EN 13128:2001+A2:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheit von Werkzeugmaschinen - Fräs- und Bohr-FräsmaschinenSécurité des machines-outils - Fraiseuses (comprenant les aléseuses)Safety of machine tools - Milling machines (including boring machines)25.080.20FrezalnikiBoring and milling machinesICS:Ta slovenski standard je istoveten z:EN 13128:2001+A2:2009SIST EN 13128:2002+A2:2009en01-junij-2009SIST EN 13128:2002+A2:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13128:2001+A2
April 2009 ICS 25.080.20 Supersedes EN 13128:2001English Version
Safety of machine tools - Milling machines (including boring machines)
Sécurité des machines-outils - Fraiseuses (comprenant les aléseuses)
Sicherheit von Werkzeugmaschinen - Fräs- und Bohr-Fräsmaschinen This European Standard was approved by CEN on 7 March 2001 and includes Amendment 1 approved by CEN on 3 February 2006 and Amendment 2 approved by CEN on 24 February 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.
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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 13128:2001+A2:2009: ESIST EN 13128:2002+A2:2009

Guards on milling machines - Impact test method . 31 Annex B (informative)
Equipment for impact test . 35 Annex C (informative)
Illustrative figures used as examples . 36 Annex D (informative)
Noise emission measurement . 45 Annex ZA (informative)
####Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC, amended by Directive 98/79/EC$$$$ . 47 Annex ZB (informative)
####Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC$$$$ . 48 Bibliography . 49
Table 1 — List of significant hazards and major sources of these hazards associated with milling machines .9 Table 2 — List of safety requirements and/or protective measures and their verification procedures for manual machines with continuous powered axis feedrates not exceeding 2 m/min and/or a hold–to–run controlled rapid traverse axis speed not exceeding 5 m/min . 12 Table 3 — List of safety requirements and/or protective measures and their verification procedures for manual machines with continuous powered axis speeds in excess of 2 m/min or hold–to–run controlled rapid traverse axis speed in excess of 5 m/min . 13 Table 4 — List of safety requirements and/or protective measures and their verification procedures for mechanical hazards associated with automatic machines . 14 Table 5 — List of safety requirements and/or protective measures and their verification procedures for hazards other than those listed in tables 2, 3, and 4 . 20
!" and # $. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). This standard has been prepared to provide one means of conforming with the essential requirements of the Machinery Directive and associated EFTA regulations. Annex A is normative. Annexes B, C, D, ZA and ZB are informative. This Standard also contains a Bibliography. #For relationship with EC Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.$ 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.
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 table 1. 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 (tables 2, 3, 4 and 5). The figures in annex C 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 milling machines (see 3.1) including machines capable of performing boring operations (see 3.5). Machines covered by this standard include but are not limited to:  knee and column type milling machines (see figures C.1, C.2);  bed–type milling machines (see figure C.3);  multi–spindle milling machines (see figures C.4 and C.5);  plano–milling machines (see figures C.4 and C.5);  profile and contouring milling machines (see figure C.6),  milling and boring machines (see figure C.7). SIST EN 13128:2002+A2:2009

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 milling 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. grinding, turning, forming, EDM, laser processing) are covered by other standards (see Bibliography). 1.6 Milling machines with automatic tool changing capabilities are not covered by this standard (see prEN 12417:1996). 1.7 This standard is not applicable to milling 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, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology, methodology EN 292-2:1991 and EN 292-2/A1:1995, 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 811, Safety of machinery – Safety distances to prevent danger zones being reached by the lower limbs EN 894, Safety of machinery – Ergonomics requirements and data for the design of displays and control actuators Part 1:1997, Human interactions Part 2:1997, Displays Part 3:2000, Control actuators SIST EN 13128:2002+A2:2009

