Bsi bs en 01870 14 2007 + a2 2012

30149903 pdf BRITISH STANDARD BS EN 1870 14 2007 Safety of woodworking machines — Circular sawing machines — Part 14 Vertical panel sawing machines ICS 79 120 10 +A2 2012 National foreword This Britis[.]

General

The machine shall comply with the safety requirements and / or protective measures of Clause 5

The machine must be designed in accordance with the principles outlined in #EN ISO 12100:2010$ to address relevant but not significant hazards, such as sharp edges on the machine frame, which are not covered by this document.

NOTE 2 For guidance in connection with risk reduction by design see #EN ISO 12100:2010, 6.2$ and for safeguarding measures see #EN ISO 12100:2010, 6.3$.

Controls

Safety and reliability of control systems

The safety-related parts of a control system encompass the components from the initial actuator or position detector to the power control element of the final machine actuator, such as a motor or brake These components must meet the performance level (PL) requirements specified in EN ISO 13849-1:2008 for various functions, including starting and restarting (PL = c), preventing unexpected startup (PL = c), normal stopping (PL = c), emergency stop (PL = c), enabling devices (PL = c), hold-to-run control devices (PL = c or PL = b if combined with an enabling device), interlocking of guards (PL = c), interlocking of functions (PL = c), speed changing and indication (PL = b), powered movement of the saw blade and related units (PL = c), monitoring maximum operating speed (PL = c), powered movement of the programmable stop (PL = c), and braking (PL = b or PL = c).

#Where magnetic / proximity switches are used they shall be in accordance with the requirements of 6.2 of

EN 1088:1995+A2:2008 and the related control system shall conform to at least PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and / or circuit diagrams and inspection of the machine

Position of controls

The machine's electrical hand-operated controls, including those for starting, normal stopping, cutting stroke, return stroke (for machines with integrated feed), programmable stop (if available), and tool spindle speed adjustment (if applicable), are located on the front side of the main control panel, which is fixed to the moving beam.

The hand-operated controls for the power-driven saw unit's infeed and outfeed movement must be located on the saw unit or on the front side of the main control panel attached to the moving beam.

An emergency stop control device shall be provided on the front side of the main control panel together with the normal start and stop controls

For machines with integrated feed additional emergency stop control devices shall be provided at each end of the machine frame and on any auxiliary control panel

Verification: By checking the relevant drawings, inspection of the machine, measurement and relevant functional testing of the machine.

Starting

Before starting or restarting of the machine all interlocked guards shall be in place and functional This is achieved by the interlocking arrangements described in 5.3.7

For electrically operated machines the requirements of 9.2.5.2 of EN 60204-1:2006 apply but the exceptions referred to and described in 9.2.4 of EN 60204-1:2006 are not relevant

Start or restart shall only be possible by actuation of the start control device provided for that purpose

The safety aspects of control systems, as outlined in section 5.2.1, must ensure that the following functions achieve at least Performance Level (PL) = c according to EN ISO 13849-1:2008: a) starting or restarting the tool spindle; b) pivoting movement of the saw unit; c) infeed/outfeed movement of the saw unit on machines with hand feed; and d) initiating the cutting cycle on machines with integrated feed.

The control system's safety aspect for cutting cycle movements on machines with integrated feed must meet a minimum performance level of PL = b, as specified by EN ISO 13849-1:2008.

Only one powered integrated feed movement shall be possible at any one time

Power to the machine actuators is cut at the end of the integrated feed or pivoting movement A fail-safe time delay device may be implemented, with the delay corresponding to the maximum duration of the integrated feed movement, adhering to PL = c as per EN ISO 13849-1:2008 standards The time delay can either be fixed or adjustable, with the adjustment mechanism sealed A new initiation is required for any subsequent integrated feed movement.

Starting the saw unit pivoting movement shall only be possible when the saw unit is in its rest position

Verification: By checking the relevant drawings and / or circuit diagrams, inspection of the machine and relevant functional testing of the machine.

Normal stopping

The machine shall be fitted with a normal stop control which, when actuated shall disconnect power from all the machine actuators and actuate the brake (if provided – see 5.3.4)

#NOTE For normal stopping of PDS(SR) (power drive system, safety related) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of EN 61800-5-2:2007.$

The control circuit design must meet the normal stopping sequences outlined in sections 5.2.4.3 and 5.2.4.4 If a time delay device is implemented, it should have a duration that is at least equal to the maximum run-down time Additionally, the time delay can either be fixed or equipped with a sealed adjustment device.

#The safety related part of the control system (see also 5.2.1) for normal stopping shall be at least PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and circuit diagrams, inspection of the machine, and relevant functional testing of the machine

Additional stop controls in PL = b must comply with EN ISO 13849-1:2008 for control systems with electronic components These controls are permitted solely for the following movements: a) the infeed and outfeed movement of the saw blade; b) the feed movement of the saw unit; and c) the pivoting movement of the saw unit.

Verification: By checking the relevant drawings and / or circuit diagrams, inspection of the machine and relevant functional testing of the machine

5.2.4.3 Vertical panel sawing machines with hand feed

If the machine is fitted with a mechanical brake, the stop control required by 5.2.4.1 shall be a category 0 stop in accordance with the requirements of 9.2.2 of EN 60204-1:2006

Machines equipped with an electrical brake must adhere to category 1 stop controls as specified in section 5.2.4.1 and in compliance with EN 60204-1:2006, section 9.2.2 The stopping sequence requires that power to the tool spindle drive motor is cut and the brake is applied, followed by the disconnection of power to the brake actuator once the tool has come to a complete stop, which can be achieved through a fail-safe time delay technique that meets the capacity type requirements of PL = c.

