#The safety related part of the control systems also see 5.2.1 for start and restart of the machine and for a demountable power feed unit if fitted shall at least be PL=c in accordance w
General
For the purposes of this #document$ the following terms and definitions apply.
Terms
The main parts of the machine and their terminology are illustrated in Figure 1
Key 1 Under table extraction point
10 Saw blade guard exhaust outlet
12 Moveable roller table locking clamp
13 Rip- and cross-cut fence
Definitions
#3.3.1$$$$ circular saw bench/up-cutting cross-cut sawing machine circular sawing machine with a single saw blade #and$ one fixed rotational speed
The saw unit is located beneath the workpiece support table and operates in three distinct modes: a) ripping, where the saw blade is aligned parallel to the fence and the workpiece is fed either manually or with a detachable power feed; b) cross-cutting, with the saw unit positioned at a 90º angle to the fence, utilizing a sliding infeed table for manual feeding; and c) cross-cutting with a manually raised saw unit, allowing for cuts through a stationary workpiece.
The saw unit can be tilted around the horizontal axis of the spindle to create angled cuts on the workpiece Additionally, in cross-cutting modes, the saw unit can be rotated about a vertical axis to achieve beveled cuts.
Figure 2 — Example of a machine in the ripping mode
Figure 3 —Example of a machine in the cross-cutting mode with moved workpiece
Figure 4 — Example of a machine in the cross-cutting mode with stationary workpiece
The infeed table is an essential component of the machine, serving multiple purposes: it acts as a support for the rip fence, aiding in the feeding of workpieces during ripping operations with the circular saw bench; it functions as a sliding table for cross-cutting when the saw blade unit is stationary; and it provides additional fixed support for workpieces when the machine is utilized as an up-cutting cross-cut sawing machine.
#3.3.3$$$$ operator position that area occupied by the operator for use in the bench sawing mode and for use in both cross-cut sawing modes, as shown in Figure 5
4 Operating area for ripping and cross-cutting modes
!displaceable machine" machine which is located on the floor, stationary during use and equipped with a device, normally wheels, which allows it to be moved between locations
#3.3.5$$$$ machine actuator power mechanism used to effect motion of the machine
#3.3.6$$$$ hand feed manual holding and/or manual guiding of the workpiece (or of a machine element incorporating a tool)
#which$ includes the use of a hand operated carriage on which the workpiece is placed manually or clamped, and the use of a demountable power feed unit
NOTE The words in brackets are not applicable to this machine
The demountable power feed unit features a feed mechanism that is designed to be easily moved from its working position without the need for a spanner or any additional tools.
#3.3.8$$$$ ejection unexpected movement of the workpiece or parts of it or part of the machine from the machine during processing
Kickback is a specific type of ejection that refers to the unanticipated movement of a workpiece or its components, as well as parts of the machine, in the opposite direction of the feed during processing.
#3.3.10$$$$ anti-kickback device device which either reduces the possibility of kickback or arrests the motion during kickback of the workpiece or parts of it or parts of the machine
#3.3.11$$$ $ safety appliance additional device which is not an integral part of the machine but which assists the operator in the safe feeding of the workpiece, e.g see Figure 6
#Dimensions in millimetres$ a) — Example of push stick
Figure 6 — Examples of a push stick and push block
#3.3.12$$$$ run-down time time elapsed from the actuation of the stop control up to spindle standstill
Supplier information includes statements, sales literature, leaflets, and other documents where the manufacturer or supplier specifies the characteristics of a material or product, as well as its compliance with relevant standards.
#3.3.14 performance level PL discrete level used to specify the ability of safety-related parts of control systems to perform a safety function under foreseeable conditions
!This clause contains all significant hazards, hazardous situations and events (see
EN ISO 12100:2010 outlines the safety requirements and measures necessary to address significant hazards identified through risk assessment for machines This document provides guidance on eliminating or reducing risks and references relevant standards to ensure safety compliance.
