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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

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.


MINI – COMPACT AUTOCORRELATOR fs to ps, 420-1600nm easy to adjust and to handle


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HARMONIXX – HARMONIC GENERATION frequency converters for ultrafast lasers

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