5.2.4.4 Vertical panel sawing machines with integrated feed

The stop control required by 5.2.4.1 shall be a category 1 stop in accordance with the requirements of 9.2.2 of

The EN 60204-1:2006 standard outlines a specific stopping sequence for saw units, which includes several critical steps First, it requires the immediate cessation of any saw unit movement, followed by retracting the saw blade to its resting position and cutting power to the tool spindle drive motor while engaging the brake if available Next, power should be cut to other machine actuators, such as a programmable stop if present Finally, after the tool has come to a complete stop, power to the brake actuator should be disconnected, potentially using a time delay or fail-safe technique that meets the capacity type requirements conforming to PL = c.

Verification: By checking the relevant drawing and / or circuit diagrams, inspection of the machine and relevant functional testing of the machine.

Emergency stop

The requirements of #EN ISO 13850:2008$ apply and in addition:

#NOTE For emergency stop of PDS(SR) (power drive system, safety related) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of EN 61800-5-2:2007.$

The machine must be equipped with emergency stop controls that comply with the specifications outlined in section 5.2.2 When activated, these controls will cut off power to all machine actuators and engage the brake, if one is included as per section 5.3.4.

The stopping sequences outlined in sections 5.2.4.3 and 5.2.4.4 must be implemented at the control circuit level When utilizing a time delay device, it is essential that the delay is no less than the maximum run-down time Additionally, the time delay should either be fixed or have its adjustment mechanism sealed.

#The safety related part of the control circuits (see also 5.2.1) for the emergency stop shall be at least

PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

In addition to the requirements of 5.2.5.1 the following requirements apply:

If a machine is equipped with a spring-operated mechanical brake, the emergency stop control must comply with category 0 stop requirements as outlined in EN ISO 13850:2008 and EN 60204-1:2006 Notably, section 10.7.4 of EN 60204-1:2006 is not applicable Additionally, the emergency stop control device must be of a self-latching type at all times.

The emergency stop control circuit shall conform to category 0 in accordance with the requirements in 9.2.5.4 of EN 60204-1:2006

If a machine is equipped with any type of brake, such as an electrical brake, the emergency stop control must comply with category 1 stop requirements as specified in EN ISO 13850:2008 and EN 60204-1:2006 Additionally, the emergency stop control circuit should adhere to category 1 standards outlined in EN 60204-1:2006.

The emergency stop control shall be a category 1 stop in accordance with the requirements in 4.1.4 of

#EN ISO 13850:2008$ and in accordance with the requirements in 10.7 of EN 60204-1:2006 The emergency stop control device shall be at any time of self latching type

The emergency stop control circuit shall conform to category 1 in accordance with the requirements of 9.2.5.4 of EN 60204-1:2006

Cutting cycle on vertical panel sawing machines with integrated feed

The cutting cycle on machines with integrated feed can only commence when the saw blade drive motor operates at the full selected speed, which may be achieved through a time delay device that meets the capacity type conforming to PL = c, in compliance with EN ISO 13849-1:2008 standards.

The cutting cycle sequence for a single cut involves several key steps: First, for vertical cuts, the moving beam is locked in a vertical position, while for horizontal cuts, the saw unit is secured in a horizontal position on the moving beam Next, the saw unit transitions from its rest position to the cutting position During the cutting process, the saw unit (for vertical cuts) or the moving beam (for horizontal cuts) performs the cut until it reaches the end of the workpiece support or the workpiece itself, utilizing a self-closing saw blade guard for position detection After cutting, the tool returns to its rest position, with the return stroke initiated either automatically by the machine or manually by the operator, facilitated by a control device that allows selection between these two options.

The maximum speed of the stroke of the saw unit and of the moving beam on which it is mounted shall not exceed 25 m min -1

#The safety related part of the control system for the selecting control device shall be at least PL = b in accordance with the requirements of EN ISO 13849-1:2008

The safety component of the control system for interlocking arrangements and maximum stroke speed must achieve at least Performance Level c, in compliance with EN ISO 13849-1:2008 standards.

Speed changing

Where a machine is designed to operate at more than one main saw spindle speed the selected speed shall be indicated

The safety component of the control system responsible for indicating the selected speed must achieve a minimum performance level of PL = b, in compliance with EN ISO 13849-1:2008 standards.

Verification: By checking relevant drawings and / or circuit diagrams, inspection of the machine and relevant functional testing of the machine.

Failure of the power supply

The restoration of energy supply following an interruption must not automatically restart any machine actuator, as specified in #EN 1037:1995+A1:2008 For electrically driven machine actuators, this is accomplished by implementing under-voltage protection at a specified level, in line with the requirements outlined in paragraphs 1 and 3 of section 7.5 of EN 60204-1:2006.

Failure of the control circuits

The requirements of Clause 6 of #EN 1037:1995+A1:2008$ apply and in addition:

Control circuits must be designed to ensure that any line rupture, such as a broken wire, pipe, or hose, does not compromise safety functions In accordance with EN 60204-1:2006 and EN ISO 4414:2010, this design prevents involuntary activation of dangerous movements, including saw blade rotation, saw unit movement, or moving beam movement.

