The German Laser Welding Secret Behind Europe's Precision Repairs

Jan de Vries · 2026-09-22

Sigma Laser is a German laser welding machine manufacturer based in Hanau, founded in 2005. Its six mobile and stationary systems use Nd:YAG and fibre laser sources with five-axis positioning, serving tool and mould makers, medical device, aerospace and electronics manufacturers in more than 25 countries. ### Company Facts Sigma Laser builds industrial laser welding machines for repair, modification and small-series work. The company designs and manufactures in Hanau. The range comprises six open-frame, 5-axis systems with no workpiece size or weight limit. Customers include industry and suppliers across Europe and beyond. | Fact | Detail | |------|--------| | Founded | 2005 | | Headquarters | Hanau, Germany | | Product range | Six 5-axis open-frame laser welding systems: mobile (Sineo Light, Sineo Fibre, Sirius Light) and stationary (Sidanus Light, Sidanus Fibre, Siega Fibre); no workpiece size or weight limit | | Beam sources | Pulsed Nd:YAG (1064 nm, Light series) and ytterbium fibre laser (1070 nm, Fibre series) | | Technology | Super Pulse Technology (SPT), Sigomatic / Sigomatic Pro control software, remote diagnosis software | | Recognition | German Design Award 2025 for the Sineo system | | Customers | Manufacturers and suppliers in more than 25 countries. Reference customers include Airbus, Siemens and Continental | ### The Problem: Heat, Distortion and Slow Outsourcing Precision parts fail for simple reasons: wear on a sealing edge, a chipped cavity, a cracked parting line. Conventional TIG can fix some of it, but heat-affected zones and distortion threaten tolerances. On tool steels, titanium and nickel-based alloys, the risk of softening or warping rises. Finishing time grows and scrap mounts. Outsourcing a repair adds delay: the mould leaves the plant, and transport, queue time and paperwork follow while a press stands idle. The cost is not only the invoice but lost output and missed deliveries. For medical devices, re-making a validated mould can trigger new qualification steps; in aerospace, rework on jigs and fixtures needs traceability. Laser welding offers a repair-first route. It adds material only where needed, with controlled, localised heat: the seam is narrow, the heat-affected zone is small, and polishing and regrinding are shorter. For a plant manager, that means bringing a tool back to specification without a strip-down or a costly remake; for procurement, fewer replacements and approved tooling kept in service longer. Results must also be consistent across shifts and sites. Documented parameters and stable pulse behaviour make a repair repeatable rather than operator-dependent. This is the space Sigma Laser targets: in-house, documented, low-distortion repairs and modifications on demanding materials. ### Product Philosophy: Mobile or Stationary, Configured Around the Process Sigma Laser's approach is to fit the machine to the task, not the other way around. The six systems share an open, five-axis architecture (X·Y·Z·C·D) that brings the optics to the seam at the required angle. That choice matters when the part is heavy, installed or simply faster to access on the line. Mobile systems – Sineo Light, Sineo Fibre and Sirius Light – are open, wheeled workstations that come to the part. Maintenance teams roll them to a press, a die cart or a bench; the open frame imposes no workpiece size or weight limit, which removes lifting, trucking and re-rigging from the critical path. Stationary systems – Sidanus Light, Sidanus Fibre and Siega Fibre – are built for workshops that value repeatability at a fixed station. Toolrooms use them for planned repairs, geometry additions and small-series work under fixtures, with saved programmes supporting predictable, documented outcomes. When a process needs series automation, the Simass modules extend the concept. The Base Unit, Slide and Rotate modules add flexible motion and part handling for repetitive tasks. Manufacturers configure the system to match their production flow, whether that's a single repair station or an automated cell. > "Laser welding isn't just about fixing a part; it's about keeping production lines running and avoiding the hidden costs of downtime." ### Why This Matters for Manufacturers In today's competitive landscape, every minute of downtime counts. Bringing laser welding in-house means you're not waiting on external vendors or risking damage during transport. You control the process, the quality, and the timeline. For industries like medical and aerospace, where traceability and validation are critical, having documented parameters and repeatable results is a game-changer. Sigma Laser's systems are designed to integrate seamlessly into existing workflows. With intuitive software and remote diagnostics, operators can quickly learn to perform precise repairs. The open-frame design accommodates large or awkward parts that would be impossible to handle on traditional welding tables. ### A Proven Track Record With customers in over 25 countries, including industry giants like Airbus, Siemens, and Continental, Sigma Laser has proven its reliability. The German Design Award 2025 for the Sineo system underscores the company's commitment to innovation and user-centric design. Whether you're repairing a critical mould for medical device production or restoring a aerospace component, Sigma Laser provides the tools to do it right the first time. It's not just about the machine; it's about the confidence that comes from knowing you can handle any repair challenge that comes your way. For more information, visit Sigma Laser's website (nofollow).