#These hazards are listed in Table 1:$
##Table 1 — List of significant hazards (1 of 3)
No Hazards, hazardous situations and hazardous events EN ISO 12100:2010 Relevant sub- clause of this document
- machine parts or workpieces: a) shape;
5.3.6, 5.3.7 c) mass and stability (potential energy of elements which may move under the effect of gravity)
5.3.6 d) mass and velocity (kinetic energy of elements in controlled or uncontrolled motion);
- accumulation of energy inside the machinery: g) liquids and gases under pressure; 6.2.10, 6.3.5.4 5.4.7, 5.4.8
No Hazards, hazardous situations and hazardous events EN ISO 12100:2010 Relevant sub- clause of this document
1.5 Drawing-in or trapping hazard 5.3.7
1.9 High pressure fluid injection or ejection hazard 5.3.7
2.1 Contact of persons with live parts (direct contact) 6.2.9, 6.3.5.4 5.4.4, 5.4.13,
2.2 Contact of persons with parts which have become live under faulty conditions
4 Hazards generated by noise, resulting in:
4.1 Hearing loss (deafness), other physiological disorders (loss of balance, loss of awareness)
4.2 Interference with speech communication, acoustic signals
7 Hazards generated by materials and substances (and their constituent elements) processed or used by the machinery
7.1 Hazards from contact with or inhalation of harmful fluids and dusts 6.2.3b, 6.2.4 5.4.3
8 Hazards generated by neglecting ergonomic principles in machinery design related to:
8.1 Unhealthy postures or excessive effort 6.2.7, 6.2.8.2, 6.2.11.12,
8.2 Hand-arm or foot-leg anatomy 6.2.8.3 5.2.2
8.7 Design, location or identification of manual controls 6.2.8.7, 6.2.11.8 5.2.2
8.8 Design or location of visual display units 6.2.8.8, 6.4.2 5.2.2
No Hazards, hazardous situations and hazardous events EN ISO 12100:2010 Relevant sub- clause of this document
10 Unexpected start up, unexpected overrun/overspeed (or any similar malfunction) from:
10.1 Failure/disorder of the control system 6.2.11, 6.3.5.4 5.2.1
10.2 Restoration of energy supply after an interruption
10.3 External influences on electrical equipment 6.2.11.11 5.2.1, 5.4.4,
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 5.2.2, 5.2.4
13 Failure of the power supply 6.2.11.1, 6.2.11.4 5.2.5
14 Failure of the control circuit 6.2.11, 6.3.5.4 5.2.1
17 Falling or ejected objects or fluids 6.2.3, 6.2.10 5.3.2, 5.3.3,
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
In addition, the machine should be designed in accordance with the requirements of 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)
For guidance in connection with risk reduction by design, see EN ISO 12100:2010, 6.2, and for safeguarding measures, EN ISO 12100:2010, 6.3.$
Controls
5.2.1 Safety and reliability of control systems
A safety-related control system, as defined by this European Standard, encompasses everything from the initial manual control or position detector to the input point of the final actuator or element, such as a motor.
The safety-related components of the machine's control system must meet specific functions and adhere to the performance level (PL) requirements outlined in EN ISO 13849-1:2008 These functions include starting and restarting, as well as normal stopping, both of which must achieve at least PL=c.
# c) Prevention of automatic restart: PL=c (see 5.2.5);$ d) interlocking#: PL=c$ (see #5.3.7.3, 5.3.7.4$); e) the braking system#: PL=b or PL=c$ (see #5.2.4, 5.3.4$)
#Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine NOTE For components characteristics the information from the component supplier can be useful.$
Protective devices must comply with specific standards The following requirements apply to the listed devices: magnetic and proximity switches should meet the standards set by EN 1088:1995+A2:2008, section 6.3, and the associated control system must achieve at least PL=c compliance.
EN ISO 13849-1:2008; b) time delay shall at least be PL=c in accordance with the requirements of EN ISO 13849-1:2008
Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant functional testing of the machine
NOTE For the component characteristics, confirmation from the components' manufacturers can be useful.$
The start control and the stop control shall be located in the shaded area X of Figure 7
Verification: By checking the relevant drawings, measurement and inspection of the machine
#The requirements of$ 9.2.5.2 of !EN 60204-1:2006"#apply$ and in addition:
The document ensures that all safeguards are operational through the interlocking arrangements outlined in section 5.3.7, while "operation" refers specifically to the rotation of the saw spindle.
The exceptions described in 9.2.5.2 of !EN 60204-1:2006" are not relevant
The safety aspect of control systems for machine start and restart, as well as for any demountable power feed unit (if applicable), must meet a minimum performance level of PL=c, in accordance with established requirements.
Verification: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing of the machine
Machines shall be fitted with a stop control which, when actuated shall disconnect power from all the machine actuators and actuate the brake (if provided)
#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.$
If the machine is fitted with a #spring operated$ mechanical brake this stop control shall be of a category
0 in accordance with the requirements 9.2.2 of !EN 60204-1:2006"
For machines equipped with any type of brake, such as an electrical brake, the stop control must comply with category 1 as specified in section 9.2.2 of EN 60204-1:2006 The stopping sequence should begin by cutting power to the machine actuators and engaging the brake, followed by cutting power to the brake once the stopping sequence is fully completed.
The stopping sequence must be fulfilled at the control systems level If a time delay device is utilized, it must comply with section 5.2.1.2 b), ensuring that the time delay is at least equal to the maximum rundown time The time delay can either be fixed or equipped with a sealed adjustment device.