For requirements for the control circuits see 5.2.1

Verification: By checking the relevant drawings and / or circuit diagrams, inspection of the machine and relevant functional testing on the machine.

Protection against mechanical hazards

Stability

The machine must include provisions for secure attachment to a stable structure, such as the floor, which may consist of fixing holes or appropriate fixing devices integrated into the machine frame.

Verification: By checking the relevant drawings and inspection of the machine.

Hazard resulting from break-up during operation

To prevent operational hazards from tool breakage, it is essential that the guards are made from materials with specific properties: a) steel must have a minimum ultimate breaking strength of 350 N/mm² and a wall thickness of at least 1.5 mm; b) light alloys should meet the specifications outlined in Table 2.

Table 2 — Characteristics of light alloy tool guards

Polycarbonate should have a minimum wall thickness of 3 mm, or alternatively, other plastic materials that meet the criteria outlined in Annex A Additionally, cast iron must possess an ultimate tensile strength of at least 200 N/mm² and a wall thickness of no less than 5 mm.

#Verification: By checking the relevant drawings, tensile strength, performing the test in Annex A, for plastic materials other than polycarbonate and inspection of the machine.$

NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful.

Tool holder and tool design

Saw spindles shall be manufactured in accordance with the tolerances given in #Annex B$

For machines designed to utilize grooving tools, it is essential that any fitted tools comply with specified requirements.

#EN 847-1:2005+A1:2007$ and shall be a tool for hand fed machines in accordance with 6.2.1 of

The EN 847-1:2005+A1:2007 standard specifies that the maximum cutting width of the tool must not exceed 20 mm Additionally, it requires the inclusion of a device to adjust and maintain the depth of the groove during machining, such as ball ring guides.

Verification: By checking the relevant drawings, measurement and inspection of the machine

To ensure safe tool changes, a spindle holding or blocking device must be utilized, such as a double spanner arrangement or an integral locking bar inserted through the spindle This blocking device is essential for preventing spindle rotation and must remain undamaged after the spindle drive motor is activated while the device is in place.

Verification: By checking the relevant drawings, inspection of the machine and relevant functional testing of the machine

For the fixing of the saw blade(s) saw flanges shall be provided The diameter of the flanges shall be at least

The diameter of the largest saw blade designed for the machine is denoted as D/4 When two flanges are used, their outside diameters must maintain a tolerance of ± 1 mm Additionally, the clamping surface should have a minimum width of 3 mm and be recessed towards the center.

To prevent the tool from loosening during startup, operation, rundown, or braking, it is essential to implement precautions such as establishing a secure connection between the spindle and the tool or ensuring a firm attachment between the front saw flange and the saw spindle.

Verification: By checking the relevant drawings, measurement, inspection of the machine and relevant functional testing of the machine.

Braking

An automatic brake shall be provided for the tool spindle where the un-braked run-down time exceeds 10 s The braked run-down time shall be less than 10 s

#A PLr of at least c for the braking function shall be achieved

The braking torque shall not be applied directly to the tool itself or the saw blade flanges

In cases where a spring-operated mechanical brake or any non-electronic brake is installed, the stipulations outlined in the final paragraph of section 9.3.4 of EN 60204-1:2006 are not applicable It is essential to specify the minimum lifespan of the friction coating and the procedure for its replacement, as referenced in section 6.3.

For electrical braking, reverse current injection braking shall not be used

In cases where an electrical braking system with electronic components is utilized, the braking control system must achieve a minimum Performance Level (PL) of b Additionally, it should be designed in compliance with the requirements outlined in category 2 of EN ISO 13849-1:2008, with the exception of the test rate requirement specified in section 4.5.4.

The EN ISO 13849-1:2008 standard is not applicable; however, the safety-related component of the braking control system must undergo periodic testing, such as monitoring the braked run-down time Feedback for this testing can be obtained from the encoder attached to the spindle motor or by measuring the residual current in the motor's power wires.

1) be independent from the basic control system for braking or an internal watch dog shall be provided in the control system for breaking;

2) be independent from the intention of the operator;

3) be performed at each spindle stop.$

A negative test shall be indicated Where the test result is negative more than three times in sequence it shall not be possible to operate the machine (see also 6.1)

#The diagnostic coverage (DCavg) shall be ≥ 60%

NOTE 1 See Annex E of EN ISO 13849-1:2008 for DC estimation.$

A simple electronic brake, utilizing basic electronic components such as rectifiers, transistors, triacs, diodes, resistors, and thyristors, can be classified as PL = b and designed in category 1, provided it meets the requirements of EN ISO 13849-1:2008 This classification is valid if the mean time to a dangerous failure (MTTFd) reaches a "high" value of at least 30 years, as specified in Table 5 of the standard.

NOTE 2 Complex electronic components like e.g microprocessors or PLCs cannot be considered as well tried under the scope of EN ISO 13849-1:2008 and do therefore not fulfil the requirements of category 1.$

To calculate the probability of a dangerous failure for a simple electronic brake component lacking fault detection and testing capabilities, one should follow the procedure outlined in Annex D.

EN ISO 13849-1:2008 can be used.$

Verification involves examining the relevant drawings and circuit diagrams, as well as inspecting the machine To determine the un-braked and, if applicable, the braked run-down time, refer to the tests outlined in Annex E.

