5.6.1 to 5.6.4 High pressure fluid ejection Floor area around the press Electrical hazards Parts made live by electrical equipment under fault conditionsThermal radiation hazard burns
Terms and definitions
3.1.1 band brake brake (see 3.1.2) where a flexible band lined with friction material is arranged around the circumference of a drum
3.1.2 brake mechanism (usually friction) intended to stop and hold the slide when the clutch, if provided, is disengaged
3.1.3 clutch mechanism used to impart the movement of the flywheel to the slide
A full revolution clutch is a type of clutch that remains engaged until the slide has completed a full stroke, such as in most positive key clutches Additionally, this type of clutch can only be disengaged at specific positions within the operating cycle.
3.1.5 clutch - part revolution type of clutch that can be engaged or disengaged at any point in the stroke of the slide, e.g most friction clutches
3.1.6 cycle - automatic operating mode where the slide repeats continuously or intermittently, all functions achieved without manual intervention into the danger zone after initiation
The operating cycle of the slide involves its movement from the top dead center (TDC) to the bottom dead center (BDC) and back to the TDC, encompassing all operations performed during this motion.
3.1.8 cycle - single operating mode where each operating cycle of the slide has to be positively actuated by the operator
3.1.9 dead centres points at which the tool, during its travel, is
either nearest/closest to the die (generally it corresponds to the end of the closing stroke), known as the bottom dead centre (BDC),
or furthest from the die (generally it corresponds to the end of the opening stroke), known as the top dead centre (TDC)
3.1.10 die fixed part of the tools used in a press
3.1.11 die cushion accessory for a die which accumulates and releases, or absorbs, force as required in some press operations
3.1.12 direct drive type of driving arrangement wherein no clutch is used: movement of the slide is accomplished by energising and de-energising the motor, possibly in conjunction with a brake
3.1.13 early opening interlocking guard guard associated with an interlocking device which, if opened when any dangerous movement in the tools area has ceased, does not interrupt the operating cycle
3.1.14 guard locking device mechanical device to maintain an interlocking guard gate in the closed and locked position until the risk of injury
3.1.15 limited movement control device; inching device control device, a single actuation of which, together with the control system of the machine, permits only a limited amount of travel of a machine element
A mechanical press machine is engineered to transfer energy from a prime mover to a tool through mechanical means, primarily for the purpose of forming or shaping cold metal or materials that contain cold metal This energy transfer is achieved via a flywheel and part revolution clutch, or through a direct drive mechanism.
Monitoring (M) is a crucial safety function that activates a safety measure when a component's ability to perform its function is compromised or when process conditions change, leading to potential hazards.
3.1.18 muting temporary automatic suspension of a safety function(s) by safety related parts of the control system during otherwise safe conditions in the operation of a machine
3.1.19 overall system stopping performance; overall response time time occurring from actuating the protective device to the cessation of hazardous motion, or to the machine assuming a safe condition
3.1.20 overrun movement of the crankshaft past a defined stopping point, e.g TDC
3.1.21 overrun monitoring device device which provides a signal to inhibit further machine initiation when the overrun exceeds the pre-set limit(s)
3.1.22 position switch switch which is operated by a moving part of the machine when this part reaches or leaves a predetermined position
Redundancy (R) refers to the implementation of multiple devices, systems, or components within a system to guarantee that if one fails to operate effectively, another is ready to take over its function.
3.1.24 shut height distance from the bed-plate surface to the slide surface measured with the maximum variable stroke, stroke down and slide adjustment up
The single stroke function feature restricts the tool's motion to a single operating cycle with each clutch engagement, even when the stroke initiating mechanism, such as a pedal, remains in the active position.
3.1.26 slide main reciprocating press member which holds the tool
3.1.27 tool moving part of the tools
3.1.28 tools term for the combination of tool and die
3.1.29 tools - closed tools designed and constructed to be inherently safe (see Figure D.1)
Abbreviations
BDC Bottom dead centre (see 3.1.9)
TDC Top dead centre (see 3.1.9)
PES Programmable electronic system PPS Programmable pneumatic system
AOPD Active opto-electronic protective device
ESPE Electro-sensitive protective equipment
2 Clutch/brake 7 Slide flange, tool holder
Figure 1 — Example of mechanical power press (tools area safeguards not shown)
4.1 The list of hazards contained in Table 1 is the result of a risk assessment, carried out as required by
EN 1050 outlines essential technical measures and usage information for mechanical presses, focusing on risk assessment to address identified hazards The standard emphasizes the elimination or reduction of risks through the guidelines provided in Clauses 5 and 7, as well as Annexes A, B, C, E, and F.
Risk assessment involves anticipating potential access from all directions, including overruns and unintended incidents such as strokes or gravity falls It identifies risks to operators and others who may enter danger zones, considering all possible hazards throughout the press's operational life Additionally, the assessment analyzes the impact of potential failures in the control system.
4.3 In addition, the user of this standard, i.e the designer, manufacturer or supplier, shall conduct a risk assessment in accordance with EN 1050 with particular attention to:
the intended use of the press including maintenance, tool-setting and cleaning, and its reasonably foreseeable misuse;
the identification of the significant hazards associated with the press (see 4.4)
Table 1 of this standard outlines key hazards and their corresponding danger zones typically linked to mechanical power presses During the risk assessment process, it is essential for the designer to confirm that the hazards listed in Table 1 are comprehensive and relevant to the specific press being evaluated.
Table 1 — Significant hazards, danger zones, preventive measures
Preventive measures: relevant clauses of this standard
Crushing hazard Tools area: 5.3 to 5.5 4.2.1
Shearing hazard - between moving tools Annexes A, B, C, D
Cutting or severing hazard - moving slide and E
Entanglement hazard - moving die cushions
Drawing-in or trapping hazard - work-piece ejectors
- guards Impact hazard Moving parts of electrical, hydraulic and pneumatic equipment
Motor and drive machinery 5.6.1 to 5.6.3 Mechanical handling device
During installation, setting operation , maintenance
High pressure fluid ejection hazard Hydraulic systems 5.8.3 4.2.1
Slip, trip and fall hazards All work at heights 5.7 4.10
Floor area around the press
Direct contact hazard Electrical equipment 5.8.1 4.3
Indirect contact hazard Electrical equipment 5.8.1 4.3
Parts made live by electrical equipment under fault conditions
Thermal hazards resulting in burns and scalds, by a possible contact of persons
Brakes, clutches, parts of the hydraulic system 5.8.2 4.4
Hazards generated by noise resulting in hearing losses (deaf- ness)
Any area at the press where there is a risk to hearing 5.8.4 4.5
Hazards generated by vibra- tion Parts of the press where the risk occurs, e.g the workstation(s) 5.8.5 4.6
Hazards generated by mate- rials and substances proces- sed, used or exhausted by machinery, for example:
Hazards resulting from contact with or inhalation of harmful fluids, gases, mists, fumes and dusts
Hydraulic systems; pneumatic systems and their controls; toxic work materials
Fire or explosion hazards Exhaust ventilation and dust collection equipment
Hazards generated by neglect- ing ergonomic principles in machine design (mismatch of machinery with human characte- ristics and abilities) caused, for example, by unhealthy postures or excessive efforts
The working position and controls for operators and maintenance staff handling tools
5 Safety requirements and/or measures
Introduction
Mechanical presses, as defined by this standard, vary in size from compact, high-speed machines operated by a single individual, which produce small workpieces, to larger, slower machines that require multiple operators for handling complex, sizable workpieces.