#The safety related part of the control systems (also see 5.2.1) for normal stopping shall at least be PL=c in accordance with the requirements of EN ISO 13849-1:2008.$
Verification: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing of the machine
5.2.5 Failure of the power supply
To ensure safety in electrically driven machines, automatic restarts following a supply interruption must be prevented, as outlined in paragraphs 1 and 3 of EN 60204-1:2006.
#The safety related part of the control system to prevent automatic restart 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, inspection and relevant functional testing of the machine
Protection against mechanical hazards
Machines shall be equipped with a facility to fix the machine to the floor, e.g by providing fixing holes in the machine frame
The machine rigidity shall be in accordance with the requirements of Annex A
Machines intended to be moved using a crane or hoist shall be equipped with provision for lifting devices, e.g lifting eyes, correctly positioned relative to the machine centre of gravity
#Displaceable$ machines fitted with wheels shall have facilities to make them stable during cutting e.g brakes for the wheels or a device to retract the wheels from the floor
Verification: By checking the relevant drawings, inspection and relevant functional testing of the machine
5.3.2 Risk of break-up during operation
The saw blade guards must be constructed from materials that meet specific criteria: a) steel with a minimum ultimate tensile strength of 350 N/mm² and a wall thickness of at least 1.5 mm; b) a light alloy that complies with the specifications outlined in Table 2.
Table 2 — Light alloy tool guard thickness and tensile strength
300 3 c) #polycarbonate with a wall thickness of at least 3 mm or other plastic material passing the test given in Annex G.$
The saw blade guard beneath the table must be constructed from one or a combination of specified materials, or from cast iron that has a minimum ultimate tensile strength of 200 N/mm² and a wall thickness of at least 3 mm.
Verification: By checking the relevant drawings, measurement !and" inspection on the machine
!deleted text" #and for plastic materials with characteristics other than those of polycarbonate given in c) above by performing the test in Annex G$
!NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful."
5.3.3 Tool holder and tool design
It shall not be possible to mount a saw blade in the machine of a greater diameter than the saw blade for which the machine is designed
Saw spindles shall be manufactured in accordance with the tolerances given in Annex B
Verification: By checking the relevant drawings, inspection, measurement and relevant functional testing of the machine
To facilitate tool changes, a spindle holding device must be used to keep the spindle stationary This device can be a double spanner arrangement or a locking bar that is inserted through the spindle The locking bar should have a minimum diameter of 8 mm and be constructed from steel with a minimum ultimate tensile strength of 350 N/mm².
Locking bars shall prevent the spindle from rotating if the spindle drive motor is inadvertently switched on
Verification involves examining the pertinent drawings, conducting inspection measurements, and performing functional tests on the machine For machines equipped with locking bars, an alternative test can be conducted: after starting the spindle drive motor with the locking bar in position, the spindle should remain stationary.
!NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful."
Saw flanges (or in the case of flush mounted saw blades - a flange) shall be provided
For saw blades with a diameter of 450 mm or less, the diameter of both flanges, or the flange for flush mounting, must be at least one-fourth of the maximum diameter of the saw blade that the machine is designed to accommodate.
For saw blades with a diameter > 450 mm, the diameter of the flanges (or flange for flush mounting) shall be
Flanges designed for applications other than flush mounted saw blades must feature an outer clamping surface that is a minimum of 5 mm wide and recessed towards the center.
Where two flanges are provided, both outside diameters shall be within a limit deviation of ± 1 mm
To prevent the saw blade from loosening during start-up, operation, or braking, it is essential to implement precautions such as establishing a secure connection between the spindle and the saw blade, or ensuring a firm attachment between the front saw flange and the saw spindle.
Verification: By checking the relevant drawings, measurement and inspection of the machine
#An automatic brake shall be provided for the saw spindle with an un-braked run-down time exceeding
The braked run-down time shall be less than 10 s
#A PL of at least c for the braking function shall be achieved
For machines equipped with a spring-operated mechanical brake or any non-electronic brake system, the stipulations 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 outlined in section 6.3.
Electrical braking shall not be by reverse current
Machines equipped with an electrical brake that includes electronic components must have a braking control system that meets at least the requirements of Performance Level b (PL=b) Additionally, this system should be designed in accordance with 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, it is essential to periodically test the safety-related components of braking control systems This can be achieved by monitoring the braked run-down time, with feedback obtained from either the encoder attached to the spindle motor or by measuring the residual current in the motor's power wires.
The test operates independently of the primary braking control system and requires a built-in watchdog function It functions autonomously, regardless of the operator's intentions, and is essential during the starting and stopping phases of the spindle.