Devices to minimise the possibility or the effect of ejection

Vertical panel saws shall be supplied with a riving knife

The riving knife and its mounting must meet specific criteria: it should be retractable under manual control for cuts that do not begin at the edge of the workpiece and automatically held in the retracted position Additionally, when the saw blade returns to its rest position, the riving knife must automatically revert to its normal operating position.

Verification involves reviewing the relevant drawings, inspecting the machine, and conducting functional tests The machine must be constructed from steel with a minimum tensile strength of 580 N/mm² or a comparable material, featuring flat sides within 0.1 mm over 100 mm Additionally, its thickness should be less than the kerf width and at least 0.2 mm greater than the saw blade plate.

Verification: By checking the relevant drawings, measurement of kerf width, thickness, flatness

NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful

B width of saw blade cut (kerf) b saw blade thickness

The riving knife must have a chamfered leading edge for easier insertion and maintain a constant thickness of ± 0.05 mm along its entire working length, as illustrated in Figure 3, which relates the riving knife thickness to saw blade dimensions.

Verification involves examining the appropriate drawings, inspecting the machine, and taking measurements The riving knife must be adjustable to ensure its tip is positioned between the root of the saw teeth and no more than 2 mm below the edge of the saw blade, in accordance with the specifications outlined in this document (refer to Figure 4 a)).

Verification: By checking the relevant drawings, inspection of the machine and measurement

1 riving knife tip adjustment area a) Riving knife tip adjustment

2 measuring point b) Riving knife mounting dimensions

The riving knife must be designed to maintain a distance of 3 mm from the saw blade when properly mounted and adjusted Additionally, the gap between the saw blade and the riving knife should not exceed 8 mm, measured radially through the center of the saw spindle.

Verification involves examining the appropriate drawings, inspecting the machine, and taking measurements Additionally, the riving knife fixing arrangement must ensure that the riving knife is positioned within the width of the saw blade cut (kerf).

Verification involves examining the relevant drawings, inspecting the machine, and taking measurements The installation of the riving knife must ensure stability that meets the requirements specified in Annex C, or it must fulfill the following condition.

D max where X = Y ± 0,5 Y where D max is the maximum saw blade diameter for which the riving knife can be used;

X and Y shall be measured midway along the riving knife fixing slot in the fixing area (see Figure 4 b))

The fixing plates dimension shall not be less than 2 mm that of the riving knife in the fixing area

Verification: By checking the relevant drawings and measurements or carrying out the test in accordance with

The riving knife must meet the lateral stability test specified in Annex D and should be secured in place by guiding elements, such as guiding pins Additionally, the fixing slot for the riving knife should not exceed 0.5 mm in width compared to the guiding elements.

Verification: By checking the relevant drawings, inspection of the machine and measurement.

Work piece supports and guides

When the panel is placed on the machine, it shall be stable In order to achieve this, the minimum angle between the workpiece support and the vertical shall be 5°

To ensure the stability of the workpiece during operation, it is essential to implement measures at the base of the support that prevent the panel from slipping off the machine This can be achieved by incorporating elements that extend at least 5 mm beyond the workpiece support.

In areas with rollers, it is essential to fill the gaps between them, except where the saw unit needs to pass beneath the roller level.

Verification: By checking the relevant drawings and inspection of the machine

The supporting structure behind the panel that can be contacted by the saw blade must be constructed from wood, wood-based materials like chipboard, fiberboard, plywood, or from plastic or light alloys.

Verification: By checking the relevant drawings and inspection of the machine

When equipping a machine with a middle support device for cutting small workpieces, it must meet specific requirements: a) the device should be hinged to the frame, allowing it to pivot easily between a rest position behind the workpiece support and a working position in front; b) it must be mechanically locked in the working position, with the return to rest only possible after releasing the lock; c) any supporting structure that may contact the saw blade should be made of materials like wood, wood-based products, plastic, or light alloys; d) measures must be in place to prevent the device from accidentally falling into the working position, such as a locking mechanism or a design that utilizes gravity to maintain its rest position.

Verification: By checking the relevant drawings, inspection of the machine, measurement and relevant functional testing of the machine

Machines equipped with an angle cutting device must meet specific requirements: the frame should have end stops for proper positioning of the adjustable workpiece support; the device must be securely attached to the machine frame, such as through screws; any supporting structure that may contact the saw blade should be made of materials like wood, chipboard, fibreboard, plywood, plastic, or light alloy; the workpiece support must be adjustable from 0° to 45° relative to the horizontal cutting line; it should be possible to lock the support in the desired angle; and the device must include a clearly legible scale for indicating the adjusted angle, ideally designed for easy reading, possibly with a magnifying glass.

Machines equipped with a programmable stop must adhere to specific requirements: a) the stop movement's maximum speed must not exceed 25 m/min; b) any workpiece support structure that may come into contact with the saw blade should be constructed from wood, wood-based materials (like chipboard, fiberboard, or plywood), plastic, or light alloys; c) it is essential to prevent crushing and shearing hazards between the stop and the machine's fixed components, such as the frame.

The control system for programmable stop movements can be managed using a hold-to-run control device, achieving a performance level (PL) of c as per EN ISO 13849-1:2008 standards Alternatively, if paired with an enabling device that meets PL = c requirements, the control circuit may operate at a performance level of b in accordance with the same standards.