The methods or measures to be implemented to eliminate the significant hazards are specified in Table 1 The methods and measures for reducing associated risks are as follows:
basic design considerations for major press components or systems (see 5.2);
safeguarding against mechanical hazards in the tools and associated area under different modes of production (see 5.3 and Tables 2, 3 and 4);
protection against hazards due to control system or control component failures (see 5.4);
safeguarding against hazards which can occur during tool-setting, trial strokes, maintenance and lubrication (see 5.5);
safeguarding against other hazards (see 5.6 to 5.8)
Presses must adhere to the safety requirements outlined in this clause and be designed in accordance with EN ISO 12100-1 principles This includes addressing relevant but not significant hazards, such as sharp edges, that are not specifically covered by the standard.
Basic design considerations
Brakes and clutches
5.2.1.1 Fluid or air pressure shall not be used to apply a brake unless means are provided to ensure that, in the event of loss of fluid or air pressure, the integrity of the brake is maintained and the clutch is disengaged Diaphragms shall not be used to apply a brake
5.2.1.2 The designer shall ensure that: a) the springs used for applying the brake or disengaging the clutch are of compression type; b) multiple spring assemblies are used; c) all the springs are closely uniform in dimension, quality and rating; d) the means of loading the springs are such that, when adjusted, the spring anchorages can be locked to prevent slackening back; e) the arrangements for spring housing and guiding, and of guide pins, are such as to minimize binding; f) the brake can function even if 50 % of the spring assembly has failed
5.2.1.3 The engagement and disengagement of the clutch and brake shall not affect their safe function
NOTE Combined clutch and brake units are recommended so as to reduce the possibility of the overlapping of their engagement
5.2.1.4 The brake and the clutch shall be designed so that failure of component e.g for power transmission or screws do not stress other components in such a way that rapid consequential dangerous failure is possible
5.2.1.5 Any heat generated which can cause a hazardous situation shall be dissipated
5.2.1.6 Effective arrangements shall be made to prevent penetration of lubricants to the brake friction surfaces, when this is not intended by the brake design
5.2.1.7 The clutch and brake shall be designed in such a way that any moisture, dust or lubricating oil, which breaks or corrodes packing material (e.g gaskets and seals), cannot influence the required function adversely, e.g by obstructing an air channel or otherwise affecting their efficiency
5.2.1.8 The design shall be such that the accumulation of dust, fluid or debris is minimized in areas likely to give rise to inefficient brake performance and broken or loose components shall not cause brake failure
5.2.1.9 Band brakes shall not be used on mechanical presses for the purpose of stopping the slide.
Presses with part revolution clutches (friction clutches)
5.2.2.1 Clutches shall be of a capacity capable of engaging and disengaging the stroke in the correct position, without excessive temperature rise, under conditions of maximum use of the clutch
5.2.2.2 Sufficient working clearances shall be provided so as to ensure that, under the severest conditions of operation, friction drag leading to undesired movement of the driven members will not take place
5.2.2.3 Arrangements shall be made to prevent the accumulation of debris evolved from frictional surfaces in places where it can give rise to inefficient clutch performance, and for its effective dispersal
5.2.2.4 The clutch and its control system shall be designed so that, in the event of failure of pneumatic, hydraulic or electrical supply, the clutch is disengaged and the brake is immediately applied
5.2.2.5 If diaphragms are used in a clutch system, measures shall be taken to avoid damage by the cutting effect of sharp edges or wearing by rough surfaces Evacuation of air shall not be prevented due to slackening of the diaphragm, e.g due to material fatigue.
Hydraulic and pneumatic systems - Common features
5.2.3.1 The requirements in EN 982 and EN 983 shall be taken into consideration in designing hydraulic and pneumatic systems, which shall comply with the particular requirements in 5.2.3, 5.2.4 and 5.2.5
5.2.3.2 Filters, pressure regulators and low pressure cut-off arrangements shall be provided
5.2.3.3 Devices shall be provided to ensure that the permitted range of working pressure is maintained
5.2.3.4 Bowls of glass and plastic shall be protected to prevent injury from flying particles without affecting visibility
5.2.3.5 All piping, pipe fittings, passages, surge or storage tanks and cored or drilled holes, shall be free from burrs or foreign matter which can cause damage to valves or clutch and brake operating parts See 5.3.4.2 of
5.2.3.6 Each run of piping shall, where practicable, be continuous from one piece of apparatus to another Precautions shall be taken to prevent damage by thermal expansion Rigid piping shall be securely supported at frequent intervals to avoid vibration or movement Care shall be taken to avoid kinking of flexible pipes used to carry fluids Such kinking can cause traps which prevent the fluid exhausting This applies particularly to piping feeding the running joint of the clutch and brake
5.2.3.7 Where a drop in pressure can lead to unintended dangerous motion of the slide, flexible piping shall not be used, pipes and pipe connections shall be chosen to prevent such a loss of pressure Such pipe connections shall not be made with compression fittings, glued rings or similar devices They shall be made by means of positive connecting joints or by the welding of two fitted surfaces
5.2.3.8 Operating valves shall not depend on connected piping for support This is to avoid undesirable effects from vibration which can affect both valves and piping
5.2.3.9 Operating valves shall be so designed as to ensure that, when in the non-operating position, leakage past the inlet valve will escape sufficiently freely to prevent build-up of pressure in the clutch operating cylinder
5.2.3.10 Operating valves shall be so designed that it is not possible for both the inlet port and the exhaust ports to remain closed at the same time
5.2.3.11 Exhaust ports and piping between clutch operating cylinders and valves shall be of sufficient capacity to ensure prompt release of fluid from clutch operating cylinders Precautions shall be taken to ensure that the exhaust ports of operating valves are of adequate size to prevent residual pressure in the cylinder The valve shall be selected so that the pressure ratio between clutch and brake is such that the residual pressure in the cylinder will not become excessive in the event of a valve fault
NOTE Normally, a ratio of at least 3,5 to 1 between spring pressure in the brake and residual pressure in the cylinder is satisfactory
5.2.3.12 Control valves and other control components (e.g regulators and manometers) shall be mounted in positions which provide adequate accessibility and avoid damage (see 5.2.1 of EN 982:1996)
5.2.3.13 Where valves are manually or mechanically (as distinct from electrically) operated, the arrangements for restoring the valves to the position of clutch disengagement at the end of the cycle shall be positive in character (i.e when the actuator of the valve is released the valve shall automatically move to the safe position) See also 5.4.9.