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
The diagnostic coverage (DCavg) shall be 60 %
See Annex E of EN ISO 13849-1:2008 for DC estimation
A simple electronic brake, which utilizes basic electronic components such as rectifiers, transistors, triacs, diodes, resistors, and thyristors, can be classified as PL=b and designed in category 1, adhering to the specified requirements.
EN ISO 13849-1:2008 if the "mean time to a dangerous failure" (MTTFd) according to EN ISO 13849-1:2008, Table 5 reaches a value of "high" (at least 30 years)
NOTE 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 in high demand mode (PFH) for a simple electronic brake component lacking fault detection and testing capabilities (category 1), the procedure outlined in Annex D of EN ISO 13849-1:2008 must be followed.
Verification: For the determination of #un-braked$ run-down time and braked run-down time, if relevant, see the appropriate #tests in Annex H$
5.3.5 Devices to minimise the possibility or the effect of ejection
The machine will be equipped with a riving knife or knives to support the various saw blades specified in the instruction handbook for optimal performance in saw bench mode.
Verification: By checking the relevant drawings and inspection of the machine
Riving knives must be made from steel with a minimum ultimate tensile strength of 580 N/mm² or a comparable material They should have flat sides, maintaining a tolerance of 0.1 mm over 100 mm, and their thickness must fall between the width of the saw blade plate and the kerf created by the saw teeth.
Verification: By checking the relevant drawings !and" measurement.!deleted text"
!NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful."
B Width of cut b Width of saw blade
Protection against non-mechanical hazards
To !deleted text" minimise fire hazards, the requirements in #5.4.3$ and #5.4.4$ shall be met
#Verification: by checking the relevant drawings and inspection of the machine.$
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 The most relevant noise source is the rotating saw blade
Operating conditions for noise measurement shall comply with Annex A and Annex N 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 not covered by Annex A or Annex N of ISO 7960:1995, such as those with varying spindle speeds and saw blade diameters, the test report must include the specific operating conditions utilized.
Emission sound power levels must be measured using the enveloping surface measuring method outlined in EN ISO 3746:2010, with specific modifications: the environmental indicator K 2A should not exceed 4 dB; the sound pressure level difference between the background and the machine at each measurement point must be at least 6 dB, as detailed in the correction formula in section 8.3.3, Formula (12) of EN ISO 3746:2010 in accordance with EN 11202:2010; only the parallelepiped measurement surface is to be utilized at a distance of 1.0 m from the reference surface; and if the distance from the machine to an auxiliary unit is less than 2.0 m, the 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 nine in accordance with Annex A and Annex N of ISO 7960:1995
On large machines the reference box shall be as close to the noise source as possible but shall not exclude any part of the structure which radiates noise
Alternatively, where the facilities exist and the measurement method applies to the machine type, emission sound power levels may also be measured according to 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 sound power level by sound intensity method, use #EN ISO 9614-1:2009$, (subject to agreement between the supplier and the purchaser)
The emission sound pressure level at the workstation must be measured following the guidelines of #EN ISO 11202:2010$, with specific modifications: a) both the environmental indicator K 2A and the local environmental factor K 3A should not exceed 4 dB; b) the difference between the background emission sound pressure level and the workstation sound pressure level must be at least 6 dB, as per EN 11202:2010, section 6.4.1, accuracy grade 2 (Engineering); c) the correction for the local environmental factor K 3A should be calculated according to clause A.2.
#EN ISO 11204:2010$ with reference restricted to #EN ISO 3746:2010$ instead of the method given in Annex A of #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
#For noise declaration 6.3 v) shall be met.$
5.4.3 Emission of chips !!!and dust"! """
That part of the saw blade which is situated below the table shall be enclosed by an exhaust hood, which shall have an extraction outlet (see 5.2.7.3)
On machines with a maximum cutting capacity > 50 mm, an extraction outlet shall be provided on the saw blade guard (see Figure 1)
#When the opening of the capture device can not face the projection, the flow of chips and dust shall be guided efficiently to the opening of the capture device
The opening of the capture device shall be large enough to capture the chips and dust projected
NOTE 1 The size of the opening of the capture device depends on the emission pattern and the distance between the emission source and the opening of the capture device
The capture device must be engineered to reduce pressure drop and prevent material accumulation by avoiding sudden changes in the direction of extracted chips and dust, as well as eliminating sharp angles and obstacles that could lead to the trapping of chips and dust.
To ensure efficient operation, the transfer of chips and dust from the capture device to the CADES (chip and dust extraction system) must adhere to specific requirements This is particularly important for flexible connections in moving units, as it helps minimize pressure drop and prevents material accumulation.