EN ISO 13849-1:2008, the control system for the movement itself can be PL = b in accordance with the requirements of EN ISO 13849-1:2008; or$

 by limiting the maximum force at the shearing or crushing point to 50 N maximum

#The safety related part of control system (see also 5.2.1) for the monitoring the operating speed shall be at least PL = b in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and / or circuit diagrams, measurement, inspection of the machine and relevant functional testing of the machine.

Prevention of access to moving parts

5.3.7.1 Safeguarding of the rear frame

To ensure safety, access to moving parts such as the rotating tool and powered movements of the saw unit must be restricted by filling in the rear frame of the machine Additionally, any gaps in the rear guarding system should comply with the safety distances outlined in section 14.2.4.1 of EN ISO 13857:2008.

When the filling material can be reached by the saw blade, it must consist of wood or wood-based materials, including chipboard, fiberboard, plywood, or lightweight alloys.

To ensure safety during cutting operations, access to the saw blade must be restricted using a combination of a fixed guard and a self-closing movable guard (pressure shoe) that covers the blade when not in use Fixed guards intended for user removal for maintenance should be equipped with unlosable screws Additionally, when the saw unit is at rest, the self-closing movable guard must be securely locked to prevent any access to the saw blade.

The design of the slot for the saw blade in the sliding surface of the self-closing movable guard must adhere to the safety distance requirements outlined in section 14.2.4.1 of EN ISO 13857:2008, ensuring safe operation during cutting tasks.

The sliding surface of the pressure shoe or its lining material should be made of plastic, such as polypropylene, polyamide, or polyethylene, or other similar plastics, as well as light alloys.

The necessary openings for the tool spindle(s) and spindle nut(s) must be limited to a maximum clearance of 4 mm, including the adjustment of the riving knife in the self-closing movable guard.

For maintenance and servicing that require access to the tool, the guarding system must include a movable guard This guard should be interlocked with the tool spindle drive motor, and in machines with integrated feed, it should also be connected to the drive motor of the saw unit and the moving beam.

1 fixed guard preventing access to the saw blade

2 self closing moveable guard (pressure shoe)

4 slot for the saw blade

Figure 5 — Example of saw blade guarding system - Pressure shoe preventing access to saw blade

For machines equipped with grooving tools, the self-closing movable guard (pressure shoe) in the tool guarding system must be replaceable with an additional pressure shoe to ensure that access to the mounted grooving tool is restricted.

The pressure shoe must meet specific criteria: a) when the grooving tool unit is at rest, the pressure shoe should be securely locked to ensure that the grooving tool does not extend beyond the sliding surface, maintaining a minimum distance of 15 mm from the tool's maximum diameter; b) during operation at maximum grooving depth, the pressure shoe must not retract more than 6 mm from the workpiece surface, and it should not be possible to lock the pressure shoe while in motion.

The maximum grooving depth is restricted by a limiting device, such as a disk attached to the grooving tool Additionally, the slot on the sliding surface of the pressure shoe must be constrained to ensure proper functionality.

1) its length A (see Figure 6) does not exceed more than 4 mm the maximum length of the grooving tool with maximum diameter for which the machine is designed, which projects the sliding surface of the pressure shoe when grooving with maximum depth;

2) its width C (see Figure 6) does not exceed more than 4 mm the maximum width of the limitation disk together with the grooving tool with the maximum width for which the machine is designed

#The safety related part of the control system (see also 5.2.1) for interlocking shall be at least PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and / or circuit diagrams, measurement, inspection of the machine and relevant functional testing of the machine

A length of the slot in the sliding surface for grooving tools

C width of the slot in the sliding surface for grooving tools

Figure 6 — Example of grooving tool guarding system — Pressure shoe preventing access to grooving tool

5.3.7.3 Crushing/shearing hazards between power operated moving saw unit and fixed parts of the machines

To prevent crushing and shearing hazards during the power-operated movement of the saw unit, it is essential to initiate movement using a control device, such as a push button This control system must meet safety standards, specifically conforming to Performance Level c (PL = c) as outlined in EN ISO 13849-1:2008.

If the machine is fitted with a powered feed movement a dedicated control device for initiating the cutting cycle shall be provided (see 5.2.3 and 5.2.6)

Guarding of drives

To ensure safety, access to the drive mechanism, including tool spindles and moving beams, must be restricted by either a fixed guard or a movable guard that is interlocked with the corresponding drive motor Additionally, fixed guards that users need to remove for maintenance or cleaning should be equipped with un-losable screws.

#The safety related part of the control system (see also 5.2.1) for interlocking function shall be at least

Protection against non-mechanical hazards

Fire

To minimise risk of fire, the requirements of 5.4.3 and 5.4.4 shall be met

Sparks as result of contact between the tool and fixed machine parts shall be avoided in accordance with the requirements of 5.3.6, 5.3.7.1 and 5.3.7.2

Noise

5.4.2.1 Noise reduction at the design stage

When designing machinery the information and technical measures to control noise at source given in

#EN ISO 11688-1:2009$ shall be taken into account Also the information given in EN ISO 11688-2:2001 may be taken into account

The most relevant noise source is the rotating tool

The operating conditions for noise measurement shall comply with Annex P of ISO 7960:1995

Mounting and operating conditions of the machine shall be identical for the determination of emission sound pressure levels at the work station and sound power levels

For machines where Annex P of ISO 7960:1995 is not applicable, e.g for different spindle speeds and saw blade diameters, the detailed operating conditions used shall be given in the test report

The emission sound power levels of vertical panel sawing machines must be measured using the enveloping surface measuring method specified in #EN ISO 3746:2010$, with specific modifications Firstly, the environmental indicator K 2A should not exceed 4 dB Secondly, the difference between the background sound pressure level and the machine sound pressure level at each measuring point must be at least 6 dB.