EN 50081-2, Electromagnetic compatibility - Generic emission standard – Part 2: Industrial environment EN 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards - Immunity for industrial environments (IEC 61000-6-2:1999) !EN ISO 15641, Milling cutters for high speed machining — Safety requirements (ISO 15641:2001)" 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. For other terms and definitions, see EN 292–1, EN 292–2/A1. 3.1 milling machine a machine designed to shape cold metal by the use of a rotating cutting tool 3.1.1 manual milling machine a machine where axis motion is controlled through the actuation of a handwheel or where powered single–axis motion is controlled by mechanical, electrical, or other means but without the capability for programmed multiple axis movements 3.1.2 automatic milling machine a machine capable of performing programmed multiple axis movements 3.2 boring machine a machine designed to perform boring operations (see 3.5).
Such machines are normally capable of milling operations 3.3 numerical control (computer numerical control) (NC, CNC) automatic control of a process performed by a device that makes use of numeric data introduced while the operation is in progress (ISO 2806:1994, 2.1.1) 3.4 workpiece transfer device SIST EN 13128:2002+A2:2009

1. Mechanical hazards:
1.1 Crushing
moving axes, workpiece and tool clamping setting, loading/ unloading, maintenance between fixed and moving elements of the machine Tables 2, 3; or
Table 4
moving axes maintenance within pits and
movement of operating platforms normal operation, maintenance at or near machine Table 5 – 1.1 – 1.5 1.2 Shearing moving axes machine operation between tool/ spindle and table/ workpiece
1.3 Cutting or severing spindle or tool running or cutting spindle running at spindle or tool
1.4 Entanglement rotating spindle or tool
removal of swarf/chips workpiece load/unload, posi-tional 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 work-piece on table axes; envelope of move-ment of tool in spindle head
rotating power transmission mechanisms
maintenance in or around machine
1.6 Impact moving/rotating tool spindle running at spindle or tool
automatic workpiece transfer (e.g. pallet loading system)
power-operated workpiece transfer envelope of motion of workpiece and work-piece transfer mechanisms
1.7 Stabbing or puncture moving/rotating tool (especially eccentric tools) process control at tool in spindle
Description Example(s) of related hazardous situation(s) Associated activityRelated danger zone Clause 5 Reference
1.7 Stabbing or puncture handling tools during manual tool change at sharp cutter faces (see 7.2 of clause 7)
handling swarf/chips during loading/ unloading and cleaning at workpiece, table, and swarf /chip collecting and discharge zones (see 7.2 of 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 Table 5:2.1 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 Table 5:2.2 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 Table 5:4 4.2 Interference with speech communication, acoustical signals air blast used for cleaning of tool, pallet or workpiece locations during operating cycle of machine near machine Table 5:4 6 Hazards generated by radiation 6.5 Lasers direct or reflected visual exposure to laser radiation maintenance of laser positional feedback system within machine Table 5:6.5 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 Table 5:7.1 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 Table 5:7.2 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 Table 5:7.3 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 Table 5:8.1 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 Table 5:8.2
8.4 Inadequate local lighting judgement and accuracy of manual actions im-paired during handling/ positioning of work materials and cutters during loading /unloading, process control, tool handling at load/unload, tool mounting positions Table 5:8.4 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 Table 5:8.6 8.7 Inadequate design, location or identification of manual controls inadvertent
operation of controls during setting, operating cycle
at or near machine Table 5:8.7 8.8 Inadequate design or location of visual display units misinterpretation of displayed information during setting, operating cycle
at or near machine Table 5:8.8 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 Table 5:10.1 10.2 Restoration of energy supply after an interruption unexpected movements of machine during setting, cleaning or maintenance at or near machine Table 5:10.2 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 Table 5:10.3 13 Failure of the power supply malfunctions of the control with consequent misapplication of stored energy or power.
Power workholding fails, motor overspeed.
Part break-age 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 where machine elements retained in a safe condition by the application of power or fluid pressure. Table 5:13 14 Failure of the control circuit Unexpected movements of machine during setting, cleaning or maintenance at or near machine Table 5:14 15 Errors of fitting machine elements fail or swing unexpectedly during process con-trol, tool mounting, maintenance at machine Table 5:15 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 the operating cycle of the machine at or near machine Table 5:17 18 Loss of stability, overturning of machinery unrestrained machine or machine part (maintained in position by gravity), falls or overturns during loading/ un-loading and process control, at heavy /unwieldy workpieces during maintenance (disassembly/ relocation) at machine
Table 5:18 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 Table 5:19 * This list is derived from annex A of EN 1050:1996.
NOTE General guidance for the design and 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. Table 2 — List of safety requirements and/or protective measures and their verification procedures for manual machines with continuous powered axis feedrates not exceeding 2 m/min and/or a hold–to–run controlled rapid traverse axis speed not exceeding 5 m/min
Hazard Safety requirement and/or protective measure Verification 1. Mechanical 1.1 Work zone
Adjustable cutter guard(s) or adjustable guards mounted to the machine table shall be provided to inhibit access to the cutting tool (see figures C.8 and C.9). Guards shall be in accordance with EN 953:1997.
by visual inspection of the machine
1.2 Provision for interlocked guards Since some applications require the user to fit an interlocked movable guard, all machines shall be provided with an electrical interface to connect a guard interlock.
by visual inspection of the machine and examination of circuit diagrams
NOTE Crushing, shearing and impact hazards are not normally considered significant for low–feedrate manual milling machines covered by table 2. SIST EN 13128:2002+A2:2009

