SIST EN 12717:2002+A1:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Varnost obdelovalnih strojev - Vrtalni strojiSicherheit von Werkzeugmaschinen - BohrmaschinenSécurité des machines-outils - PerceusesSafety of machine tools - Drilling machines25.080.40VrtalnikiDrilling machinesICS:Ta slovenski standard je istoveten z:EN 12717:2001+A1:2009SIST EN 12717:2002+A1:2009en,fr01-maj-2009SIST EN 12717:2002+A1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12717:2001+A1
February 2009 ICS 25.080.40 Supersedes EN 12717:2001English Version
Safety of machine tools - Drilling machines
Sécurité des machines-outils - Perceuses
Sicherheit von Werkzeugmaschinen - Bohrmaschinen This European Standard was approved by CEN on 7 March 2001 and includes Amendment 1 approved by CEN on 29 December 2008.
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: rue de Stassart, 36
B-1050 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12717:2001+A1:2009: ESIST EN 12717:2002+A1:2009

Illustrative figures used as examples . 30 Annex B !(normative)"
Noise emission measurement . 37 Annex ZA (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 97/37/EC, amended by Directive 98/79/EC" . 39 Annex ZB (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC" . 40 Bibliography . 41
Where this is not practicable (e.g. due to size of the workpiece, its geometry, or its special characteristics), operators may be safeguarded by other means (e.g. perimeter fencing, protective devices at the operating position).
Operators may also benefit from pendant controls, which enable them to move about the machine. The significant hazards covered by this standard are those listed in clause 4. The safety requirements and/or protective measures to prevent or minimize those hazards identified in table 1 and procedures for verification of these requirements or measures are found in clause 5. The figures in annex A are examples only and are not intended to illustrate the only interpretation of the text. 1 Scope 1.1 This standard specifies the technical safety requirements and measures to be adopted by persons undertaking the design, construction and supply (including installation and dismantling, with arrangements for transport and maintenance) of stationary drilling machines (see 3.1). This standard covers both manual and automatic drilling machines. These include but are not limited to:  pedestal drilling machines (see figure A.1);  radial arm drilling machines (see figure A.2);  coordinate table drilling machines (see figure A.3);  horizontal spindle drilling machines (see figure A.4);  multi–spindle drilling machines (see figure A.5)  turret type drilling machines with manual control of turret index. SIST EN 12717:2002+A1:2009

It presumes access to the machine from all directions.
It describes means to reduce risks to operators and other exposed persons. 1.3 This standard also applies to workpiece transfer devices when they form an integral part of the machine. 1.4 This standard deals with significant hazards relevant to drilling machines when they are used as intended and under the conditions foreseen by the manufacturer (see clause 4). 1.5 Hazards arising from other metal working processes (e.g. milling, grinding, turning, forming, EDM, laser processing) are covered by other standards (see Bibliography). 1.6 Automatic drilling machines with automatic tool changing capabilities are not covered by this standard (see prEN 12417:1996). 1.7 This standard is not applicable to drilling machines, which were manufactured before the date of publication by CEN of this 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 and EN 292-2/A1:1995, 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: Technical principles and specifications EN 294:1992, Safety of machinery – Safety distances to prevent danger zones being reached by the upper limbs EN 349, Safety of machinery – Minimum gaps to avoid crushing of parts of the human body EN 457, Safety of machinery - Auditory danger signals - General requirements, design and testing (ISO 7731:1986 modified) EN 574, Safety of machinery - Two hand control devices – Functional aspects – Principles for design EN 614, Safety of machinery - Ergonomic design principles – Part 1: Terminology and general principles Part 2: Interaction between machinery design and work tasks EN 626, Safety of machinery – Reduction of risks to health from hazardous substances emitted by machinery EN 894:1997, Safety of machinery –Ergonomics requirements and data for the design of displays and control actuators – Part 1: Human interactions Part 2: Displays EN 894:2000, Part 3: Control actuators EN 953:1997, Safety of machinery – Guards – General requirements for the design and construction of fixed and movable guards SIST EN 12717:2002+A1:2009