According to EN ISO 3746:2010, specifically in section 8.3.3, Formula (12), the measurement surface must be a parallelepiped located 1.0 m from the reference surface Additionally, if the distance between the machine and any auxiliary unit is less than 2.0 m, that auxiliary unit must be included in the reference surface.

#deleted text$ e) the accuracy of the test method shall be better than 3 dB; f) the number of microphone positions shall be 9 in accordance with Annex P of ISO 7960:1995

Alternatively, where the facilities exist and the measurement method applies to the machine emission sound power levels may also be measured in accordance with a method with higher precision i.e

#EN ISO 3743-1:2010$, #EN ISO 3743-2:2009$, #EN ISO 3744:2010$ and

#EN ISO 3745:2009$ without the preceding modifications

For determination of the emission sound power level by sound intensity method, use

#EN ISO 9614-1:2009$ (subject to agreement between the supplier and the purchaser)

Emission sound pressure levels at the workstation shall be measured in accordance with

#EN ISO 11202:2010$ with the following modifications:

1) the environmental indicator K 2A and the local environmental correction K 3A shall be equal to or less than 4 dB;

2) the difference between the background emission sound pressure level and the workstation sound pressure level shall be equal to or greater than 6 dB #according to EN ISO 11202:2010, 6.4.1, accuracy grade 2 (Engineering)$;

3) the local environmental correction K 3A shall be calculated in accordance with A.2 of

#EN ISO 11204:2010$ with the reference restricted to #EN ISO 3746:2010$ instead of the method given in #EN ISO 11202:2010$, or in accordance with #EN ISO 3743-1:2010$,,

#EN ISO 3743-2:2009$, #EN ISO 3744:2010$ or #EN ISO 3745:2009$ where one of these standards has been used as the measuring method

The declaration of noise emission shall be in accordance with 6.3 s).

Emission of chips and dust

The machine's tool guarding system and frame must incorporate capture devices designed for chips and dust, equipped with outlets for connecting to a chip and dust extraction system.

NOTE 1 By placing the capture device close to the emission source the dimension of the opening of the capture device and the air flow rate can be reduced at the same time as the capture efficiency can be improved

The capture device must be engineered to reduce pressure drop and prevent material accumulation by eliminating abrupt changes in the flight direction of extracted chips and dust, as well as avoiding sharp angles and obstacles that could lead to the trapping of these materials.

To ensure efficient operation, the transfer of chips and dust between the capture device and the machine's connection to the extraction system must prioritize minimizing pressure drop and preventing material build-up, particularly in the flexible connections of moving units.

The design of hoods, ducts, and baffles must ensure that chips and dust are effectively conveyed to the collection system, utilizing a conveying velocity for the extracted air within the duct.

#NOTE 2 The pressure drop between the inlet of all capture devices and the connection to the CADES should be maximum 1 500 Pa (for the air conveying velocity of 20 m/s).$

To achieve low dust emissions in machines equipped with a rear side exhaust system for both horizontal and vertical cuts, it is essential to adhere to the features outlined in Table 3.

Table 3 — Low dust emission design

Extraction outlet Minimum diameter of extraction outlet mm

The information on extraction data shall be in accordance with 6.3 m)

Verification: By checking the relevant drawings and inspection of the machine Run the machine

Under the conditions specified in Annex P of ISO 7960:1995, ensure that the machine is disconnected from the chips and dust extraction system Verify the creation of airflow from the capture device inlets to the connection outlets using smoke at the outlets Additionally, measure the pressure drop when the machine is connected to the chips and dust extraction system, maintaining the specified airflow rate as outlined in Annex P of ISO 7960:1995.

#NOTE 4 For measurement of chip and dust extraction system performance two standardised methods are useful: concentration method (EN 1093-9:1998+A1:2008) and index method (EN 1093-11:2001+A1:2008).$

Electricity

#The requirements of EN 60204-1:2006 with the exception of 6.3 apply unless stated otherwise in this document

See 6.2 of EN 60204-1:2006 for the prevention of electric shock due to direct contacts and Clause 7 of

EN 60204-1:2006 for protection against short circuits and overloading.

NOTE 1 The protection of people against electrical shock due to indirect contacts should be normally ensured by automatic isolation of the electrical power supply of the machine by the operation of a protective device installed by the user in the line powering the machine (see the information provided by the manufacturer in the instruction handbook (see 6.3 w)).$

Electrical enclosures must be safeguarded against the ejection of tools and workpieces, ensuring that live parts remain inaccessible as per EN 60204-1:2006, section 6.2.2 Additionally, the risk of fire due to overheating in power circuits is mitigated when they are protected against overcurrent, in accordance with section 7.2.2.

All electrical components and their enclosures must have a minimum protection rating of IP 54, ensuring compliance with established standards.

