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TECHNOLOGY SAFETY


Jailer under BS EN ISO 13849- 1:2008 so it was fail safe. These type of enclosures are for lasers, often employed with robots, for cutting and welding operations. At the school of mechanical, aerospace and civil engineering an IPG 16kW fibre laser with multiple outputs is used to deliver, through fibre, the laser light to three processing heads for cutting, welding and deposition processes. These three processing heads are mounted on three six-axis Kuka robots. Safety enclosures were required for each of the robotic processing cells.


The dimensions of the


enclosures at Manchester are 4 x 3.5 x 2.5m and one of them has double wide doors at the entrance to accommodate large work- pieces using manual forklifts. Lasermet’s system is modular and as such can be installed on almost


Solid state


lasers have more stringent needs compared to CO2 lasers


any scale; from small enclosures measuring around a cubic metre up to large rooms typically 10m x 10m x 3m. Lasermet’s fail safe technology cuts power to lasers producing stray beams in less than 50ms, preventing damage to the surrounding enclosure and possible injury to its users. Its dual channel ICS-15XM interlock control system is also linked to the relevant robot motion control circuitry. Lasermet’s safety system is hardware reliant and not dependent on software avoiding the problems of bugs and upgrades.


Family owned German laser system manufacturer Trumpf provides machines with extensive safety measures akin to Lasermet’s Laser Jailer. The company’s Ralf Kohlloeffel spoke to Electro Optics


www.electrooptics.com


about how CO2


lasers were once


all anyone had to worry about but the increasing range of powerful lasers meant enclosure safety has had to advance. For Trumpf’s latest product Kohlloeffel says: ‘At the end of 2009 we released the new generation of the 7000 series, offering solid state laser integration, higher optical energy efficiency and lower cost per part


and higher performance with lower laser power compared to CO2


lasers.’ The changes seen with the 7000 series in the design of the enclosure and peripheries are because solid state lasers have more stringent needs compared to CO2


lasers due to the different wavelength of solid state lasers. ‘For that reason gaps where laser light can directly or indirectly


penetrate the enclosure are totally forbidden for the use of solid state lasers,’ Kohlloeffel explains. The rotary changer is a turning table and brings the part from the working area so the operator can safely start loading and unloading. However, Kohlloeffel admits that the rotary changer takes up a lot of space and so it is probably not appropriate for a job shop.





AUTOCORRELATORS – ULTRAFAST PULSE WIDTH MEASUREMENTS


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SPIDER – TEMPORAL AND SPECTRAL CHARACTERISATION


LXSPIDER


750 – 900nm spectrally <20fs – 200fs pulse widths compact and rugged automatic calibration single shot capability


FC SPIDER down to 5fs pulse widths


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www.photonicsolutions.co.uk sales@photonicsolutions.co.uk


PULSESELECT – PULSEPICKERS 500-1000nm


fs or ps modelocked lasers low dispersion


division ratio down to half fundamental


HARMONIXX – HARMONIC GENERATION frequency converters for ultrafast lasers


doubling (SHG), tripling (THG) & quadrupling (FHG) fs to 10’s ps


minimum pulse broadening user-friendly and compact


FEBRUARY 2012 l ELECTRO OPTICS


23


NEW


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