Pneumatic systems
5.2.4.1 Where valves or other parts of the press control system require lubrication, visible automatic means of lubrication shall be provided to introduce the oil into the air line in suitable form
5.2.4.2 Where silencing systems are fitted, they shall be provided and installed in accordance with the valve manufacturer's instructions for use in safety systems, shall not affect safety function and their effect on braking performance shall be taken into account Only non-clogging direct to atmosphere silencers are permissible
5.2.4.3 Water separators shall be provided.
Hydraulic systems
5.2.5.1 Suitable pressure relief valve(s) shall be provided in hydraulic systems having a hydraulic pumped supply Means shall be provided to release trapped air either by a bleed device or a self-evacuating system
5.2.5.2 Hydraulic systems shall be designed so that escaping fluid shall not cause injury
5.2.5.3 Hydraulic systems which include accumulators shall allow the fluid pressure to fall when the pressure generating unit is stopped If this is impossible, the parts of the circuit which are maintained under pressure shall be supplied with a manual discharge valve in addition to the other devices required by standards or rules concerning accumulators (relief valves, pneumatic gauges, etc.) and bear a very clear indication (by means of a descriptive plate) of the hazard.
Slide adjustment and stroke adjustment
5.2.6.1 Provision shall be made to ensure that a slide adjustment motor cannot be set in motion while the clutch control circuit is energised This requirement shall not apply when the slide adjustment motor is operable in presses for automatic cycle and programmable control systems to compensate, for example, for wear of the tools during the press operation
5.2.6.2 The means of controlling the slide adjustment shall be clearly identified
5.2.6.3 The slide adjustment shall be limited by suitable means
5.2.6.4 Means shall be provided for securing, e.g by locking, the slide adjustment and the stroke adjustment in the set position during production
5.2.6.5 Securing means shall be provided to prevent a stroke being made while the powered stroke adjustment motor is in operation.
Mechanical hazards in the tools area
The primary hazard at mechanical presses lies in the tools area, necessitating the implementation of preventive measures to address associated risks Sections 5.3 to 5.5 outline the necessary safeguards for the danger zone around tools, including moving die cushions and work-piece ejectors Safeguarding methods, along with production modes and operational requirements for control and monitoring system design, are detailed in Tables 2, 3, and 4.
single cycle: manual feed or removal (Table 2);
automatic cycle: manual feed or removal (Table 3);
automatic cycle: solely automatic feed and removal (Table 4)
Designers, manufacturers, and suppliers must choose safeguarding methods that minimize risks to the greatest extent possible, taking into account the significant hazards outlined in Table 1 and the production modes detailed in Tables 2 and 3.
The safeguarding measures outlined in EN ISO 12100-1 and EN ISO 12100-2 are essential for protecting operators using tools These measures include closed tools, fixed enclosing guards, interlocking guards with locking mechanisms, control guards with guard locking, early opening interlocking guards, and electro-sensitive protective equipment (ESPE) that utilizes active opto-electronic protective devices (AOPDs) Each of these safety features is designed to enhance operator safety and comply with relevant standards.
The article discusses various safety standards and control devices, including EN 999, EN 61496-1, and CLC/TS 61496-2, specifically referencing sections 5.3.13, 5.3.15, and Annex C It highlights the importance of two-hand control devices as outlined in EN 574 and EN 999, as well as hold-to-run control devices mentioned in EN ISO 12100-1:2003, which should operate with a slow closing speed of equal to or less than specified limits.
10 mm/s) principally for tool-setting (see 5.5)
The above methods of safeguarding shall also protect against risks at ancillary loading and unloading devices which are an integral part of the machine
The chosen safeguarding measures outlined in section 5.3.2 are designed to ensure the protection of all individuals who may access the danger zone during various activities, including operation, setting, maintenance, cleaning, and inspection, as detailed in section 4.2.
When a mechanical press can be manually loaded or unloaded, the safety measures should not depend solely on closed tools or fixed guards, unless these are specifically designed as part of the press for a particular purpose.
5.3.5 The requirements of the safety measures listed in 5.3.2 are given in 5.3.9 to 5.3.15 and shall be met in addition to those established by the relevant standards (see Clause 2)
5.3.6 The guards and protective devices provided shall be at least interfaced with the control system of the press in the same category as required for these guards and devices
When work on the press necessitates access to the danger zone from multiple sides, it is essential to implement arrangements for installing a guard or a protective device that offers equivalent safety for the operator on each side, in accordance with the specifications outlined in Annexes A, D, and C.
In cases where a large press is utilized for unique pressing of substantial components, such as pressure vessel ends, and implementing a guard is not feasible, it is essential for the designer, manufacturer, and supplier to ensure a safe working method for the user This includes providing controls that can be positioned safely for optimal visibility of the tools and workpiece, along with additional audible or visual warning signals as per EN 842 If the press is not solely dedicated to this specific task, the guidelines outlined in sections 5.3.2 to 5.3.6 must be adhered to.
Closed tools must be designed to be inherently safe, ensuring that their openings and distances comply with the specifications outlined in Table 4 of EN 294:1992, without exceeding 6 mm Additionally, any potential crushing hazards outside of the closed tools should be mitigated in accordance with Table 1 of EN 349:1993 For further details, refer to Annex D.
Fixed enclosing guards must adhere to EN 953 standards and be securely attached to the machine, a rigid structure, or the floor Additionally, the feed openings should meet the specifications outlined in Table 4 of EN 294:1992.