!In accordance with 18.2 of EN 60204-1:2006 the test 1 for the continuity of the protective bonding circuit and with 18.6 of EN 60204-1:2006 functional tests apply."

Verification involves examining the pertinent drawings and circuit diagrams, inspecting the machine, and conducting relevant tests to ensure the continuity of the protective bonding circuit, as well as performing the functional tests outlined in sections 18.2 and 18.6.

!NOTE 2" For electrical components characteristics the information from the electrical component supplier can be useful.

Ergonomics and handling

The requirements of #EN 614-1:2006+A1:2009$ apply and in addition:

The machine and its controls shall be designed according to ergonomic principles in accordance with

#EN 1005-4:2005+A1:2008$ for work posture which is not fatiguing

For the positioning, labelling and illumination (if necessary) of control devices, and facilities for materials and tool set handling the ergonomic principles of #EN 894-1:1997+A1:2008$, #EN 894-2:1997+A1:2008$,

Vertical panel sawing machines equipped with hand feed must include an operating handle for maneuvering the saw unit during the cutting process, ensuring that the handle is positioned to prevent shearing hazards between the saw and the machine's fixed components.

The vertical panel saws with hand feed must have a counterbalanced saw unit, ensuring that the maximum force needed to adjust the saw unit vertically is 50 N, while transitioning from vertical to horizontal cutting requires a maximum force of 120 N The design of the counterbalancing mechanism must guarantee that a single failure in any component will prevent the saw unit from dropping, rendering the machine inoperable until repairs are made.

If the machine is fitted with a movable control panel, this panel shall be fitted with a facility to move it in the desired position e.g a handle

Machines and components weighing over 25 kg must be equipped with appropriate attachments for lifting devices These attachments, such as lugs, should be strategically positioned to prevent any risk of overturning, falling, or uncontrolled movement during transport, assembly, disassembly, disabling, and scrapping.

Tanks containing compressed air drainers and oilers shall be placed or oriented in such a way that the filler and drain pipes can be easily reached

If graphical symbols related to the operation of actuators are used, they shall be in accordance with

If the machine is equipped with scales the requirements of #EN 894-2:1997+A1:2008$ shall apply

Useful information on ergonomics can also be found in EN 60204-1:2006, #EN 614-1:2006+A1:2009$ and

See also 5.2.2 for position of controls 6.3, #EN 894-3:2000+A1:2008$ and

Verification: By checking the relevant drawings, inspection of the machine, measurement and relevant functional testing of machine.

Pneumatics

For machines fitted with pneumatic equipment the requirements of #EN ISO 4414:2010$ shall apply

Verification: By checking the relevant drawings and / or circuit diagrams and inspection of the machine.

Electromagnetic compatibility

The machine shall have sufficient immunity to electromagnetic disturbances to enable it to operate correctly in accordance with EN 50370-1:2005, 50370-2:2003 and #EN 60439-1:1999 and

Machines that include CE-marked electrical components and are installed according to the manufacturers' guidelines are typically safeguarded against external electromagnetic interference.

Verification: By checking the relevant drawings and / or circuit diagrams and inspection of the machine.

Static electricity

Flexible hoses for chip and dust extraction fitted to the machine shall be able to lead charge to earth potential

Supply disconnection (isolation)

12 Variations in the rotational speed of tools 6.2.2.2, 6.3.3 5.2.7

13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.8

14 Failure of the control circuit 6.2.11, 6.3.5.4 5.2.9

17 Falling or ejected objects or fluids 6.2.3, 6.2.10 5.3.5

18 Loss of stability / overturning of machinery 6.3.2.6 5.3.1

5 Safety requirements and / or measures

The machine shall comply with the safety requirements and / or protective measures of Clause 5.

Maintenance

10.3 External influences on electrical equipment 6.2.11.11 5.2.1, 5.4.7

10.6 Errors made by the operator (due to mismatch of machinery with human characteristics and abilities, see 8.6)

11 Impossibility of stopping the machine in the best possible conditions 6.2.11.1, 6.2.11.3, 6.3.5.2 5.2.4, 5.2.5,

12 Variations in the rotational speed of tools 6.2.2.2, 6.3.3 5.2.7

13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.8

14 Failure of the control circuit 6.2.11, 6.3.5.4 5.2.9

17 Falling or ejected objects or fluids 6.2.3, 6.2.10 5.3.5

18 Loss of stability / overturning of machinery 6.3.2.6 5.3.1

5 Safety requirements and / or measures

The machine shall comply with the safety requirements and / or protective measures of Clause 5

NOTE 1 In addition, the machine should be designed according to the principles of #EN ISO 12100:2010$ for hazards relevant but not significant, which are not dealt with by this document (e.g sharp edges of the machine frame)

NOTE 2 For guidance in connection with risk reduction by design see #EN ISO 12100:2010, 6.2$ and for safeguarding measures see #EN ISO 12100:2010, 6.3$

5.2.1 Safety and reliability of control systems

The safety-related parts of a control system encompass the components from the initial actuator or sensor to the power control element of the final machine actuator, such as a motor or brake These components must meet the performance level (PL) requirements specified in EN ISO 13849-1:2008 for various functions, including starting and restarting, prevention of unexpected startup, normal stopping, emergency stop, enabling devices, hold-to-run control devices, interlocking of guards, interlocking of functions, speed changing and indication, powered movement of the saw blade and unit, monitoring maximum operating speed, powered movement of the programmable stop, and braking Each function is assigned a specific PL, primarily categorized as PL = c or PL = b, ensuring compliance with safety standards.