Part 1: Terms and definitions Part 2: Manual handling of heavy weights associated with machinery Part 3: Recommended force limits for machinery operation EN 1037:1995, Safety of machinery – Prevention of unexpected start-up EN 1050:1996, Safety of machinery - Principles for risk assessment EN 1088:1995, Safety of machinery - Interlocking devices associated with guards – Principles for design and selection EN 1127–1:1997, Explosive atmospheres - Explosion prevention and protection – Part 1: Basic concepts and methodology EN 1760–1:1997, Safety of machinery - Pressure sensitive protective devices – Part 1: General principles for the design and testing of pressure sensitive mats and pressure sensitive floors EN 1837, Safety of machinery – Integral lighting of machines EN ISO 3744:1995, Acoustics – Determination of sound power level of noise sources using sound pressure – Engineering method in an essentially free field over a reflecting plane EN ISO 3746:1995, Acoustics – Determination of sound power level of noise sources using sound pressure – Survey method using an enveloping measurement surface over a reflecting plane EN ISO 4871, Acoustics – Declaration and verification of noise emission values of machinery and equipment EN ISO 9614-1:1995, Acoustics – Determination of sound power level of noise sources using sound intensity – Part 1: Measurement at discrete points EN ISO 11202:1995, Acoustics – Noise emitted by machinery and equipment – Measurement method of emission sound power levels at the work station and at other specified positions – Survey method in situ EN ISO 11204:1995, Acoustics - Noise emitted by machinery and equipment – Method requiring environmental corrections EN ISO 14122, Permanent means of access to machines and industrial plants Part 2: Working platforms and gangways Part 3: Stairways, stepladders and guard-rails prEN 13478:1999, Safety of machinery - Fire prevention and protection EN ISO 11688-1, Acoustics – Recommended practice for the design of low–noise machinery and equipment - Part 1: Planning ISO/TR 11688-2:1998, Acoustics – Recommended practice for the design of low–noise machinery and equipment - Part 2: Introduction to the physics of low-noise design SIST EN 12717:2002+A1:2009

Description Example(s) of related hazardous situation(s)Associated activityRelated danger zoneClause 5 Reference
1 Mechanical hazards
1.1 Crushing
moving axes, tool clamping setting, manual tool exchange, maintenance between fixed and moving elements of the machine Tables 2, 3 and 4 (1.1.1–1.4.3)1.2 Shearing moving axes manual operation between tool/ spindle and table/ workpiece
1.3 Cutting or severing tool running
drilling with hand held workpiece work zone
1.4 Entanglement rotating spindle or tool workpiece load/ unload, positional adjustment, manual swarf/chip removal, cutting fluid application at spindle or tool
other rotating parts (e.g. conveyors, transmission elements) setting, cleaning, maintenance swarf/chip collection and discharge zones, transmission elements
1.5 Drawing–in or trapping rapid travel of table or spindle head power–operated motion of workpiece on table or tool in spindle envelope of movement of workpiece on table axes; envelope of movement of tool in spindle head Tables 2, 3 and 4 (1.1.1–1.4.3)
rotating power transmission mechanisms
maintenance in or around machine
1.6 Impact unintended movement
(rotation) of workpiece during drilling with inadequate workpiece clamping work zone
rapid movement of workpiece or spindle head,
during
powered traverse at machine
automatic workpiece transfer
power-operated workpiece transfer envelope of motion of workpiece and workpiece transfer mechanisms
1.7 Stabbing or puncture handling tools during manual tool change at sharp cutter faces (see clause 7)
handling swarf/chips during loading/ unloading and cleaning at workpiece, table, and swarf /chip collecting and discharge zones (see clause 7) 2 Electrical hazards
2.1 Contact of persons with live parts (direct contact) contact with live parts or connections during commissioning, maintenance, trouble shooting electrical cabinet, terminal boxes, control panels at machine 2.1 2.2 Contact of persons with parts which have become live under faulty conditions (indirect contact) contact with live parts or connections during operation, inspection and maintenance of machine at machine or faulty part 2.2
Description Example(s) of related hazardous situation(s) Associated activityRelated danger zone Clause 5 Reference
4 Hazards generated by noise
