieces:
a) shape; 4.2 4.2.1, 4.2.2, 5 5.2.2, 5.2.3, 5.2.5, 5.2.7, 5.2.8
b) relative location; 5.1.2, 5.1.5, 5.1.6, 5.2.5, 5.2.7, 5.2.8
c) mass and stability (potential energy of elements which may move under the effect of gravity) 5.2.5
e) mechanical strength. 5.2.2
- accumulation of energy inside the machinery:
f) elastic elements (springs), or 4.2 4.10, 5.5.4 5.2.7 g) liquids and gases under pressure; 4.2 4.10, 5.5.4 5.3.7, 5.3.8 1.1 Crushing hazard 4.2.1
5.2.1, 5.2.7, 5.2.8 1.2 Shearing hazard 5.2.7, 5.2.8 1.3 Cutting or severing hazard 5.2.2, 5.2.3, 5.2.4, 5.2.7, 5.2.8 1.4 Entanglement hazard 5.2.3, 5.2.4, 5.2.6, 5.2.7 1.5 Drawing-in or trapping hazard 5.2.7, 5.2.8 1.9 High pressure fluid injection or ejection hazard 5.3.7, 5.3.8 2 Electrical hazards due to: 2.1 Contact of persons with live parts (direct contact) 4.3 4.9, 5.5.4 5.3.4, 5.3.16, 5.3.17 2.2 Contact of persons with parts which have become live under faulty conditions (indirect contact) 4.3 4.9 5.3.4, 5.3.16, 5.3.17 4 Hazards generated by noise, resulting in: 4.1 Hearing loss (deafness), other physiological disorders (loss of balance, loss of awareness) 4.5 4.2.2, 5 5.3.2 4.2 Interference with speech communication, acoustic signals. 5.3.2 6 Hazards generated by radiation 6.5 Lasers 4.7
5.3.13, 6.3 7 Hazards generated by materials and substances (and their constituent elements) processed or used by the machinery 7.1 Hazards from contact with or inhalation of harmful fluids and dusts 4.8 4.3b, 4.4
5.3.3 7.2 Fire hazard 4.8 4.4
5.3.1, 5.3.3, 6.3 SIST EN 1218-3:2002+A1:2009

13 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, 4.11.12, 5.5.5, 5.5.6 5.1.2, 6.3 8.2 Hand-arm or foot-leg anatomy 4.9 4.8.3
5.1.2, 6.3 8.3 Neglected use of personal protection equipment
4.8.7 6.3 8.4 Local lighting
4.8.6 6.3 8.6 Human error, human behaviour
4.8, 4.11.8, 4.11.10, 5.5.2, 6 6.3 8.7 Design, location or identification of manual controls
4.8.7, 4.11.8 5.1.2 8.8 Design or location of visual display units
4.8.8, 6.2 5.1.2 10 Unexpected start up, unexpected overrun/overspeed (or any similar malfunction) from: 10.1 Failure/disorder of the control system
4.11, 5.5.4
5.1.1 10.2 Restoration of energy supply after an interruption
4.11.4
5.1.6, 5.2.5 10.3 External influences on electrical equipment
4.11.11 5.1.1, 5.3.4, 5.3.12 10.6 Errors made by the operator (due to mismatch of machinery with human characteristics and abilities, see 8.6) 4.9 4.8, 4.11.8, 4.11.10, 5.5.2, 6
5.1.1, 5.3.5, 6.3 11 Impossibility of stopping the machine in the best possible conditions
4.11.1, 4.11.3, 5.5.2
5.1.2, 5.1.4, 5.1.5 13 Failure of the power supply
4.11.1, 4.11.4 5.1.6 14 Failure of the control circuit
4.11, 5.5.4
5.1.1 15 Errors of fitting 4.9
4.7, 6.5
5.2.3, 6.3 16 Break-up during operation 4.2.2 4.3 5.2.2 17 Falling or ejected objects or fluids 4.2.2 4.3, 4.10
5.2.2, 5.2.3, 5.2.5, 5.2.6, 5.2.8, 5.3.16 18 Loss of stability / overturning of machinery 4.2.2 5.2.6
5.2.1 """" SIST EN 1218-3:2002+A1:2009