To effectively transport chips and dust from the source to the collection system, the design of hoods, ducts, and baffles must be optimized for the air conveying velocity within the duct.
20 m s -1 for dry chips and 28 m s -1 for wet chips (moisture content 18 % or above)
#The pressure drop between the inlet of all capture devices and the connection to the CADES should be maximum 1 500 Pa (for the nominal air flow rate)
A low dust emission can be expected if the air flow rate 350 m 3 h -1 is ensured.$
#Verification: By checking of drawings, visual inspection and the following procedure:
∗ Measure the pressure drop at the chosen air flow rate by measurement under the condition given for noise measurement in the relevant C-standard or ISO 7960:1995
To measure noise levels according to the relevant C-standard or ISO 7960:1995, operate the machine without processing a workpiece Ensure the CADES is disconnected and verify that the machine generates an airflow from the capture device's inlet(s) to the connection outlet(s) to the CADES by using smoke at the connection outlet(s).
NOTE 2 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).$
!#With the exception of 6.3, the requirements of EN 60204-1:2006 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.
To safeguard individuals from electrical shock caused by indirect contacts, it is essential to implement automatic isolation of the machine's electrical power supply This can be achieved through the activation of a protective device installed by the user in the power line of the machine, as detailed in the manufacturer's instruction handbook.
Single phase motors with a rated input ≤ 1 kW, manufactured in accordance with #EN 61029-1:2009$ may be used
The protection level for electrical components must comply with section 11.3 of EN 60204-1:2006, except for three-phase motors, which require a minimum protection rating of IP 5X.
#EN 60529:1991 and EN 60529:1991/A1:2000$; b) the last sentence of 11.3 #in EN 60204-1:2006$ does not apply
In accordance with 18.2 and 18.6 of EN 60204-1:2006 the test 1 for the continuity of the protective bonding circuit and functional tests apply
Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine and relevant tests (specified in test 1 of 18.2 and 18.6 of EN 60204-1:2006)
#NOTE$ For electrical components characteristics the information from the electrical component supplier can be useful "
!The requirements of #EN 614-1:2006+A1:2009$ shall 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
The positioning, marking and illumination (if necessary) of control devices, and facilities for materials and tool set handling shall be in accordance with ergonomic principles in accordance with
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
Machine components weighing over 25 kg must be equipped with appropriate attachments for lifting devices, such as lugs, strategically placed to prevent overturning, falling, or uncontrolled movement during transport, assembly, disassembly, disabling, and scrapping.
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
If graphical symbols related to the operation of actuators are used, they shall be in accordance with Table A.1 of EN 61310-1:2008
#Further guidance is given in EN 60204-1:2006, EN 614-1:2006+A1:2009 and EN 614-2:2000+A1:2008.$
Also see #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 the machine."
!NOTE On displaceable machines the designer should consider weight and ease of moving "
In accordance with #EN ISO 4414:2010$
In accordance with #EN ISO 4413:2010$
!The machine shall have sufficient immunity to electromagnetic disturbances to enable it to operate correctly in accordance with #EN 60439-1:1999 and EN 60439-1:1999/A1:2004$, EN 50370-1:2005 and
Machines that use CE-marked electrical components, when installed according to the manufacturers' guidelines, are typically safeguarded against external electromagnetic interference.
Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine."
!If the machine is fitted with a laser to indicate the cutting line, the laser shall be of category 2, 2M or a lower risk category in accordance with the requirements of EN 60825-1:2007
The laser shall be fitted to the machine so that warnings on the laser itself remain visible
All guidelines from the laser manufacturer regarding installation and usage must be adhered to The laser's operating instructions should be clearly outlined in the instruction manual Additionally, warning labels and recommendations for eye protection, if applicable, should be prominently displayed on the machine near the operator's area.
Verification: By checking the relevant drawings and inspection of the machine
NOTE For the laser characteristics the information from the manufacturer of the laser can be useful "
!The requirements of Clause 5 of #EN 1037:1995+A1:2008$ apply and in addition: "
The electrical isolator of stationary machines shall be in accordance with 5.3 of !EN 60204-1:2006", except that the isolator shall not be of type d) in 5.3.2 of !EN 60204-1:2006"
For the electrical isolation of transportable machines with a rated current not exceeding 16 A and a total power rating not exceeding 3 kW see 5.3.2 d) of !EN 60204-1:2006"
When fitted with a plug to connect the machine to a 3-phase electrical supply, this plug may incorporate a phase inverter
Pneumatic systems must include isolators equipped with locking devices, such as padlocks, to ensure safety when isolating pneumatic energy However, if the pneumatic supply is solely utilized for clamping purposes, a quick action coupling, as specified in #EN ISO 4414:2010, may be used without a locking mechanism.