4.1 Hearing loss (deafness), other physiological disorders (e.g. loss of balance, loss of awareness) motion of power transmission elements, cutting processes and fluid power systems during operating cycle of machine near machine 4.1 4.2 Interference with speech communication, acoustical signals
air blast used for cleaning of tool or workpiece locations
during operating cycle of machine near machine 4.2 7 Hazards generated by materials and substances
7.1 Hazards from contact with or inhalation of harmful fluids, gases, mists, fumes, and dusts conditions near machine caused by ejection of particles of work material, fluid droplets or mist from metal working fluids
during operating cycle of the machine at or near machine 7.1 7.2 Fire or explosion flammable work material, flammable (low flash point) metal working fluids during operating cycle of the machine at or near machine 7.2 7.3 Biological or micro–biological (viral or bacterial) hazards contact with hydraulic or metal working fluid as liquid or mist containing detritus and bacteria during operation, process control, and maintenance at or near machine 7.3 8 Hazards generated by neglecting ergonomic principles in the design process8.1 Unhealthy postures or excessive effort (repetitive strain)
lifting and reaching while handling workpiece, tools, and machine parts during loading/ unloading, process control, and maintenance at load/unload and tool mounting positions, maintenance action points 8.1 8.2 Inadequate consideration of hand-arm or foot-leg anatomy inappropriate location of controls during loading/ unloading, process control, and maintenance at load/unload and tool mounting positions, maintenance action points 8.2 8.4 Inadequate local lighting judgment and accuracy of manual actions impaired during handling/ positioning of work materials and cutters during loading /unloading, process control, tool handling at load/unload, tool mounting positions 8.4 8.6 Human errors, human behaviour reasonably foreseeable misuse, inadvertent operation of controls, incorrect work material and cutter handling and setting during loading/ unloading, process control, tool handling at load/unload, tool mounting positions 8.6 8.7 Inadequate design, location or identification of manual controls inadvertent
operation of controls during setting, operating cycle
at or near machine 8.7 8.8 Inadequate design or location of visual display units misinterpretation of displayed information during setting, operating cycle
at or near machine 8.8
10 Unexpected start-up, unexpected overrun/ overspeed 10.1 Failure/disorder of the control system mechanical hazards associated with selected machine movement during setting, cleaning
at machine 10.1 10.2 Restoration of energy supply after an interruption unexpected movements of machine during setting, cleaning or maintenance at or near machine 10.2 10.3 External influences on the electrical equipment unpredictable behaviour of electronic controls due to electromagnetic interference during setting or operating cycle of the machine at or near machine 10.3 13 Failure of the power supply malfunctions of the control with consequent
misapplication of stored energy or power.
Power workholding fails, motor overspeed.
Part breakage causes machine elements to move under residual forces (inertia, gravity, spring/ energy storage means) causing external elements to move unexpectedly during operation, process control, maintenance at machine – machine elements retained in a safe condition by the application of power or fluid pressure. 13 14 Failure of the control circuit Unexpected movement of machine During setting, cleaning or maintenance At or near machine 14 15 Errors of fitting machine elements fail or swing unexpectedly
15 17 Falling or ejected objects or fluids ejection of machine parts, workpiece or tools caused by clamping device, control system failures or collision due to data errors during machine operation at or near machine 17 18 Loss of stability, overturning of machinery unrestrained machine or machine part (maintained in position by gravity), falls or overturns during loading/ unloading and process control, at heavy/unwielding workpieces during maintenance (disassembly/ relocation) at machine
18 19 Slip , trip, and fall of persons ejection or spillage of metal working fluids and lubricants (also hydraulic fluid if used); work at heights during workpiece load/unload, setting, process control and maintenance work at heights work to replenish fluids (e.g. lubricants)machine table, floor area around machine and workpiece permanent means of access to the machine 19 * This list is derived from annex A of EN 1050:1996.
