EN 12750:2013

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Varnost lesnoobdelovalnih strojev - Rezkalni stroji za štiristransko obdelavoSicherheit von Holzbearbeitungsmaschinen - Fräsmaschinen für vierseitige BearbeitungSécurité des machines pour le travail du bois - Machines à moulurer sur quatre facesSafety of woodworking machines - Four sided moulding machines79.120.10Lesnoobdelovalni strojiWoodworking machinesICS:Ta slovenski standard je istoveten z:EN 12750:2013SIST EN 12750:2013en,fr,de01-april-2013SIST EN 12750:2013SLOVENSKI
STANDARDSIST EN 12750:2002+A1:20091DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12750
February 2013 ICS 79.120.10 Supersedes EN 12750:2001+A1:2009English Version
Safety of woodworking machines - Four sided moulding machines
Sécurité des machines pour le travail du bois - Machines à moulurer sur quatre faces
Sicherheit von Holzbearbeitungsmaschinen - Fräsmaschinen für vierseitige Bearbeitung This European Standard was approved by CEN on 15 December 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12750:2013: ESIST EN 12750:2013

Spindles dimensional tolerances . 58 Annex B (normative)
Braking tests . 59 B.1 Conditions for all tests . 59 B.2 Un-braked run-down time . 59 B.3 Braked run-down time . 59 B.4 Run-up time . 60 Annex C (normative)
Table lip resistance test . 61 C.1 General . 61 C.2 Test probe . 61 C.3 Measurements . 63 C.4 Tests . 63 C.5 Result . 64 C.6 Test report . 64 Annex D (normative)
Impact test method for guards . 65 D.1 General . 65 D.2 Test method . 65 D.2.1 Preliminary remarks . 65 D.2.2 Testing equipment. 65 D.2.3 Projectile for guards . 65 D.2.4 Sampling . 66 D.2.5 Test procedure . 66 D.3 Results . 66 D.4 Assessment . 66 D.5 Test report . 67 D.6 Test equipment for impact test . 67 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 68 Bibliography . 69
NOTE For mechanical in-feed devices which also prevent access to the in-feed opening, see 5.3.7.2. b) the combination of single machines with any other machine as part of a line; c) out-feed devices (e.g. mechanical handling systems) except for hazards related to ejection from the machine due to climb cutting. This European Standard is not applicable to four sided moulding machines 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 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 SIST EN 12750:2013

EN 50178:1997, Electronic equipment for use in power installations EN 50370-1:2005, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part 1: Emission EN 50370-2:2003, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part 2: Immunity EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified) EN 60439-1:19991), Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially type-tested assemblies (IEC 60439-1:1999) EN 60529:19912), Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989) EN 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:2007) EN 61496-1:2004, Safety of machinery — Electro-sensitive protective equipment — Part 1: General requirements and tests (IEC 61496-1:2004, modified) EN 61800-5-2:2007, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements — Functional (IEC 61800-5-2:2007) EN ISO 286-2:2010, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
(ISO 286-2:2010)
1) This document is impacted by the amendment EN 60439-1:1999/A1:2004. 2) This document is impacted by the amendment EN 60529:1991/A1:2000. SIST EN 12750:2013

EN ISO 13732-1:2008, Ergonomics of the thermal environment — Methods for the assessment of human responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006)
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 13850:2008, Safety of machinery — Emergency stop — Principles for design (ISO 13850:2006) EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008) SIST EN 12750:2013

Key 1 glass bead saw-blade 2 bed ledge separator 3 anti-kickback finger 4 pressure device 5 guiding channel for glass bead ledge 6 glass bead ledge 7 work-piece 8 fence 9 feed direction Figure 1 — Example of a glass bead cutting unit 3.4 hydraulic tool fixing device device for clamping the tool to the spindle using hydraulic pressure 3.5 integrated feed on four sided moulding machines feed mechanism for the work-piece or tool which is integrated with the machine and where the work-piece or machine element with incorporated tool are held and controlled mechanically during the machining operation 3.6 loading of four sided moulding machines manual or automatic placing of the work-piece on to a carriage, magazine, lift, hopper, movable bed, conveyor or the presentation of the work-piece to an integrated feed device 3.7 climb cutting cutting where the projection of the movement of the cutting knife in direction of the feed movement shows in the same direction as the relative movement of the work-piece against the tool Note 1 to entry: See also Figure 2. SIST EN 12750:2013

Key 1 tool, fixed axis 2 tool, moving axis 3 feed direction (work piece) 4 work piece (moving) 5 feed direction (tool) 6 work piece (fixed) Figure 2 — Climb cutting 3.8 cutting area of the tool area where the tool can be involved in the cutting process 3.9 non-cutting area of the tool area of the tool not involved in the cutting process 3.10 ejection uncontrolled movement of the work-piece or parts of it or part of the tool from the machine during processing 3.11 kickback unexpected sudden movement of the work-piece or parts of it opposite to the direction of feed during processing 3.12 anti-kickback device device which either reduces the possibility of kickback or arrests the motion of the work-piece or parts of it during kickback Note 1 to entry: For example see Key 3 in Figure 1. 3.13 catching fingers device device designed to prevent the ejection of divided work-pieces Note 1 to entry: See also Figure 3. SIST EN 12750:2013