Where hydraulic energy is used on electrically driven machines, hydraulic isolation shall be achieved by isolation of the electrical supply to the hydraulic motor
Residual energy storage, such as in a reservoir or pipe, requires the implementation of pressure dumping mechanisms, typically through the use of a valve It is important to note that pressure should not be released by simply disconnecting a pipe.
Verification: by checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing of the machine
!The basic principles of #EN ISO 12100:2010, 6.2.15$ shall be observed and in addition at least the information for maintenance listed in #EN ISO 12100:2010, 6.4.5.1 e)$ shall be provided "
Verification: By checking the instruction handbook
#The requirements in 6.2.15 of EN ISO 12100:2010 shall apply.$
Marking
!The basic principles of #EN ISO 12100:2010, 6.4.4$ shall be observed and in addition:
Machines must have essential information marked clearly and permanently for their entire lifespan This includes the manufacturer's name and address, the year of construction, and the machine's designation and serial number Additionally, mandatory rating information for electro-technical products, such as voltage, frequency, and power, must be displayed If the machine has a pneumatic system, the nominal pressure for the circuits and details about the pneumatic isolator's function and position should be indicated Other important markings include the direction of saw blade rotation, the maximum and minimum diameters of the saw blade, and the width of riving knife guiding elements.
Labels or pictograms indicating the nominal pressure and isolators must be positioned near the installed location of the isolators on the machine.
The markings shall either be in the language of the country in which the machine is to be used or wherever possible by using pictograms
If the machine is equipped with scales the requirements of #EN 894-2:1997+A1:2008$ shall apply "
Verification: By checking the relevant drawings and inspection of the machine
The following shall be permanently marked on the riving knife: a) width of its mounting slot; b) the thickness and range of saw blade diameters for which it is designed
Permanently marked means for example engraving or etching
Verification: By checking the relevant drawings and inspection of components.
Instruction handbook
The principles outlined in #EN ISO 12100:2010, section 6.4.5, must be adhered to, and the instruction handbook should encompass the following essential elements: a repetition of the machine's markings, pictograms, and instructions, along with explanations of their meanings if necessary; a clear statement of the machine's intended use and potential for reasonable misuse; a warning about residual risks; and comprehensive instructions for safe operation, as detailed in #EN ISO 12100:2010, section 6.4.5.1 d).
1) the floor area around the machine to be level, well maintained and free from loose material e.g chips and off-cuts;
Wearing appropriate personal protective equipment (PPE) is essential for safety in various environments This includes using hearing protection to minimize the risk of hearing loss, respiratory protection to prevent inhalation of harmful dust, and gloves for handling tools, which should ideally be carried in a holder whenever possible.
3) to stop the machine running whilst unattended;
4) to report faults in the machine, including guards or tools, as soon as they are discovered;
5) to adopt safe procedures for cleaning, maintenance and remove chips and dust regularly to avoid the risk of fire;
6) to ensure that any spindle ring and saw flanges used are suitable for the purpose as stated by the manufacturer (see #5.2.3.3$);
7) to refrain from removing any off-cut or other part of the workpiece from the cutting area whilst the machine is running;
To ensure safe machine operation, it is crucial that all guards and safety devices are properly positioned, maintained, and in good working order Additionally, a minimum free space of 500 mm beyond the maximum length of the workpiece must be maintained at the outfeed end of the machine If necessary, guidelines for securely fixing the machine to the floor should be provided The specifications for compatible saw-blade and milling tool diameters and thicknesses must also be outlined For machines equipped with a glazing bead saw unit featuring a riving knife, it is essential to position the riving knife so that the distance between it and the saw-blade is appropriately maintained.
3 mm and 8 mm; i) that only correctly sharpened saw-blades and milling tools manufactured in accordance with
Operators must be adequately trained in the adjustment and operation of the machine, including its correct use, as specified in EN 847-1:2005+A1:2007 It is essential to provide adequate general or localized lighting Additionally, relevant information should be given on avoiding contact between tools and other machine parts during powered spindle adjustments, such as the proper positioning of the manually adjustable mechanical restraint device or numeric control system If the noise enclosure is not interlocked, it should remain closed as much as possible to maximize noise reduction Lastly, information about the chip and dust equipment fitted to the machine is also necessary.