1.1 Work zones
Access to mechanical hazards arising from rotating spindle/tools of manual drilling machines shall be prevented by fixed or adjustable guards or interlocked movable guards (Interlocking devices shall be in accordance with EN 1088:1995).
Where guards are not practicable, these may be substituted by protective devices.
visual inspection
1.1.1 Guards
Guard(s) shall enclose the spindle nose, chuck/toolholder, and cutting tool to prevent access from at least the front and both sides when the spindle/quill is at its normal rest position (see figure A.6).
visual inspection
1.1.2 Protective devices For some machine types (e.g. radial arm drilling machine) where reasonably foreseeable applications can preclude the use of guards, protective devices shall be provided (e.g. telescopic trip device associated with a braking system).
Such protective devices shall be located no more than 150 mm from the outside diameter of each spindle of the machine and in the first quadrant of spindle rotation from the operator’s normal position (see figure A.7).
by visual inspection, practical test
1.1.3 Spindle braking
Stopping performance of spindle braking systems associated with a trip device shall have a minimum capability as follows:
spindle RPM (n) max. revolutions to stop
n ≤ 250 1 250 < n ≤ 1000 2 1000
< n ≤ 1500 3
n
>
1500 4
measurement
1.2 Workpiece holding
For all manual drilling machines, the manufacturer shall incorporate facilities to securely affix the workpiece to the work table (e.g. through holes, T slots, mounting holes – see figure A.8).
visual inspection
NOTE Crushing hazards are not normally considered significant for manual drilling machines.
Safety requirement and/or protective measureVerification1 Mechanical
1.1 Work zone
1.1.1 Primary safeguards The work zones of automatic drilling machines shall be safeguarded. The guarding arrangements shall be designed to prevent access to hazardous situations.
NOTE
General guidance for the design selection of safeguards, where the hazards from moving parts cannot be avoided by design is given in 4.1, 4.2 and table 1 of EN 292-2:1991. For the purposes of this clause,
1) all protective equipment shall be in accordance with the following:in accordance with EN 61496-1:1997 (ESPE), in accordance with IEC 61496-2:1997, category 4 (AOPD), in accordance with EN 61496-1:1997 (PSPD). 2) Guards shall be in accordance with EN 953:1997,
Visual inspection
1.1.2 Guarding strategies
1.1.2.1 General
The work zone shall be enclosed where possible by fixed and/or interlocked movable guards during machining operations. Where enclosure is not reasonably practicable (e.g. due to the size of the workpiece, its geometry, other special characteristics of the machine or its application), operators and other exposed persons shall be safeguarded by a combination of other means (e.g. protected operator position (cabin), perimeter guarding, other protective devices).
Visual inspection, assessment
1.1.2.2 Enclosure
Where reasonably practicable, work zone guarding shall be fixed to the structure of the machine (see 3.2.1 of EN 953:1997) (see also guard characteristics below and figures A.3, A.4).
Visual inspection, examination of drawings
1.1.2.3 Alternatives to enclosures Access to the work zone, by the operator, from the normal (fixed) operating position shall be prevented by local guarding (typically forming a cabin). Access to the cabin shall not require entry into the hazard zone enclosed by perimeter fencing or other protective devices. Where this is not possible because of the machine configuration or other operating constraints, the access route to the operating position shall not require approach to hazardous situations.
