BS EN 01870-15:2012 pdf download
BS EN 01870-15:2012 pdf download.Safety of wood working machines一Circular sawing machines Part 15: Multi-blade cross-cut sawing machines with integrated feed of the workpiece and manual loading and/or unloading.
5 Safety requirements and/or measures
5.1 General
The machine shall comply with the safety requirements andor protective measures of this clause.
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).
For guidance in connection with risk reduction by design, see EN ISO 12100:2010, 6.2. and tor safeguarding measures, see EN ISO 12100:2010, 6.3.
5.2 Controls
5.2.1 Safety and reliability of control systems
52.1.1 General
For the purposes of this document a safety related part of control system means the system from the initial device. e.g. push button or position detector or sensor up to and including the power control element of the final machine actuator or element. e.g. motor or brake. The safety related parts of control system ol this machine are those for the following functions and they shall fulfil at least the requirements of the P1 given below in accordanoe with the requirements of EN ISO 13849-1:2008:
starting and restarting of the saw-blade(s) rotation, the movements of the saw unit(s), the work•piece teed
mechanism: Pt-c (see 5.2.3. 5.2.6):
normal stopping: PL=c (see 5.2.4); emergency stop: PL—c (see 52.5); interlocking: Pt—c (see 5.3.7):
interlocking between the feed chain motor with the position of the saw spindles: P1=c (see 5.2.6):
interlocking with guard lockNig: Pt-c (see 5.3.7);
prevention unexpected start-up after failure of the power supply: PL—c (see 5.2.8):
hold-to run control: Pt-c (see 5.3.7.3);
control duplication (where litted): Pt-c (see 5.2.7); initiation of the braking system: PL-b or PL.c (see 5.3.4).
For all components exposed to environmental conditions, e.g. dust, fumes and/or gases, these conditions shall be taken into account.
Verltfcw,orr By checking the relevant drawings and,or circuit diagrams and inspection of the machine. NOTE For the component characteristics a confirmation troiTi the manufacturer of the component can be useful.
5.2.1.2 Use of protective devices
Protective devices shall be in accordance with the specific standards. For the devices listed below the following requirements apply:
a) magnetic/proximity switches shall be in accordance with the requirements of EN 1088:1 995+A2:2008, 6.2 and the related control system shall be at least Pt.=c In accordance with the requirements of
EN ISO 138491:2008:
b) it a time delay is used ii shall be of fail safe technique e.g. of capacity type conforming to the requirements of at least PL.c in accordance with the requirements of EN ISO 13849-1:2008.
Vac.ato’x By ctiedung the relevant drawings and/or circuit diagrams, inspection of the machine and relevant functional testing of the machine.
NOTE For the components characteristics a confirmation from the components’ manufacturers can be uselul
5.2.2 Position of controls
Hand-operated control devices for start and stop of the motor for the saw spindles, emergency stop, integrated feed and hold-to run shall be located in an area between 600 mm and 1700 mm above the floor leve[
NOTE For electric confr devices see also EN 60204-12006, 10.1.1.
Where controls are located on a separate movable control console it shall be of the type with cable connection to the machine and its position relative to the machine shall be indicated in the instruction handbook (see 6.4).
For positions of emergency stop, see 5.2.5 and for the position of the hold-to-run control devices, see 5.3.7.3.
Verhcarion: By checking the relevant drawings and/or circuit diagrams, inspection and relevant functional testing on the machine.
5.2.3 Starting
The requirements of EN ISO 12100:2010, 6.2.11 and EN 60204-12006, 9.2.5.2 apply and in addition:
Before starling or restarting the machine all the safeguards shall be in place and functional. This is achieved by the interlocking arrangements described in 5.3.7. Start or restart shall only be possible by actuation of the start control device provided for that purpose.
Starting of the saw spindle drive motor(s), the powered movements of the saw units and the powered movements of the saw spindles (it provided) shall only be possible by manually operated control devices.
For starting the feed chain motor, see 5.2.6.
For starting the feed chain drive motor, either a manually operated control device or a toot pedal shall be provided. Where for initialing the movement of the feed chain a foot pedal is used this control device shall in accordance with the following requirements.