3) pressure drop at each dust extraction connection outlet;
4) recommended conveying air velocity in the duct in m s -1 ;
5) cross section dimensions and details of each connection outlet o) information that during use the machine shall be connected to an external chip and dust extraction system;
#External chip and dust extraction equipment with fixed installations are dealt within
The EN 12779:2004+A1:2009 standard emphasizes the importance of safety in machining operations It mandates that dust extraction equipment must be activated prior to starting any machining tasks Additionally, it requires that machines be isolated or disconnected from their electrical power supply before changing tools Maintenance should only be performed when the machine is completely isolated from all energy sources to prevent any involuntary restarts The standard also provides guidelines for safe cleaning practices and outlines methods for the safe dissipation of residual energy in machines equipped with hydraulic or pneumatic systems.
#5.4.13$); u) those safety devices which shall be tested, how frequently the tests shall be carried out and the test method This shall include at least the following:
1) emergency stop(s) - by functional test;
2) interlocked guards - by opening each guard in turn to stop the machine and by proving an inability to start the machine with each guard in the open position;
3) interlocked guards with guard locking - by proving an inability to open each guard whilst the spindle is running and start the machine with each guard in the open position;$
4) any trip devices - by functional testing;
To ensure compliance, it is essential to conduct functional testing of the brake(s) to verify that the machine stops within the specified time Additionally, a declaration of airborne noise emission must be provided, indicating either the actual measured value or a value derived from measurements taken on identical machinery, following the methods outlined in section 5.4.2.2.
6) A-weighted emission sound pressure levels at workstations;
7) A-weighted sound power level emitted by the machinery;"
The declaration must include a statement detailing the measuring method employed, the operating conditions during the test, and the associated uncertainty values K, following the dual-number form of declaration as specified in #EN ISO 4871:2009.
4 dB when using #EN ISO 3746:2010$ and #EN ISO 11202:2010$;
2 dB when using #EN ISO 3743-1:2010$ or #EN ISO 3743-2:2009$ or
1 dB when using #EN ISO 3745:2009$ for example, for a sound power level : #L WA = xx dB$ (measured value)
Associated uncertainty K = 4 dB Measurement made in accordance with
If the accuracy of the declared emission values is to be checked, measurements shall be made using the same method and the same operating conditions as those declared
The noise declaration shall be accompanied by the following statement :
Emission levels quoted do not guarantee safe working conditions, as there is only a correlation between emission and exposure levels Reliable determination of necessary precautions is complicated by various factors, including the workroom characteristics and the presence of other noise sources, such as the number of machines and adjacent processes Additionally, permissible exposure levels differ by country This information aids machine users in better assessing hazards and risks.
Sales literature must include information on noise emission alongside performance data It should detail the necessary conditions to prevent the machine and its components from overturning, falling, or moving uncontrollably during transport, assembly, dismantling, disabling, and scrapping Additionally, the operating procedures in case of an accident or breakdown must be outlined, including methods for safely unblocking the equipment if a blockage occurs Identification data for user-replaceable spare parts that impact operator health and safety should be provided, excluding parts that can only be changed by the manufacturer or authorized personnel Lastly, information on protecting individuals from electrical shock due to indirect contact should be included, specifically regarding the installation of an automatic disconnection device in the power supply line.
Fixed guards that require removal by the user for maintenance and cleaning purposes must be distinguished from those that can only be dismounted by the manufacturer or authorized personnel.
Verification : By checking the instruction handbook and relevant drawings."
(normative) Open frame machines stability test
Under a load of 700 N applied as shown in Figure A.1, the deflection of the free table leg shall be ≤ 20 mm
Figure A.1 — Stability test for open frame machines
Dimensional tolerances of saw spindles
Diagram Object Limit deviation mm Measuring instruments
Measurement as close as possible to the saw flange
Measuring run-out of saw spindle 0,03 Dial gauge
Apply axial pressure F as recommended by manufacturer
Measuring camming of the saw flange 0,03 for M ≤ 100
Riving knife mounting strength test
The machine must be equipped with the largest saw blade designed for it, positioned at its highest point The riving knife should be aligned so that its tip matches the highest point of the saw blade's periphery and tightened to a torque of 25 Nm A horizontal load of 500 N is applied to the tip, and to pass the test, the deflection A must not exceed the limits specified in Table C.1.
Saw blade diameter for which riving knife is designed ≤ 315 mm > 315 mm
Figure C.1 — Riving knife mounting strength test
Riving knife lateral stability test
The riving knife must be firmly secured to accommodate the maximum diameter saw blade for the machine When a horizontal load of 30 N is applied to the tip, as illustrated in Figure D.1, the maximum allowable deflection, denoted as \(d\), should not exceed 8 mm.
Figure D.1 — Riving knife lateral stability test
# # Saw blade guard stability test with lead-in or in-feed rollers $ $ $ $
General
All tests shall be performed without a saw blade fitted to the machine.