Visual inspection
Where the machine operator requires access to the work zone from the protected (fixed) operating position (cabin) e.g. for setting purposes or process control, the cabin shall be designed so that access is via an interlocked movable guard from within the cabin. Alternatively the movement of a pendant control from the cabin position shall have the same effect as the interlocked guard above. Operation of the machine in mode 1 (automatic cycle) shall only be possible when the pendant control (above) is relocated in the cabin. Any other powered movement of machine elements shall only be achieved by selection of the appropriate operating mode (see operating modes below). Visual inspection
Safety requirement and/or protective measure Verification1 Mechanical (continued) Access to the work zone by persons other than the machine operator shall be prevented by perimeter fencing and/or other means (e.g. electrosensitive protective equipment (ESPE), active-opto electronic protective devices (AOPDs), pressure sensitive protective devices (PSPDs). Where access points (e.g. gates), are provided they shall be interlocked. Where interlocking is not possible because of the particular machine configuration and application, any non interlocked access points shall be within the visual held of the operator(s) from the normal working position. Where it is foreseen that the machine will be operated unattended, for some or all of the operating cycle, other means of access control (e.g. key pad operated locks), shall be provided to prevent unauthorised access. Visual inspection, conformance to drawings/ specifications
1.1.3 Multiple work zones Where more than one work zone is provided on a single machine, safeguards (e.g. fixed or interlocked movable guards, AOPD, ESPE) shall protect the operator(s) from adjacent active work zone hazards (e.g. when loading or unloading workpieces in a non-active work zone, cleaning).
Unauthorised movement of the machine into an adjacent non-active work zone
shall be prevented using a limiting device (eg mechanical stops, range limit switches, light beams, AOPDs)
Visual inspection, functional test to ensure compliance, conformance to drawings/ specifications
1.1.4 Guard characteristics
1.1.4.1 Height and position Where guards are floor mounted (e.g. perimeter fencing), they shall be securely fixed and have a minimum height of 1,4 m at a distance in accordance with table 2 of EN 294:1992 from the hazard zone. Any opening between the bottom of the guard and the floor shall not exceed 300 mm.
Measurements to ensure compliance with EN 294
1.1.4.2 Containment Guards shall be designed to contain and/or prevent exposure to swarf/chips, fluids and parts that can be discharged or ejected (see also 7.1.4, 17.1, 17.2 and 19.2 of table 4).
Practical check
1.1.4.3 Observation Where routine observation of the machine operation is required, means (e.g. windows) shall be provided so that this can be achieved without the need to open, remove or suspend any work zone guard or other protective device(s) (see also 8.4 lighting, of table 4).
Visual inspection
1.1.5 Interlocking
1.1.5.1 All movable guards through which frequent access to the work zone is required (i.e. more than once per shift) shall be interlocked. Opening of a guard or actuation of a protective device in mode 1 (automatic cycle - see below) shall cause hazardous movements to stop and further movement to be inhibited (see EN 1037). Measures to minimise the possible defeat of interlocking device(s) shall be taken (see clauses 5 and 7 of EN 1088:1995).
Visual inspection, practical check
1.1.5.2 If opening of an interlocked movable guard exposes operators to hazards listed from 1.1 to 1.7 of table 1, guard locking shall be provided (see EN 1088 and also 7.2.m) of clause 7). Practical check
Safety requirement and/or protective measureVerification1 Mechanical (continued) 1.1.6 Modes of operation
1.1.6.1 General
Each machine shall have at least two modes of operation (i.e. modes 1 and 2) with the option of a third mode (i.e. mode 3). The selection of a mode of operation shall be either by key switch, access code or equally secure means and shall only be permitted from outside the work zone. Selection of a mode shall not initiate hazardous situations. (See also 9.2.3 of EN 60204–1:1997)
Visual inspection, practical check
1.1.6.2 Mode 1 - Automatic cycle[automatic production] The guards shall be closed and/or the protective devices be active to permit execution of programmed sequential machine operation under numerical control.
Practical check
1.1.6.3 Mode 2 – Setting
Setting mode is a mode of operation in which adjustments for the subsequent machining process are performed by the operator.
NOTE
Assessment of tool or workpiece position, e.g. by
touching the workpiece with a probe or tool, and programme sequence checking, belong to the setting mode.
When any interlocked movable guard is open or a protective device is suspended, powered machine movements shall only be permitted under the following conditions:
a) Axis movements at a maximum rate of 2 m/min or a maximum increment of 10 mm.