Interlocking guards, including early opening interlocking guards and control guards, must adhere to EN 953 standards to ensure safety by preventing access to danger zones during hazardous movements The initiation of the stroke should be blocked until the guard gate is securely closed Additionally, interlocking devices must be designed according to section 6.2.2 of EN 1088:1995, while the safety-related components of the control system must meet category 4 requirements of EN 954-1:1996 Control guards are also required to comply with sections 3.25.6 of EN ISO 12100-1:2003 and 5.3.2.5 of EN ISO 12100-2:2003.
When implementing an interlocking guard as a control measure, it is essential to ensure that individuals cannot stand between the guard and the danger zone This can be achieved through supplementary safety measures, which may include an AOPD (type 4), a permanently fixed guard (such as one that is welded), or an interlocking guard that complies with section 6.2.1 of EN 1088:1995.
Control guards are permitted only when the opening stroke length is 600 mm or less and the press table depth is 1,000 mm or less However, these limitations do not apply if the control guard is operated by a hold to run control device To prevent unintended cycle initiation due to gravity, control guards must be securely held open using mechanisms such as springs or counterweights.
According to section 5.3.11, guards must be equipped with either guard locking mechanisms to ensure that the guard gate remains closed until all hazardous movements in the tool area have stopped, or they should be designed to halt any dangerous movement before reaching the danger zone.
Early opening interlocking guards can also be control guards without guard locking
AOPDs in the form of light curtains must adhere to type 4 of EN 61496-1:2004 and be constructed according to CLC/TS 61496-2:2003 Access to danger zones is restricted to the AOPD detection zone, with additional safeguards to prevent access from other directions If individuals can stand between the AOPD and the danger zone, extra detection measures must be implemented, ensuring undetected gaps do not exceed 75 mm Dangerous movements must not be initiated while any part of the body interrupts the AOPD, and reset controls should provide a clear view of the danger zone, with only one reset device per detection zone When using reflective AOPDs, additional reflectors must not allow undetected items of specified thickness within the detection zone unless further safety measures are in place For cycle initiation, the press table must be at least 750 mm high, with guards permanently in place to prevent access to tools The opening stroke length should not exceed 600 mm, and the detection capability must not exceed 30 mm Reset functions must be actuated before the first cycle, and the initiation of press motion upon clearing the AOPD curtain is limited to a pre-set time of 30 seconds If multiple AOPDs are present, only one can be selected for cycle initiation at a time, and switching off the AOPD must also deactivate indicator lights.
The control and monitoring system
Control and monitoring functions
This sub-clause pertains to all safety-related components that control or monitor the operation of moving parts in the press or its tools The design of electrical systems must adhere to EN 60204-1:1997, while EN 954-1:1996 should be followed for the safety-related aspects of electrical, hydraulic, pneumatic, and mechanical systems.
5.4.1.2 Control systems shall include safety functions designed in such a way that controls have to be re- actuated in order for the press to perform a stroke: a) after changing the mode of control or operation; b) after an interlocking guard has been closed; c) after a manual reset of the safety system; d) after an operating power failure; e) after a primary pressure failure; f) following actuation of tool protective device or part detector; g) after removal of an interlocked mechanical restraint device
5.4.1.3 In the event of an intervention of a safety system (interlocking guard, ESPE using the AOPD), separate manual reset functions are required to restore the normal intended operation: a) if a person can pass through an interlocking guard; b) if an ESPE using the AOPD used for cycle initiation is not interrupted in a pre-set time; c) if an ESPE using the AOPD is interrupted during any dangerous movement in the cycle; d) if an ESPE using the AOPD protects sides of the press from which the press is not operated
Reset controls must be positioned within sight of the danger zone while remaining out of reach Additionally, the reset functions should comply with at least one system that includes monitoring (S & M).
5.4.1.4 This sub-clause applies to presses fitted with protective devices of the following types, namely:
early opening interlocking guards and control guards;
two-hand control devices used for normal operation
This sub-clause does not apply to presses used for automatic feed or removal working in automatic cycle and fitted with an interlocking guard with guard locking (see Table 4)
In the event of a fault in the safety-related components of protective devices or control systems, several critical safety measures must be upheld: unintended machine start-up must be prevented, the protective device's safe operation must be ensured, and the machine must be stoppable during hazardous movements Additionally, the control system is required to halt the machine immediately during dangerous phases, such as the closing stroke, or at the end of the operating cycle at the latest Furthermore, the control system must block the initiation of any subsequent production cycles until the fault has been resolved.
In order to meet these requirements, the safety related parts of the control systems shall conform to category 4 of
EN 954-1:1996 The start and stop functions in the safety related parts of the press control system shall be hardwired, redundant and monitored (R & M)
5.4.1.5 Where a press is subject to considerable shock and vibration, the design of the control system shall take into account the requirements of: a) 4.12.1 of EN ISO 12100-2; b) 5.2.1 of EN 982:1996; c) 5.2 of EN 983:1996; d) 12.1 of EN 60204-1:1997
5.4.1.6 The redundant and monitored press control system shall operate in two separate functioning systems Either system shall be independently capable of stopping the hazardous movement irrespective of the condition of the other Failure of either system shall be detected through monitoring and another closing stroke prevented If failure of one system is self revealing i.e the loss of the function itself prevents the next operating cycle, further monitoring of that system is not required.