Key 1 catching finger 2 work-piece 3 feed direction Figure 3 — Example of a catching fingers device 3.14 speed range range between the lowest and the highest rotational speed for which the spindle or tool is designed to operate 3.15 run-up time time elapsed from the actuation of the start control device until the spindle reaches the intended speed 3.16 run-down time time elapsed from the actuation of the stop control device up to spindle standstill 3.17 pressure sensitive protective equipment
PSPE mechanically actuated assembly of devices and/or components working together for protective tripping or presence-sensing purposes comprising as a minimum:  one or more pressure sensing elements;  a control unit (where necessary);  one or more output signal switching device(s) Note 1 to entry: Safety-related control system associated with the PSPE or the PSPE itself can further include a secondary switching device, start interlock, re-start interlock, etc. EXAMPLE Pressure sensitive bars. SIST EN 12750:2013

[EN ISO 12100:2010, 3.30] 3.24 safety-related part of a control system
SRP/CS part of a control system that responds to safety-related input signals and generates safety-related output signals
[EN ISO 13849-1:2008, 3.1.1] 3.25 safety-related PLC programmable logic controller dedicated to safety-related application designed in the required PL according to EN ISO 13849-1:2008 3.26 safety-related electrical control system
SRECS electrical part of a control system whose failure can result in a immediate increase of the risk(s)
[EN 62061:2005, 3.2.4] 3.27 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 SIST EN 12750:2013

[EN ISO 13849-1:2008, 3.1.21] 3.29 safety-related application software
SRASW software specific to the application, that is implemented by the machine manufacturer, generally containing logic sequences, limits and expressions that control the appropriate inputs, outputs, calculations and decisions necessary to meet SRP/CS requirements
[EN ISO 13849-1:2008, 3.1.36] 3.30 safety-related embedded software
SRESW firmware system software software that is part of the system supplied by the control manufacturer and is not accessible for modification by the user of the machine
[EN ISO 13849-1:2008, 3.1.37] Note 1 to entry: Embedded software is usually written in FVL. EXAMPLE The operating system of a speed monitoring device. 3.31 diagnostic coverage
DC measure of the effectiveness of diagnostics, which may be determined as the ratio between the failure rate of detected dangerous failures and the failure rate of total dangerous failures [EN ISO 13849-1:2008, 3.1.26] Note 1 to entry: Diagnostic coverage can exist for the whole or parts of a safety-related system. For example, diagnostic coverage could exist for sensors and/or logic system and/or final elements. 3.32 information from the supplier statements, sales literature, leaflets or other documents where a manufacturer (supplier) declares either the characteristics of e.g. a material or product or the conformity of a material or a product to a relevant standard 4 List of significant hazards This clause contains all the 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. 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.
Relevant clause(s) of this document 1 Mechanical hazards due to machine parts or work-pieces due to
a) shape; 6.2.2.1, 6.2.2.2, 6.3 5.3.3, 5.3.5, 5.3.6, 5.3.7, 5.3.8, Annex C
b) relative location; 5.2.2, 5.2.3, 5.2.9, 5.3.3, 5.3.5
c) mass and stability (potential energy of elements which may move under the effect of gravity); 5.2.9, 5.3.1, 5.3.6, 5.3.9
d) mass and velocity (kinetic energy of elements in controlled or uncontrolled motion); 5.2.6, 5.2.7, 5.2.9
e) mechanical strength. 5.3.3, 5.3.5, 5.3.6, 5.3.8, Annex C, Annex D
- accumulation of energy inside the machinery by:
f) liquids and gases under pressure; 6.2.10, 6.3.5.4 5.4.7, 5.4.8 1.1 Crushing hazard
5.3.7.1, 5.3.7.2 1.2 Shearing hazard 5.3.7.1, 5.3.7.2 1.3 Cutting or severing hazard 5.3.7.1, 5.3.7.2 1.4 Entanglement hazard 5.3.7.1, 5.3.7.2, 5.3.7.3 1.5 Drawing-in or trapping hazard 5.3.7.1, 5.3.7.2, 5.3.7.3 1.6 Impact hazard 5.3.5 1.7 Stabbing or puncture hazard 5.3.7, 6.3 1.9 High pressure fluid injection or ejection hazard 6.2.10 5.4.9 2 Electrical hazards due to: 2.1 Contact of persons with live parts (direct contact) 6.2.9, 6.3.5.4 5.4.4 2.2 Contact of persons with parts which have become live under faulty conditions (indirect contact) 6.2.9 5.4.4 3 Thermal hazards, resulting in:
3.1 Burns and scalds, by a possible contact of persons, by flames or explosions and also by the radiation of heat sources 6.2.8 c) 6.2, 6.3 4 Hazards generated by noise, resulting in: 4.1 Hearing loss (deafness), other physiological disorders (loss of balance, loss or awareness) 6.2.2.2, 6.3 5.4.2 4.2 Interference with speech communication, acoustic signals 5.4.2 SIST EN 12750:2013