Measurement
These movements shall be selected one axis at a time and may be initiated and maintained by one of the following means: – a hold-to-run control device; – an electronic handwheel; – manual data input (MDI) followed by cycle start together with an enabling device.
Practical check
b) Spindle speed shall be limited by its stopping performance which shall not exceed 2 revolutions.
Measurement
Spindle rotation shall only be initiated and maintained by one of the following means: – a hold-to-run control device – a spindle start control device together with an enabling device.
Release of an enabling device shall initiate a category 1 stop in accordance with 9.2.2 of EN 60204-1:1997.
Practical check
c) The limits of speed or incremental distance [defined in a) and b) above] shall be monitored and if exceeded, the power to the drives shall be removed by a controlled stop (Category 1 - see 9.2.2 of EN 60204–1:1997).
Examination of circuit diagrams, practical check
d) Means shall be provided to prevent hazardous movement of vertical or slant axes under gravity.
Practical check
Safety requirement and/or protective measure Verification1 Mechanical (continued) e) Automatic workpiece changing mechanisms shall remain inhibited. Initiation of their automatic movement shall only be possible by reselection of mode 1.
Practical check
Exception:For maintenance in mode 2 only, the provisions contained in 1.1 of table 4 shall be permitted.
Practical check
f) Unguarded swarf/chip conveyor movements shall only be initiated and maintained by a hold-to-run control device. Visual inspection, examination of circuit diagrams
g) Where multiple hold-to-run control device locations are provided (e.g. main control station, hand-held pendant), only one shall be functional at a time. Practical check
1.1.6.4 Mode 3 -Optional mode for manual intervention under restricted operating conditions
When provided, this mode permits use of the machine under manual or numerical control with work zone guards open and/or protective devices suspended under the following conditions:
a) This mode shall only be provided when details of the intended application are known and the required skill level of operators shall be defined in the instruction handbook (see 7.2 g) of clause 7).
Visual inspection (of instruction handbook)
b) Single axis and multiple axis vector speeds shall be limited to 5m/min.
Measurement
c) Spindle speed shall be limited by its stopping performance which shall not exceed 5 revolutions.
NOTE 1
In order to achieve this stopping requirement it may be necessary to provide tool diameter identification or measurement systems to limit the permitted speed of the spindle for each tool used. Measurement
NOTE 2
Alternative solutions to this clause have been considered during the development of this standard but no firm conclusions have been reached.
This particular problem will be re-visited in a future revision of this standard.
d) Program execution shall be initiated by cycle start control device in conjunction with an enabling device;
Practical check
e) Non-programmed movements shall be achieved as follows:
1) Spindle rotation shall be initiated and maintained by a spindle start control device together with an enabling device.
Release of an enabling device shall initiate a category 1 stop in accordance with 9.2.2 of EN 60204-1:1997.
Examination of circuit diagrams, practical test
2) Axis movements may be initiated and maintained by one of the following means: – a hold-to-run control device – an electronic handwheel – manual data input (MDI) followed by cycle start together with an enabling device.
Practical check
f) The limits of speed or incremental distance [defined in b) and c) above] shall be monitored and if exceeded, the power to the drives shall be removed by a controlled stop (category 1, see 9.2.2 of EN 60204-1:1997).
Practical check
Safety requirement and/or protective measureVerification1 Mechanical (concluded) g) The requirements d), e), f) and g) of mode 2 in 1.1.6.3 also apply. See1.1.6.3d), e), f), g)
1.1.7 Release of trapped persons Means shall be provided for the movement of machine axes for emergency purposes (e.g. release of trapped persons). These means are for example: a) With power off: – manually operated relief valves to depressurise systems under pressure; – manual release of power-actuated brakes provided that weight-balancing exists; b) With power on: – manual control facilities of power-piloted valves/drives; – control facilities to start counter motions. (see also 7.2.m) of clause 7).