Part revolution clutch presses: redundancy and monitoring of clutch/brake control systems,
5.4.2.1 Redundancy and monitoring of clutch/brake control systems, and overrun monitoring shall be provided to protect an operator in all cases in which the safeguarding system does not prevent access to the danger zone before the slide has stopped, e.g., for: a) ESPE; b) early opening interlocking guards;
1) where a fault occurs in one channel of a two channel control system, so that the other channel remains operative;
2) where a fault occurs during parts of the cycle other than the dangerous phase of the closing stroke c) two-hand control devices
"Monitoring" and "redundancy" are terms defined in 3.1.17 and 3.1.23 respectively
5.4.2.2 Interlocking guards fitted with a guard locking device shall be provided with redundancy and monitoring of the clutch/brake control system (overrun monitoring device is not required)
5.4.2.3 Where the provision is necessary for redundancy and monitoring of the clutch/brake control system, this shall conform to the following requirements: a) the press shall be fitted with either at least two single valves or a double bodied solenoid operated valve which directly control the fluid to the operated clutch and brake, or the equivalent in the case of other forms of drive; b) the valve solenoids shall be connected to the control circuit by separate wiring so that a single fault in the wiring cannot activate both solenoids; c) it shall be established that a short circuit between connections of the safety valve (e.g solenoid to solenoid, or solenoid to self-monitoring assembly) will be detected automatically and will not lead to additional or unexpected motion of the slide; d) where for the valve monitoring function there is a need for sensors detecting the valve state, these sensors shall be an integral part of the valves The valve may have an inherent monitoring system in which valve failure is self-revealing; e) the monitoring shall be dynamic with a frequency of at least once per cycle and shall ensure that, in the case of a failure within the valve(s), the clutch is disengaged and the brake applied; f) it shall only be possible to restore further operation of the press by a restricted means, e.g by tool, key or electronic password
5.4.2.4 Where the provision is necessary for overrun monitoring, this shall conform to the following requirements: a) manually fed presses fitted with protective devices of the type listed in 5.4.1.4 shall include overrun monitoring devices to ensure that, if the crankshaft overruns its normal stopping position by an amount specified by the manufacturer, maximum 15° and preferably 10°, a stopping signal shall be immediately initiated and no new cycle initiation shall be possible; b) it shall only be possible to restore further operation of the press by a restricted means, e.g by tool, key or electronic password; c) where the cams to the overrun monitoring device are driven from a camshaft which is indirectly driven from a crankshaft, e.g by a duplex chain drive between the camshaft and the crankshaft, indirect drive shall be monitored in such a way that, if it fails, a stopping signal shall be initiated and no new cycle initiation shall be possible until the fault is eliminated
5.4.2.5 The cams and relevant switches for overrun monitoring, single cycle stop function and muting shall be linked one with another in a positive way so that the relative position between the cams, and the relative position between the switches cannot be altered However, on presses fitted with a variable speed arrangement, the single cycle stop function switch may be capable of separate adjustment All cams shall be positively secured to the shaft All cams and relevant switches shall be in a locked enclosure
5.4.2.6 In cases where the stroke length can be varied, adjustment of cams or cam operated switches used for cycle control shall be linked in a positive way so that their relative position cannot be altered, in order to minimize the probability of miss-setting by the user, e.g to compensate for deterioration in braking performance which should be remedied by maintenance of the brake
5.4.2.7 If the camshaft is connected to the crankshaft by a clutch, the clutch engagement shall be positive, e.g by gearing
5.4.2.8 The maximum alteration of the rotary cam arrangement shall be mechanically limited to an angle of 60°, preferably 45° See Annex F
5.4.2.9 Cam discs shall be so applied that a wrong or unintended fitting cannot cause accidents, and: a) the limit switches and cam for control of the press shall be fixed to each other and adequately secured Unsecured nuts or bolts are not permissible; b) the position of the limit switches and cam plates in relation to each other shall be marked; c) the possibility of re-adjustment of limit switches or cam shall be limited by fixed end stops, so that the muting time during the closing movement of the press cannot exceed the press overall response time with any combination of speed and length of stroke; d) there shall be no possibility of damage to the impulse device when the press is reversed.
Muting
5.4.3.1 Muting (see 3.1.18) may be provided for ESPE using AOPDs and two-hand control devices They shall only be muted at a point in the opening stroke, or when the dangerous phase of the closing stroke is passed and there is no risk of injury at the tools Trapping points at ejectors and die cushions shall be taken into account The safeguarding system shall become operative again at or before the start of the down-stroke
To ensure safety, the muting position must be protected from unauthorized adjustments through the use of specialized tools, key access, or electronic passwords Additionally, any potential hazards during the opening stroke should be mitigated with fixed guards It is also essential to monitor the signal that triggers the muting process.
5.4.3.2 Muting may also be provided for the gate of an interlocking guard fitted to a press, where early opening of the gate is allowed when the dangerous phase of the closing stroke has passed (see 5.4.2).
Programmable electronic systems (PES), programmable pneumatic systems (PPS) and safety
5.4.4.1 The use of PES and PPS shall not reduce any level of safety laid down in this standard
5.4.4.2 Where a press is controlled by a PES or a PPS, the safety related functions shall not rely solely on the PES or PPS.
Selector switches
5.4.5.1 Where there is a choice of modes of operation, cycle initiation or safety system of the press (e.g single stroke, inch or continuous, front or back, or front and back), selector switches shall be provided The design shall ensure that, for each position not in use, circuits are completely isolated by positively operated contacts, or by redundant and monitored hardware If the switch is set in an intermediate position, no operation shall be possible The control system shall ensure that no start-up is initiated when the selector switch is operated
5.4.5.2 Where one selector switch is provided, it shall be used to select the appropriate mode of safeguarding, which may be two or more guards or protective devices (see 5.3.3) Where two or more selector switches are provided and the mode of safeguarding is connected to the control system, the chosen mode of operation shall be automatically linked to the corresponding mode of safeguarding
5.4.5.3 If a press is also intended to be used according to 5.3.2 a) or b) and at the same time operated, e.g by foot switch, without any other safeguarding, this mode of production shall be chosen by an additional selector switch operated by a separate key or within a key locked enclosure The selection of this mode shall automatically give a clear indication at the press that only closed tools or fixed enclosing guards shall be used
5.4.5.4 If there is more than one operator at the press, the level of protection shall be the same for each operator Where a number of two-hand control devices or de-connectable control stations are used, the press shall only be operable if the combination selected corresponds exactly to the combination physically connected to the press
5.4.5.5 Selector switches for safety related functions shall be key operated, according to 9.2.3 of
EN 60204-1:1997 The selection shall be visible and clearly identifiable.
Isolation switch
An isolation switch within reach of the operator shall be provided to allow the safe disconnection of the clutch.
Position switches
Position switches in presses serve two critical safety functions: first, cyclic position switches, which include muting, overrun, and top dead center (TDC) limit switches; and second, interlocking guard gate switches, as outlined in Clause 5 of EN 1088:1995.
5.4.7.2 The means of operation of the switch and the switch itself shall be designed to maintain their correct relationship to one another, the operating cam and particularly the stroke
5.4.7.3 The mechanism, e.g cam and follower, shall be so designed that reverse rotation is possible without damage
5.4.7.4 On presses used for manual feed or removal, all shaft position switches controlling slide movement shall be of electro-mechanical type Requirements for redundancy and monitoring of the function are specified in 5.4.1.4
5.4.7.5 Proximity switches may be accepted for the rotary cam arrangement of the crankshaft on solely automatically running presses If redundancy and monitoring are required (see Table 4), the proximity switch units shall achieve redundancy and monitoring.