5 Safety requirements and/or measures For guidance in connection with risk reduction by design, see !4.1 of EN ISO 12100-2:2003" and in addition: 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 (see !EN ISO 13849-1:2008") are those for:  starting (see 5.1.3);  normal stopping (see 5.1.4);  emergency stop (see 5.1.5);  the braking system (see 5.2.4);  interlocking (see 5.2.7);  interlocking with guard locking (see 5.2.7);  powered clamping (where provided) (see 5.2.8). 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: a) electrical components if they comply with relevant standards including the following as: 1) !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; 2) !EN 60947-4-1:2001" for electromechanical contactors and motor-starters used in main circuits; 3) !HD 22.1 S4:2002" for rubber-insulated cables; 4) !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 9.4.2.2 (i.e. redundancy with cross-monitoring) or 9.4.2.3 (i.e. diversity) of !EN 60204-1:2006"; 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"; SIST EN 1218-3:2002+A1:2009

15 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 5.2 and 5.3 of EN 1088:1995; e) interlocking devices with guard locking if they satisfy the requirements of 5.2.7.1; f) pneumatic and hydraulic components and systems if they comply with EN 983:1996 and
EN 982:1996 respectively. 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 actuations. Verification: By checking the relevant drawings and/or circuit diagrams and inspection on the machine. !deleted text" !NOTE For components characteristics the information from the component supplier can be useful." 5.1.2 Position of controls The main control devices of the machine for starting the saw spindles and normal stopping shall be located at the loading position at a height between 600 mm and 1 700 mm from the floor level. For the position of emergency stop controls see 5.1.5. The controls for each saw blade drive motor shall include an indication, e.g. by a light signal or a two position switch when power is supplied to that motor. Verification: By checking the relevant drawings and/or circuit diagrams, inspection, measurement and relevant functional testing on the machine. 5.1.3 Starting See 9.2.5.2 of !EN 60204-1:2006" and in addition: For the purposes of this European Standard "all safeguards are in place and functional" is achieved by the interlocking arrangements described in 5.2.7 and "operational" means rotation of any saw blade spindle. It shall be possible to start each saw blade drive motor separately. Verification: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing on the machine. 5.1.4 Normal stopping A stop control shall be fitted which, when actuated, stops all machine actuators and cuts power to them once stopping is complete. The category of the stop function (category 0 or 1) shall be in accordance with the requirements of 9.2.2 of !EN 60204-1:2006", where the "safety and/or functional“ requirements of the machine are fulfilled by maintaining power to the electrical brake (if provided) and/or powered clamping (if provided) until stopping is complete. These requirements 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 the emergency stop provided by virtue of 5.1.5 also achieves at least the above requirements, then the emergency stop can be regarded as fulfilling the requirements of the normal stop control. SIST EN 1218-3:2002+A1:2009

On machines with pneumatic clamping of the workpiece, provision shall be made to maintain clamping pressure in the event of a pneumatic power failure. Where non-return valves are used to meet this requirement, they shall be fitted to the actuating cylinders.
Verification: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing on the machine. 5.1.7 Failure of the control circuits See 5.1.1. 5.2 Protection against mechanical hazards 5.2.1 Stability Machines shall be provided with the facility e.g. holes, for fixing them to the floor or other stable structure (also see 6.3). !Displaceable" machines shall meet the requirements of annex A. !Displaceable" machines fitted with wheels shall have the facility to make them stable during cutting e.g. brakes for the wheels or a device to retract the wheels from the floor.
NOTE The requirements for a stability test for !displaceable" machines with wheels, both when moved from location to location and when in use, will be considered at the first revision of this standard. Verification: By checking the relevant drawings, inspection and relevant functional testing on the machine. SIST EN 1218-3:2002+A1:2009