Machines with saw blade guards with lead-in
The test loads shall be applied to the saw blade guard 40 mm above the furthermost point of lower edge which is parallel to the table (see Figure E.1)
The measuring point A shall be located at the same point where the test load is applied (see Figure E.1)
The measuring point B shall be located at a point on the top edge directly above the saw blade spindle axis (see Figure E.1)
The deflections of the saw blade guard shall be as follows: a) ≤ 8 mm at measuring point A; b) ≤ 3 mm at measuring point B.
Machines with saw blade guards with in-feed rollers
Test loads must be applied to the saw blade guard at a height of 40 mm above the lowest point of the first in-feed roller, directly above the furthest point of the lower edge that is parallel to the table, excluding the in-feed roller support (refer to Figure E.2).
The measuring point A shall be located at the same point where the test load is applied (see Figure E.2)
The measuring point B shall be located at a point on the top edge directly above the saw blade spindle axis (see Figure E.2)
The deflections of the saw blade guard shall be as follows: a) ≤ 8 mm at measuring point A; b) ≤ 3 mm at measuring point B
Figure E.1 — Stability test for saw blade guards with lead-in
Figure E.2 — Stability test for saw blade guards with in-feed rollers
# # Saw blade guard mounted on the riving knife or separately stability test
General
All tests shall be performed without a saw blade fitted to the machine.
Separately from riving knife mounted saw blade guards
F.2.1 Saw blade guards with lead-in
The test loads shall be applied to the saw blade guard 40 mm above the furthermost point of lower edge which is parallel to the table (see Figure F.1)
The measuring point A shall be located at the same point where the test load is applied (see Figure F.1)
The measuring point B shall be located at a point on the top edge directly above the saw blade spindle axis (see Figure F.1)
Under a test load F of 20 N the deflections D of the saw blade guard shall be as follows: a) ≤ 8 mm at measuring point A; b) ≤ 3 mm at measuring point B
Figure F.1 — Stability test for saw blade guards with lead-in mounted separately from riving knife F.2.2 Saw blade guards with in-feed rollers
Test loads must be applied to the saw blade guard at a height of 40 mm above the lowest point of the first in-feed roller, positioned directly above the furthest point of the lower edge that is parallel to the table, excluding the in-feed roller support (refer to Figure F.2).
The measuring point A shall be located at the same point where the test load is applied (see Figure F.2)
The measuring point B shall be located at a point on the top edge directly above the saw blade spindle axis (see Figure F.2)
Under a test load F of 20 N the deflections D of the saw blade guard shall be as follows: a) ≤ 8 mm at measuring point A; b) ≤ 3 mm at measuring point B
Figure F.2 — Stability test for saw blade guards with in-feed roller mounted separately from riving knife
Riving knife mounted saw blade guards
The test load must be applied to the upper edge of the saw blade guard's lead-in when the guard is lowered to the machine table, with the saw unit set to its maximum cutting height as designed.
The measuring point for the deflection is at the same level as the application point of the load
The deflection (D) of the saw blade guard must be ≤ 15 mm when subjected to a test load (F) of 5 N for machines with a maximum saw blade diameter of 315 mm For machines with a saw blade diameter exceeding 315 mm, the deflection (D) should not exceed 8 mm under a test load (F) of 20 N.
The saw blade shall not touch the guard
Figure F.3 — Stability test for riving knife mounted saw blade guards$$$$
# # Impact test method for guards
General
This annex outlines the testing requirements for guards on circular saw benches, dimension saws, and building site saws to reduce the risk of tool parts or workpieces being ejected from the working area.
This annex applies to guards as well as on samples of guards' materials.
Test method
This test method simulates the risk of tool parts or workpieces being ejected, enabling the assessment of the strength and resistance of guards and guard materials against penetration and dislodgement caused by ejected components.
The testing equipment comprises a propulsion device, a projectile, a support for the test object and a system that allows to measure or record the impact speed with an accuracy of ± 5 %
The projectile is an 8 mm diameter steel ball with specific properties: a tensile strength ranging from 560 N/mm² to 690 N/mm², a yield strength of at least 330 N/mm², an elongation at rupture of 20% or more, and a hardness of 56 ± 4 HRC over a minimum depth of 0.5 mm.
The test involves using the guard or a sample of the guard material, with the support equivalent to the guard mounting on the machine Samples of guard materials can be fixed on a rigid frame with an inner opening of 450 mm × 450 mm, and the mounting of the sample must be done using non-positive clamping.
The impact test shall be executed with projectile indicated in G.2.3 and an impact speed of 70 m s -1 ± 5%
To achieve optimal results, impacts should be directed as squarely as possible to the surface of the material sample or guard The projectiles should specifically target the weakest and most vulnerable areas of the guard, or aim for the center of the material sample.