Control devices
5.4.8.1 Push button, foot switch and start control devices shall be shrouded to prevent accidental operation Foot switches shall permit access from one direction only and by one foot only Treadles shall not be used
5.4.8.2 Emergency stop buttons shall on actuation stop all dangerous movement, functioning as category 0 in 4.1.5 of EN 418:1992
5.4.8.3 There shall be at least one emergency stop button within direct reach of each operator including the operator(s) at the rear of the press Any de-connectable two hand control station shall not incorporate an emergency stop button if the press can be operated while this two hand control station is disconnected (see also 5.4.5.4 and 7.2.2j))
5.4.8.4 In order to avoid unintended start-up, portable pedestals or pendants incorporating start buttons shall be designed in accordance with both 4.4.8 of EN 60204-1:1997, with regard to stability and support, and 10.6.
Valves
Manual override devices in valves must feature a captive lid or cover that can only be opened with a tool or key Additionally, electrical override devices should be key-operated, and their functionality is restricted to when the slide is in the BDC position, with the motor turned off and the flywheel halted.
Tool-setting, trial strokes, maintenance and lubrication
5.5.1 The machine shall be designed so that tool-setting, maintenance and lubrication can be carried out safely
The need for access and manual intervention during setting and maintenance shall be minimized, e.g an automatic system or remote application may be used for lubrication
Facilities must be available to enable the movement of the slide while ensuring that tool-setting, maintenance, and lubrication can be performed with guards and protective devices in place and operational.
In situations where manual operation is not feasible, at least one of the following safety measures must be implemented: a) a hand-operated crankshaft rotation with power disconnected; b) a slow-speed control device that operates at 10 mm/s or less; c) a two-hand control device compliant with section 5.5.9, designed to prevent production use by requiring the cycle to stop at least three times during a single crankshaft revolution; d) the use of an inching device.
5.5.3 All trial strokes (single operating cycle) after tool-setting or adjustment are considered in this standard as production strokes, and the safeguarding shall meet the requirements laid down in 5.3
5.5.4 Manually adjustable feeder devices shall be capable of being set with the slide stationary
When manually rotating the crankshaft with a bar or similar device while the main motor is off, a safety mechanism must be in place to prevent clutch re-engagement until the flywheel has completely stopped This mechanism can be a user-nonadjustable timer or a motion detector, and it should be actively monitored Additionally, precautions must ensure that the bar cannot be accidentally left in place during normal operation, and at least a portion of the flywheel must be visible to confirm its stationary status.
Manufacturers must ensure that control devices are installed on each accessible side of the press, allowing at least one person on each side, who has a clear view of the access zone, to be involved in the initiation process if protective devices cannot be maintained during normal production.
For applications where multiple individuals are expected to be present on one side, it is essential to include additional devices such as enabling devices, selector switches, and warning signals.
5.5.7 If a movable guard has to be opened for tool-setting, or maintenance it shall be interlocked (see 6.4.3 of
The minimum requirement for interlocking at movable guards, which are opened or removed solely for tool-setting or maintenance, is a positive opening operation switch that meets EN 1088 standards Additionally, the connection to the control system's operative parts must not depend on a single relay.
Two-hand control devices must meet specific standards, including compliance with at least type II as outlined in Table 1 of EN 574:1996 Additionally, it is essential that output signals cannot be initiated using just one hand or by combining the hand and elbow of the same arm.
5.5.10 Hold-to-run control devices and inching devices shall be hardwired and the safety related parts of the control system shall conform to category 2 of EN 954-1:1996
The inching device must produce minimal movement to avoid hazardous situations, regulated by either time or distance controls The slide movement is restricted to a maximum of 6 mm per inching step when the crankshaft is positioned at 90°.
5.5.12 Two-hand control devices or hold-to-run control devices provided only for tool-setting shall be arranged in such a way as to be unsuitable for normal use
The connection between hold-to-run control devices, two-hand control devices, inching devices, and the safety-related components of the control system must not depend solely on a single relay.
5.5.14 The press and its safeguarding shall be designed so that periodic examinations can be carried out using such tools as are provided with the press.
Mechanical hazards - other
Drive and transmission machinery, along with ancillary devices integral to the press, must be adequately safeguarded This includes the use of fixed guards for areas accessed once or less per shift, movable guards interlocked with the control system for more frequent access, and interlocking guards with locking and delayed unlocking mechanisms when dangerous movements do not stop before reaching the danger zone.
The guards listed above are not required if the danger zone is out of reach according to Tables 1 and 2 of
EN 294:1992 and access is not required for regular maintenance (e.g lubrication, setting, cleaning)
5.6.2 The delayed unlocking shall be arranged in such a way that a timer or a motion detector controls the guard locking
5.6.3 The safety related parts of the control systems for interlocking devices (see EN 1088) shall conform at least to category 1 of EN 954-1:1996
5.6.4 Ancillary devices which are not controlled by the press shall be additionally interlocked to the press control system so that during any intervention no hazardous situation can arise See 1.4
To mitigate ejection hazards posed by machine components, it is essential to eliminate these risks through effective design or by implementing additional shielding Such measures must be robust enough to withstand anticipated forces, as outlined in section 8.1 of EN 953:1997, and should also consider the guidelines in section 7.2.2 i) regarding workpieces and tools.
Slips, trips and falls
When raised work stations are installed with machinery, it is essential to equip them with sufficient guard rails and toe-boards Additionally, safe access to these work stations must be ensured, in accordance with EN 14122 standards.
5.7.2 The press shall be designed, constructed and supplied so as to minimize the risk of slips, trips and falls in the press area.
Protection against other hazards
Electrical hazards
All electrical equipment shall be designed and constructed to prevent electrical hazards (e.g shocks, burns) in accordance with Clause 6 of EN 60204-1:1997.
Thermal hazards
To prevent burns from accessible components of the press, such as brakes, clutches, and parts of the hydraulic system, it is essential to implement shielding and insulation These measures are necessary to ensure that temperatures do not exceed the recommended limits outlined in EN 563.
High pressure fluid ejection hazards
Additional shielding, e.g screens, shall be provided to flexible piping installed adjacent to an operator's working position to reduce the risk resulting from a failure in the flexible piping system.
Hazards generated by noise
5.8.4.1 The press shall be so designed and constructed that risks resulting from the emission of airborne noise are reduced to the lowest level taking account of technical progress and the availability of means of reducing noise, in particular at source
When designing a press, the information and technical measures to control noise at source given in
EN ISO 11688-1 shall be followed
5.8.4.2 The design shall take into account noise from each source Appropriate technical measures for reducing noise at the main sound sources of the press are listed below: a) transmission noise flywheel and gearwheel damping facilities; b) pneumatic exhaust silencers; c) power generation source acoustic panels (partial or total); d) noise at the tools damping facilities on the press; e) work-piece ejection silenced nozzles; f) feeding and transfer systems acoustic enclosures, damping facilities; g) structurally transmitted noise anti-vibration machine mounts
Alternative measures that achieve equal or greater noise reduction efficiency may be implemented Ultimately, the declared noise emission values are the key factor in determining a machine's noise output Manufacturers must provide essential information regarding the noise reduction measures integrated into their products.