#Where magnetic / proximity switches are used they shall be in accordance with the requirements of 6.2 of

EN 1088:1995+A2:2008 and the related control system shall conform to at least PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

Verification: By checking the relevant drawings and / or circuit diagrams and inspection of the machine

The machine's electrical hand-operated controls, including those for starting, normal stopping, cutting stroke, return stroke (for machines with integrated feed), programmable stop (if available), and tool spindle speed adjustment (if applicable), must be located on the front side of the main control panel, which is fixed to the moving beam.

The hand-operated controls for the power-driven saw unit's infeed and outfeed movement must be located on the saw unit or on the front side of the main control panel attached to the moving beam.

An emergency stop control device shall be provided on the front side of the main control panel together with the normal start and stop controls

For machines with integrated feed additional emergency stop control devices shall be provided at each end of the machine frame and on any auxiliary control panel

Before starting or restarting of the machine all interlocked guards shall be in place and functional This is achieved by the interlocking arrangements described in 5.3.7

For electrically operated machines the requirements of 9.2.5.2 of EN 60204-1:2006 apply but the exceptions referred to and described in 9.2.4 of EN 60204-1:2006 are not relevant

Start or restart shall only be possible by actuation of the start control device provided for that purpose

The safety aspects of control systems, as outlined in section 5.2.1, must ensure that operations such as starting or restarting the tool spindle, pivoting the saw unit, and managing the infeed/outfeed movements on hand-fed machines meet a minimum performance level of PL = c This requirement aligns with the standards set forth in EN ISO 13849-1:2008.

The control system's safety aspect for cutting cycle movements on machines with integrated feed must meet a minimum performance level of PL = b, as specified by EN ISO 13849-1:2008.

Only one powered integrated feed movement shall be possible at any one time

Power to the machine actuators is cut off at the end of the integrated feed or pivoting movement A fail-safe time delay device may be implemented, with the delay corresponding to the maximum duration of the integrated feed movement, adhering to PL = c as per EN ISO 13849-1:2008 standards The time delay can either be fixed or adjustable, with the adjustment mechanism sealed To initiate another integrated feed movement, a new activation is required.

Starting the saw unit pivoting movement shall only be possible when the saw unit is in its rest position

The machine shall be fitted with a normal stop control which, when actuated shall disconnect power from all the machine actuators and actuate the brake (if provided – see 5.3.4)

#NOTE For normal stopping of PDS(SR) (power drive system, safety related) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of EN 61800-5-2:2007.$

The control circuit design must comply with the normal stopping sequences outlined in sections 5.2.4.3 and 5.2.4.4 If a time delay device is implemented, it should have a duration that is at least equal to the maximum run-down time Additionally, the time delay can either be fixed or equipped with a sealed adjustment device.

#The safety related part of the control system (see also 5.2.1) for normal stopping shall be at least PL = c in accordance with the requirements of EN ISO 13849-1:2008.$

Additional stop controls in PL = b must comply with EN ISO 13849-1:2008 for control systems that include electronic components These controls are permitted solely for the following movements: a) the infeed and outfeed movement of the saw blade; b) the feed movement of the saw unit; and c) the pivoting movement of the saw unit.

If the machine is fitted with a mechanical brake, the stop control required by 5.2.4.1 shall be a category 0 stop in accordance with the requirements of 9.2.2 of EN 60204-1:2006

Machines equipped with an electrical brake must adhere to category 1 stop controls as specified in section 5.2.4.1 and in compliance with EN 60204-1:2006, section 9.2.2 The stopping sequence requires that power to the tool spindle drive motor is cut and the brake is applied, followed by cutting power to the brake actuator only after the tool has come to a complete stop, which can be achieved through a fail-safe time delay technique that meets the performance level PL = c.

The stop control required by 5.2.4.1 shall be a category 1 stop in accordance with the requirements of 9.2.2 of

The EN 60204-1:2006 standard outlines a specific stopping sequence for machinery, which includes several critical steps First, it mandates the immediate cessation of any saw unit's traversing movement, followed by retracting the saw blade to its resting position and cutting power to the tool spindle drive motor while engaging the brake if available Next, power must be cut to other machine actuators, such as a programmable stop if installed Finally, the power to the brake actuator, if it is electrical, should be disconnected only after the tool has come to a complete stop, potentially utilizing a time delay or fail-safe technique that meets the requirements of performance level c (PL = c).

Verification: By checking the relevant drawing and / or circuit diagrams, inspection of the machine and relevant functional testing of the machine

The requirements of #EN ISO 13850:2008$ apply and in addition:

#NOTE For emergency stop of PDS(SR) (power drive system, safety related) see 4.2.2.2 "safe torque off (STO)” and 4.2.2.3 “safe stop 1 (SS1)” of EN 61800-5-2:2007.$

The machine must be equipped with emergency stop controls located as specified in section 5.2.2 When activated, these controls will cut power to all machine actuators and engage the brake, if available, as outlined in section 5.3.4.

The stopping sequences outlined in sections 5.2.4.3 and 5.2.4.4 must be implemented at the control circuit level If a time delay device is utilized, it must have a duration that is at least equal to the maximum run-down time Additionally, the time delay should either be fixed or the adjustment mechanism must be sealed.