Table 1 — List of significant hazards (2 of 2) No Hazards, hazardous situations and hazardous events EN ISO 12100:2010 Relevant clause(s) of this document 7 Hazards generated by materials and substances (and their constituent elements) processed or used by the machinery 7.1 Hazards from contact with or inhalation of harmful fluids and dusts 6.2.3, 6.2.4 5.4.3 7.2 Fire 6.2.4 5.4.1, 5.4.10 8 Hazards generated by neglecting ergonomic principles in machinery design related to 8.1 Unhealthy postures or excessive effort 6.2.7, 6.2.8, 6.2.11.12, 6.3.5.5, 6.3.5.6 5.2.2, 5.2.6 8.2 Hand-arm or foot-leg anatomy 6.2.8 5.4.5 8.4 Local lighting 6.2.8 6.3 8.6 Human error, human behaviour 6.2.8, 6.2.11.8, 6.2.11.10, 6.3.5.2, 6.4 5.2.6, 6.3 8.7 Design, location or identification of manual controls 6.2.8 f), 6.2.11.8 5.2.2, 5.2.6 8.8 Design or location of visual display units 6.2.8, 6.4.2 5.2.2 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 5.2.12 10.2 Restoration of energy supply after an interruption 6.2.11.4 5.2.12 10.3 External influences on electrical equipment 6.2.11.11 5.4.9 10.6 Errors made by the operator (due to mismatch of machinery with human characteristics and abilities, see 8.6) 6.2.8, 6.2.11.8, 6.2.11.10, 6.3.5.2, 6.4 5.4.5, 5.4.11, 6.3 11 Impossibility of stopping the machine in the best possible conditions 6.2.11.1, 6.2.11.3, 6.3.5.2 5.2.4, 5.2.5 12 Variations in the rotational speed of tools 6.2.2.2, 6.2.3 5.2.7 13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.12 14 Failure of the control circuit 6.2.11, 6.3.5.4
5.2.12 15 Errors of fitting 6.2.7, 6.4.5 5.4.12 16 Break-up during operation 6.2.3 5.3.2 17 Falling or ejected objects or fluids 6.2.3, 6.2.10 5.3.5 18 Loss of stability / overturning of machinery 6.3.2.6 5.3.1
5 Safety requirements and/or measures 5.1 General The machine shall comply with the safety requirements and/or protective measures of Clause 5.
In addition, the machine should be designed according to the principles of EN ISO 12100:2010 for hazards relevant but not significant, which are not dealt with by this document (e.g. sharp edges of the machine frame). SIST EN 12750:2013

NOTE If monitoring systems are used for diagnostics, they are also considered as SRP/CS. 5.2.1.2 Performance level (PL) For the safety-related parts of the control system (SRP/CS) with the functions listed in column 1 of Table 2 the minimum performance level (see EN ISO 13849-1:2008, 4.5) shall be in accordance with column 2 of Table 2.
NOTE The average probability of a dangerous failure per hour for the different performance levels is described in EN ISO 13849-1:2008, Table 3. If on machines designed for different modes of operation the same SRP/CS is used for all safety functions in the different modes the SRP/CS shall meet the requirements of the highest PL of the different modes. Where a combination of SRP/CS is used the overall PL identified according 6.3 of EN ISO 13849-1:2008 shall comply at least with the PL required in Table 2. SRP/CS for which a special standard exists shall fulfil all requirements of this document. Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine. SIST EN 12750:2013

Unless safety-related electronic parts of the control system (SRP/CS) are part of a component for which a special standard exists they shall fulfil the environmental requirements according to EN 50178:1997, 6.1 and 6.2. Unless SRP/CS dedicated to realise performance level b or c are part of a component for which a special standard exists, they shall fulfil the EMC requirements for type 2 in accordance with the requirements of EN 61496-1:2004.
See also 5.4.9 for the EMC requirements on the complete machine. Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine, measurement and relevant functional testing on the machine. NOTE For the components characteristics a confirmation from the components' manufacturers can be useful.
5.2.1.5 Protective devices Protective devices shall be in accordance with the specific standards. In particular the requirements of the following relevant standards shall be applied: a) magnetic/proximity switches shall be in accordance with the requirements of EN 1088:1995+A2:2008, 6.3 and the related control system shall be at least PL = c in accordance with the requirement
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