5.8.4.3 The measurement and declaration of noise emission values shall be made according to
EN ISO 3746 and EN ISO 11202, as appropriate The declaration of noise emissions values shall he made according to EN ISO 4871 with a preference to the dual number form
5.8.4.4 The minimum information to be provided concerning the measurement of airborne noise emissions is the following:
When documenting machine data, it is essential to include the manufacturer's name and address, the year of construction, the series or type designation, and the serial or prototype number of the press being tested Additionally, the nominal force and the continuous stroking rate, measured in strokes per minute, should be specified, including both minimum and maximum values if the speed range is variable.
During measurement, the operating conditions include the speed in strokes per minute, stroke length, and installation and mounting conditions Additionally, it is essential to consider the force applied in kilonewtons, tooling details, and the type and thickness of the material used Alternatively, test conditions under no load can be applied, replacing the need for force, tooling, and material specifications.
measurement: n) location of the press under test, with respect to the reflecting plane (see G.2), o) measurement procedure (see G.5), p) measurement positions (see G.6), q) measurement time (see G.7);
The results include the background sound pressure levels, the necessary correction factors, the equivalent continuous A-weighted sound pressure level at the operator's position, the peak C-weighted instantaneous sound pressure level at the operator's position, and the sound power emitted when the equivalent continuous A-weighted sound pressure level exceeds a specified threshold.
For large presses exceeding 10,000 kN, it is more effective to indicate the equivalent continuous sound pressure levels at designated positions around the press rather than the sound power level.
5.8.4.5 Information on the conditions for noise measurement of mechanical presses is given in Annex G.
Hazards generated by vibration
The design of the press shall be such that vibration which can cause injury shall be avoided, e.g by isolation of the press from the floor foundations according to EN 1299.
Hazards generated by materials and substances
5.8.6.1 Hazardous substances shall not be used wherever possible in the construction of the press, and the use of materials which can cause injury or damage to health shall be eliminated (e.g asbestos)
5.8.6.2 Asbestos linings for clutch and brake shall not be used
5.8.6.3 Adequate means shall be provided to prevent the formation of aerosols and respirable oil mists in unhealthy concentration, e.g from oil used to lubricate pneumatic systems
5.8.6.4 If it is known that hazardous substances are intended to be processed by the user, e.g hard metal powder, the safeguarding systems shall be designed to minimize operator exposure and to accept, if necessary, exhaust ventilation according to EN 626-1
5.8.6.5 Design measures for exhaust ventilation and dust collection equipment shall include features to minimize the risk from fire and explosion according to EN 1127-1.
Hazards generated by neglecting ergonomic principles
5.8.7.1 The press and its controls shall be designed to provide a good work posture which is not fatiguing
5.8.7.2 The positioning, labelling and illumination (if necessary) of control devices, and facilities for materials and tool set handling shall be in accordance with ergonomic principles
5.8.7.3 Where necessary on the press, work stations and the zones in which control devices, guards and protective devices are located shall be lit sufficiently to ensure that all work equipment and materials can be properly seen, and that eye strain is also avoided
5.8.7.4 Parts of the press which weigh more than 25 kg and require to be lifted with a lifting device shall include necessary attachments to accommodate the fitting of a lifting device according to EN 1005-2
5.8.7.5 Tanks containing hydraulic fluid shall be placed or oriented in such a way that the filler and drain pipes can be easily reached
5.8.7.6 Further guidance is given in EN 60204-1, EN 614-1, EN 894-2 and EN 894-3 (See also Bibliography)
The EN 692:2005+A1 standard outlines the essential requirements for operator safeguarding of tools across various operational modes Specifically, for single cycle production with manual removal, it emphasizes the importance of an effective operator safety system and the proper initiation of cycles to ensure safety during operation.
The clutch and brake control system includes features such as overrun monitoring, muting, and a single stroke function It is essential to refer to the relevant sections for specific details on valve tools and safety guards, including the enclosing guard and locking guard requirements.
R & M must ensure that there is no mechanical interference with the interlocking guard Early opening of gates should not occur without the guard being locked For further details, refer to remark 1 and section 5.3.11 Additionally, consult section 3.25.6 of EN 12100-1:2003 and section 5.3.2 of ISO 12100-2:2003 regarding interlocking guards.
R & MR & MYesMR & MEither use of required safet (see 5.3.15) or guard locking effective during the danger movement of the tools (see (continued)
692:2005+A1:2009 (E) Table 2 (continued) Operator safety system (see note 1)Cycle initiation
The clutch and brake control system includes features such as overrun monitoring and muting, along with a single stroke function It is important to note the specifications regarding the El Valve ol guard, which operates without guard locking For further details, refer to sections 3.25.6 of EN 12100-1:2003 and 5.3.2 of ISO 12100-2:2003 The use of AOPD is applicable, but additional remarks should be considered.
The article emphasizes the importance of using required safety measures as outlined in section 5.3.15 It specifies that when there is a significant gap between tools, a separate stroke device must be provided, as stated in section 5.3.13g Additionally, it mentions the necessity of employing both one-hand and two-hand control devices for enhanced safety.
R & MR & MYes (each S & M)MR & MSee 5.3.14 Use of required distance (see 5.3.15) to-run control device and slow ing speed Hold-to-run control device
SS- - - 1 Principally for tool setting 5.5) 2 Maximum closing speed: 3 Where this speed is adj above 10 mm/s, the manuf shall provide safety devices appropriate for all closing (continued)
EN 692:2005+A1: Table 2 (concluded) Operator safety system (see note 1)Cycle initiation
The clutch and brake control system includes features such as overrun monitoring and a muting single stroke function Important abbreviations include "El" for electrical, "M" for monitoring, "R" for redundancy, and "S" for single system, with specific references for tool setting and control system objectives Additionally, an interlocking device may be implemented, activated by the return signal of the clutch in a non-repeat position.
692:2005+A1:2009 (E) able 3 — Requirements for the operator safeguarding of tools for different modes of operation - Mode of production: automatic cycle, manual feed or Operator safety system (see note 1)Cycle initiation
The clutch and brake control system includes features such as overrun monitoring and a muting single stroke function It is essential to adhere to safety protocols, including the use of an enclosing guard to prevent hand entry during production The guard must be locked securely, and any tools used should comply with specified standards For detailed guidelines, refer to sections 5.3.9 and 5.3.10.