17 5.2.2 Risk of break-up during operation The saw blade guards required by 5.2.7.1 shall be manufactured from materials with at least the following properties: a) steel with an ultimate breaking strength of at least 350 N mm-2 and a wall thickness of at least 2 mm; b) light alloy with the characteristics shown in Table 2; Table 2 — Light alloy saw blade guard thickness and tensile strength Minimum ultimate tensile strength N mm-2 Minimum thickness mm 180
300 3
c) polycarbonate with a wall thickness of at least !5 mm" or other plastic material with such a wall thickness that the impact strength is equal to or better than that of polycarbonate of !5 mm"
thickness; d) cast iron with an ultimate tensile strength of at least 200 N mm-2 and a wall thickness of at least 5 mm. Verification: By checking the relevant drawings, measurement !and" inspection of the machine. !deleted text" !NOTE
For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful." 5.2.3 Tool holder and tool design See 6.3, !EN 847-1:2005" and in addition: 5.2.3.1 Geometrical performance The saw blade spindle shall be manufactured to at least the requirements given in annex B. The part of the spindle upon which the saw blades are located shall have a minimum tolerance of g6 in accordance with the requirements of ISO 286-2:1988. Verification: By checking the relevant drawings and by measurement. 5.2.3.2 Strength The tool spindle shall be manufactured in steel with an ultimate tensile strength of at least 580 N mm-2. Verification: By checking the relevant drawings. !deleted text" !NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful." 5.2.3.3 Spindle unit locking Spindle units that are capable of being adjusted, shall be held in the adjusted position during machining. Verification: By checking the relevant drawings, inspection and relevant functional testing on the machine. SIST EN 1218-3:2002+A1:2009

19 Precautions shall be taken to ensure that the saw blade does not come loose during start up, running, run-down or braking e.g. by using a positive connection between the spindle and the saw blade or by using a positive connection between the front saw flange and the saw spindle. Verification: By checking the relevant drawings, measurement, inspection and relevant functional testing on the machine. 5.2.4 Braking 5.2.4.1 General An automatic brake shall be provided for tool spindles where the unbraked run down time is more than 10 s. The braked run-down time shall be less than 10 s, or where the run-up time exceeds 10 s the braked run-down time shall be less than the run-up time but in no case exceed 30 s. For electrical braking, reverse current injection braking shall not be used. Verification: For the determination of braked run-down time, unbraked run-down time and run-up time, see the appropriate test below. 5.2.4.2 Conditions for all tests a) the spindle unit shall be set in accordance with the manufacturer’s instructions (e.g. belt tension); b) when selecting the speed and the saw blade, conditions shall be chosen which create the greatest kinetic energy for which the machine is designed; c) warm up the spindle unit for at least 15 min by running the machine under no load before beginning the test; d) verify that the actual spindle speed is within 10 % of the intended speed; e) when testing a unit provided with manual star delta starting, the manufacturer’s instructions for starting shall be observed; f) the speed measuring equipment shall have an accuracy of at least ± 1 % of full scale; g) the time measuring equipment shall have an accuracy of at least ± 0,1 s. 5.2.4.3 Tests 5.2.4.3.1 Unbraked run-down time The unbraked run-down time shall be measured as follows: a) start the spindle drive motor and run at the intended speed (no load) for 1 min; b) cut power to the spindle drive motor and measure the unbraked run-down time; c) repeat steps a) and b) twice more. The unbraked run-down time of the saw blade spindle is the average of the three measurements taken. 5.2.4.3.2 Braked run-down time The braked run-down time shall be measured as follows: SIST EN 1218-3:2002+A1:2009

(5.7P)2 min (where P is the motor power (rated input) in kW). The re-start interval shall not be less than 1 min; d) repeat steps b) to d) twice. The braked run-down time of the saw blade spindle is the average of the three measurements taken. 5.2.4.3.3 Run-up time The run-up time shall be measured as follows: a) cut power to the saw blade spindle drive motor and allow the spindle to come to a complete stop; b) re-start the saw blade spindle drive motor and measure the run-up time; c) repeat steps a) and b) twice more. The run-up time of the saw blade spindle is the average of the three measurements taken. 5.2.5 Devices to minimise the possibility or the effect of ejection To avoid the ejection of off-cuts, a means, e.g. a deflector, shall be provided to move the off-cuts away from the saw blade to prevent them from contacting other saw blades on the machine.
Machines shall be designed so that climb cutting is not possible with the main saw blade and the horizontal saw blades. Where climb cutting is provided to the vertical saw blades (see 3 in Figure 1) the guarding provided at the outfeed end of the machine in accordance with the requirements of 5.2.7 shall be capable of containing any ejected off-cut. Riving knives shall be provided for the vertical saw blades. The riving knife of the upper
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