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Trumpf CNC laser cutters use mirrors to focus, enabling users to cut at high laser output with high quality without having to constantly clean the cutting lenses.

The cutting head strategy was introduced at the company’s in-house trade fair Intech on 27-30 April 2010 in Ditzingen.

In contrast to the lens cutting head, in which the laser beam passes through the lens, the new cutting head focuses the laser beam by reflecting it at two cooled mirrors.

Debris does not cause heating or changes in the focusing properties, which is why the cutting head with mirrors cuts perfectly at high laser output, according to Trumpf.

The new cutting head is now available for the 2D laser cutting system Trulaser 5030 in combination with the CO2 laser Truflow 6000.

At high laser output, focusing lenses react sensitively to dirt and debris.

Laser beams are absorbed by even the smallest particles and transformed into heat.

In the worst case, this damages the lens coating and makes the lens unusable.

Consequently, users must clean the lens often in order to maintain high cutting quality.

The uncoated copper mirrors of the new cutting head, on the other hand, are more rugged.

Even debris that would make a lens unusable for cutting has almost no effect on the focusing mirror.

One feature that makes this possible is continuous water cooling behind the surface of the mirror.

This dissipates the heat generated when debris absorbs the laser radiation.

Therefore, the focusing mirror exhibits a longer lifecycle than the lens.

Even extensive soiling of the mirrors can be simply removed.

This opens up the possibility for the user of processing materials outside his usual range.

The mirrors can deal with possible splatters without permanent damage.

Therefore the user can define the appropriate laser parameters without the risk of disrupting the cutting optics.

Whereas a lens must be cleaned after 24 hours of continual use with a 6kW laser, mirrors will only have to be cleaned after about 240 hours of operation.

The mirrors are also quick and easy to clean.

They are loosened with commercially available tools, cleaned with a special cleanser and cotton pads and then easily reinstalled.

The nozzles do not have to be re-centred after installation; precise stops ensure that the mirrors are always seated in the right position.

The design provides for pressure conditions inside the cutting head that prevent penetration of cutting gas, fine particles, or environmental air into the beam guide of the machine.

This guarantees consistent and dependable operation, Trumpf said.

The cutting head with mirrors is equal to the lens cutting head, both in the sheet thickness that can be cut and in feed speeds.

Furthermore, synchronous starting enables an optimised flow between piercing and cutting.

This increases process reliability and reduces the time for each part.

The interface with the cutting head seating is the same for mirror and lens cutting heads.

This makes it possible to change cutting heads in one move.

The new cutting head can be retrofitted in Trulaser 5030 systems delivered after November 2008.

The application determines which cutting head is more advantageous: for high-speed or compressed air cutting, the lens cutting head provides full flexibility and high advance speed.

For standard processes and demanding tasks, the mirror cutting head ensures good processing results and high reliability.


Remaining profitable today is a challenge and staying competitive in the future requires solutions that can adapt to your every-changing business needs. The technology built into TRUMPF precision machinery gives fabricators the flexibility to increase the efficiency of their high-quality, close-tolerance part production – in small batches or high volume jobs.

TRUMPF ranks among the world's leading manufacturers of production technology and industrial lasers. Technical solutions for its customers have been the company's focus since 1923. In every technology group TRUMPF machines are designed to minimise unit costs and to provide reliability and a rapid return on investment.

All machines are designed to accept flexible and expandable automation. The choices range from simple productivity gains from features such as automatic laser nozzle exchange through to all the elements necessary for full lights out production.

In the field of CO2 and solid state production lasers the TRUMPF product spectrum is now unparalleled and its experience extends from OEM systems to small hand-manipulation processing stations through to large 5-axis machines. It has competence at any level of power from 2W to 20kW.

The production processes for which TRUMPF lasers are designed are numerous and include welding, cutting, drilling, tube processing, surface treatment, additive manufacturing and component marking.

TRUMPF punching is much more than simply making holes. The TruPunch range of machines provides complete part processing – including forming – and virtually eliminates the need for secondary processing. And in its TruMatic series these benefits are combined with laser cutting; the best of both worlds.

The TRUMPF TruBend press brakes use patented technology to ensure that the bending angle is precise, right from the start and can handle small, complex or single components cost efficiently. Completing the main technology groups are the TRUMPF TruTool range of power and pneumatic portable fabrication equipment.

Under the umbrella of TruServices TRUMPF provides a highly comprehensive range of business services to support its customers. This starts with finance – TRUMPF operates its own bank – and includes full software support both at machine and business level. A wide range of predictive maintenance and service packages are also available as is application and product specific training.

With TRUMPF nothing is left to chance. In every aspect of its business, customers can be assured of quality and exceptionally value for money.

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