Visual inspection, verification against circuit diagrams, practical check
NOTE The numbering of various provisions in this table is in accordance with Table 1 and hence missing numbers correspond to hazards which are not significant Hazards
Safety requirement and/or protective measureVerification1 Mechanical 1.1 Workpiece transfer devices (e.g. pallet changing devices, automatic workpiece changing devices)
1.1.1 Load/unload positions for operators at workpiece transfer devices shall be located outside the work zone and away from other hazardous mechanisms.
Visual inspection
1.1.2 Access to hazardous movements shall be prevented by means of fixed and/or interlocked movable guards or hazardous movement(s) shall be either stopped or inhibited by the actuation of protective devices (e,g, ESPE, AOPD).
Visual inspection, practical check
1.1.3 Where access is required with the guards open or the protective devices suspended, powered motion shall only be initiated under the control of an enabling device together with a hold-to-run device to permit step-by-step movement. When continuous movement is required, a two-hand control device shall be provided. This device shall be in accordance with 9.2.5.7 Type 3 of EN 60204-1:1997. Such movement shall be at a safe distance from the hazardous situation, see EN 574 and EN 999. No hazardous movement shall arise from the actuation of any sensor or feedback device (see 10.1.4 of EN 60204-1, 1997 and
7.2 f of clause 7 in this standard).
Examination of circuit diagrams, measurement, practical check
1.2 Swarf /chip collection and removal
1.2.1 Access to hazardous moving parts of swarf/chip collection and removal systems shall be prevented by means of fixed guards. Where operators have a need to access more frequently than once per shift, interlocked movable guards shall be provided. Guards shall be in accordance with EN 953.
Visual inspection, practical check
1.2.2 Opening an interlocked movable guard, which provides access to the hazardous moving parts of a swarf/chip system shall cause the movement to cease and remain inhibited (see also 1.1.5 of table 3 and 14.1.1 of this table).
Examination of circuit diagrams, practical check
1.2.3 If movement of a swarf/chip system with an interlocked guard open is essential (e.g. for cleaning purposes) the movement shall only be permitted under the control of a hold-to-run device with an adjacent emergency stop device. A warning sign shall indicate the hazardous area of the swarf/chip system discharge (see also 7.2 f) of clause 7).
Examination of circuit diagrams, practical check
1.3 Power transmission mechanisms (e.g. driveshafts, belts, pulleys, gears)
1.3.1 Access to hazardous power transmission parts (e g belts, chains, gears. pulleys, shafts) shall be prevented by means of fixed guards but interlocked movable guards shall be provided where operators have a need to access more frequently than once per shift.
Guard shall be in accordance with EN 953.
Visual inspection
1.3.2 Opening an interlocked movable guard, which exposes moving power transmission parts, shall cause their movement to cease and remain inhibited. Interlocking provisions shall conform to EN 1088:1995 and as a minimum to category 1 (see 6.2.2 of EN 954–1:1996).
Visual inspection
Safety requirement and/or protective measureVerification1 Mechanical (concluded) 1.3.3 Where the hazardous moving parts can be reached before they come to rest. Guard locking shall be applied to prevent opening of the guard until the hazardous movement has ceased. Delayed unlocking shall be achieved by means of a motion detector or timer control. (see 7.2 and 7.3 of EN 1088:1995 and EN 999).
Visual inspection
1.4 Pits
1.4.1 Pits in or around a machine shall be covered (e.g. floor grids) or secured against persons falling into them by e.g. – railings; – cables with roll up device; – chains (red/white, black/yellow) with a warning sign 1 m in front of the fall down position. Visual inspection
1.4.2 Where access to pits is necessary for observation, maintenance, or adjustment purposes, entry into the pit shall be via interlocked access gates which prevent machine movement in mode 1. Where powered machine movements are necessary, machine elements may be moved under the conditions set out in 1.1.6.3 of table 3 and 1.1 and 1.2 of this table .
Visual inspection
1.4.3 Safety distances between moving machine elements and pit walls or other fixed parts shall be in accordance with EN 349. Where these safety distances cannot be achieved, additional protective measures shall be provided to minimise the risk of crushing or trapping.
Measurement of distance, visual inspection, practical che
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