1.1 Work zone 1.1.1 Guarding Work zone shall be guarded with fixed and/or interlocked movable guard(s) (see figure C.9).
Guards shall be in accordance with EN 953:1997. NOTE
EN 294 provides guidance on distances to prevent danger zones being reached by upper limbs.
However, due to practical considerations of guard heights and vertical table movements, it may not be possible to comply fully with the requirements of EN 294.
visual and practical checks
1.1.2 InterlockingMachine movements shall only be possible when the interlocked movable guard(s) are closed. Interlocking devices shall be in accordance with EN 1088:1995. Opening of an interlocked movable guard shall cause the hazardous movements to cease and be inhibited.
The stop category shall be 0 in accordance with 9.2.5.3 of EN 60204-1:1997 except for mechanisms requiring a sequenced shutdown where a category 1 stop shall be implemented. Guard locking (see EN 1088:1995, 7.4) shall be provided when opening of the interlocked movable guard provides access to these hazards during deceleration (i.e. run-down).
examination of circuit diagrams.
check to ensure that the hazardous moving parts are not accessible when the interlocking guard is opened.
1.1.3 Provisions for settingWhen powered machine movements are required with the movable guard open (e.g. for setting purposes), these movements shall only be permitted under the following conditions: a) axis movements limited to 2m/min initiated with a hold–to–run control device b) spindle rotation shall be initiated and maintained by one of the following means: – a hold–to–run control device; – a spindle start device together with an enabling device.
The spindle speed shall be limited to that capable of being stopped within two (2) spindle revolutions (no load condition). This reduced speed function shall be in accordance with table 5, 14. c) swarf/chip conveyor if provided, under hold–to–run control or other suitable protective devices.
measurements shall be made to ensure that specified speeds and/or distances are not exceeded.
1.2 Protection against impactFixed and/or interlocked movable guard(s) shall be provided to prevent access to moving machine elements with linear speeds greater than 15 m/min; for safety distances, see EN 294, EN 811.
visual inspection
Safety requirement and/or protective measureVerification1 Mechanical
1.1 Work zone
1.1.1 Primary safeguards The work zones of automatic 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 prEN 61496-2:1997, category 4 (AOPD), in accordance with EN 61496-1:1997 (PSPD). 2) Guards shall be in accordance with EN 953:1997, and interlocking devices shall be in accordance with EN 1088:1995. 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 C.10 (a), (b), (c)). 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 - see figure C.10(d)). 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).
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 field 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
Safety requirement and/or protective measureVerification1 Mechanical (continued) 1.1.3 Multiple work zones Where more than one work zone is provided on a single machine, safeguards(e.g. fixed or movable interlocked 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. (e.g. 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 mist and vapour, 17.1 fluids mists and 17.2 ejection, 19.2 contamination of floors etc., in table 5). 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, in table 5). 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 interlocking 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
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. 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
Safety requirement and/or protective measureVerification1 Mechanical (continued) 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
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 5 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 f) and g) of this European Standard). Visual inspection (of Instruction handbook)
b) Single axis and multiple axis vector speeds shall be limited to 5 m/min. Measurement SIST EN 13128:2002+A2:2009

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. 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 European Standard. Measurement SIST EN 13128:2002+A2:2009

Safety requirement and/or protective measureVerification 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 hand wheel; – 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
g) The requirements d), e), f) and g) of mode 2 in 1.1.6.3 also apply. See 1.1.6.3 d), e), f) and g). SIST EN 13128:2002+A2:2009

EN 13128:20
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