R & M must ensure that there is no mechanical interference, as outlined in Annex A Additionally, early opening gates should be implemented For large presses, if they are in a closed position, a special reset zone (S & M) must be utilized to avoid danger.
EN 692:2005+A1: Table 3 (concluded) Operator safety system (see note 1)Cycle initiation
Clutch & brake control system (see note 2) Overrun monitoring MutingSingle stroke function Remarks El.Valve PE using the AOPDAny other than the guard itself
The article discusses the use of required safety distances and outlines various abbreviations and their meanings, such as "El" for electrical, "M" for monitoring, "R" for redundancy, and "S" for single system It also references specific sections for tool-setting and the objectives of the control system.
692:2005+A1:2009 (E) 4 — Requirements for the operator safeguarding of tools for different modes of operation - Mode of production: automatic cycle, solely automat removal Operator safety system (see note 1)Cycle initiation
The clutch and brake control system includes features such as overrun monitoring, muting, and a single stroke function Important components include the valve and tools specified in section 5.3.9 for enclosing guards, as well as section 5.3.10 for locking guards with guard locking mechanisms Additionally, any components other than the guard itself are also relevant to the system's functionality.
R & M must ensure that there is no mechanical interference, as outlined in annex A Early opening of gates is crucial, and for large presses, special reset zones (S & M) should be utilized if they are in the danger zone with the gates closed Additionally, a locking guard must be used, ensuring that no one can access the area other than the guard itself.
R & MS- - - See 5.3.11 If on large presses it is pos in the danger zone with gu use special reset outside (S & M) (continued)
EN 692:2005+A1: Table 4 (continued) Operator safety system (see note 1)Cycle initiation
Clutch & brake control system (see note2) Overrun monitoring MutingSingle stroke function Remarks El.Valve ly opening interlocking guard Any other than the guard itself
To ensure safety during dangerous movements, it is essential to implement either the required safety distance or effective guarding measures In the case of large presses, special reset zones should be utilized when the danger zone is closed Additionally, the use of Active Optoelectronic Protective Devices (AOPD) is recommended, apart from relying solely on the guard itself.
R & MR & M- - - See 5.3.13 Use of required safety distan 5.3.15) (continued)
692:2005+A1:2009 (E) Table 4 (concluded) Operator safety system (see note 1)Cycle initiation
The clutch and brake control system includes features such as overrun monitoring and a muting single stroke function Key abbreviations include El for electrical, M for monitoring, R for redundancy, and S for single system Additionally, "1" refers to tool-setting, while "2" points to the objectives of the control system For further details, refer to sections 3.1.17, 3.1.23, 5.4.1.2, and 5.5.
6 Verification of the safety requirements and/or measures
Table 5 indicates the method(s) by which the safety requirements and measures described in Clause 5 shall be verified, together with a reference to the corresponding sub-clauses in this standard
Table 5 — Means of verification of the safety requirements and/or measures
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Calculations Technical data (see note 4)
5.2.1.2 a) Compression springs in the brake X X X
Compression springs in the clutch X X X
5.2.2 and B.2 PRESSES WITH PART REVOLUTION CLUTCHES
5.2.2.3 Accumulation and dispersal of debris X X X
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Drawings/ Calculations Technical data (see note 4)
5.2.2.5 Sharp edges and rough surfaces X X X
Action of switches in closed position X X X
A.3 Automatic cycle: switches in series X X X
5.2.3 HYDRAULIC AND PNEUMATIC SYSTEMS - COMMON FEATURES
Low pressure cut-off arrangements X X X
5.2.3.10 Inlet port and exhaust ports X X X
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Calculations Technical data (see note 4)
5.2.6 SLIDE ADJUSTMENT AND STROKE ADJUSTMENT
5.3 MECHANICAL HAZARDS IN THE TOOLS AREA
5.3.2 Safeguarding of part revolution clutch presses
5.3.3 Protection of all exposed persons X X
5.3.11 Interlocking guards , control guard, early opening guard
5.3.12 Interlocking guard as control guards X X X X
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Drawings/ Calculations Technical data (see note 4)
5.3.13 g ii) Stroke length: 600 mm and/or table depth:
5.3.13 g vi) Cycle initiation by one AOPD only X X
5.3.14 b) One device for each operator X X X
5.3.18 Prevention of gravity fall during maintenance or repair
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Calculations Technical data (see note 4)
5.3.19.4 a) Hold-to-run control device and slow speed X X X X
5.4 THE CONTROL AND MONITORING SYSTEM
5.4.1.4 Fail-safe condition, redundant and monitored functions
5.4.2 Part revolution clutch presses: redundancy and monitoring
Redundancy and monitoring of clutch/brake control systems
5.4.2.3 d) Sensors integral to the valves X X
5.4.2.3 e) Dynamic monitoring of the valves X X X
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Drawings/ Calculations Technical data (see note 4)
5.4.2.9 a) Limit switches and cam securing X X
5.4.2.9 b) Marking of limit switches and cam position X X
5.4.2.9 d) No damage due to reverse rotation X X X X
5.4.3.1 a) Provision against un-authorized adjustment X X X
5.4.4 Programmable systems and safety related functions
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Calculations Technical data (see note 4)
5.4.5.3 Closed tools/fixed enclosing guards X X X
5.4.5.4 Two-hand control devices selected X X X
5.4.8.2 Stopping of all dangerous movements X X X
Manual override: captive lid or cover X X
5.5 Tool-setting, trial strokes, maintenance, lubrication
5.5.2 Movement of the slide with guards and protective devices operational according to 5.3.2
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Drawings/ Calculations Technical data (see note 4)
5.5.2 b) Slow speed and hold-to-run control device X X X
5.5.5 a) Prevention of clutch re-engagement X X X
5.5.6 Control devices on accessible sides X X X
5.5.9 Two-hand control devices of type II X X X
5.5.10 Hold-to-run control device and inching device X X X
5.5.11 Inching movement limitation: time control or distance control
5.5.12 Control devices for tool-setting X X X
5.6.1 Drive and transmission machinery, and ancillary devices
Sub-clause Safety requirements and/or measures
Performance check/test (see note 2)
Calculations Technical data (see note 4)
5.6.1 c) Interlocking guards with guard locking X X X X
5.6.3 Control system for interlocking of category 1 X X X
5.7.1 Guard rails and toe-boards X X X X
5.8.3 High pressure fluid ejection hazards X X
5.8.6 Hazards generated by materials and substances X X X X