The GL.Ultra by GFH GmbH, distributed in India by United Spectrum Instruments, redefines precision manufacturing with its unique dual-station design. By integrating two independently controlled 5-axis CNC laser micromachining systems within a single compact enclosure, it enables simultaneous or parallel micromachining operations — significantly boosting productivity while maintaining nanometric accuracy. Supporting femtosecond and picosecond ultrashort pulse (USP) laser sources, the GL.Ultra delivers athermal ablation, burr-free edges, and crack-free finishes across metals, ceramics, polymers, transparent materials, and semiconductor substrates.

What is a 5-axis CNC laser micromachining system and why does 5-axis matter? A 5-axis CNC laser micromachining system combines three linear translation axes (X, Y, Z) with two rotary axes (typically A/B or A/C) to position the workpiece — or the laser beam — in any orientation relative to the focal point. This 5-axis freedom enables the laser to access undercut features, inclined surfaces, and complex 3D geometries that a 3-axis system can only process from a single direction. For a medical stent with helical strut patterns, a turbine blade with shaped cooling holes at compound angles, or a watch component with multi-faceted surface features, 5-axis capability is not an option but a necessity — the geometry physically cannot be correctly processed from a fixed 3-axis orientation. The GL.Ultra provides full 5-axis freedom at each of its two independent stations simultaneously.

What does “dual 5-axis” mean and what throughput advantage does it deliver? Dual 5-axis means the GL.Ultra houses two complete, independently controlled 5-axis machining stations within one enclosure — each with its own laser source, beam delivery system, motion axes, vision system, and CNC controller. The throughput advantage is directly proportional to the production scenario: if Station A and Station B each run the same part programme simultaneously, production output doubles compared to a single-station system in the same footprint. If the two stations run different programmes — for example, Station A performs femtosecond surface texturing while Station B performs picosecond micro-drilling — both operations complete in the time previously required for one, and the system produces two different part types per cycle. For high-value, low-volume precision components where machine utilisation and cycle time directly determine unit cost, the dual-station architecture provides the most cost-effective path to increased throughput.

Dual Independent 5-Axis Machining Stations

At the heart of the GL.Ultra lies a twin-station architecture, with each side offering a full 5-axis CNC configuration (X/Y/Z linear axes with dual rotary A/B or A/C). The two stations are completely independent in every functional dimension — independent laser sources, independent beam delivery, independent motion controllers, independent vision systems, and independent CNC job programmes. This enables:

• Complete independence in programming and operation — Station A and Station B can run entirely different programmes, different laser parameters, different materials, and different process sequences simultaneously, with no mechanical or electronic coupling between their operations
• Simultaneous or mirrored part machining — two identical parts processed in parallel (doubling output per cycle), or mirrored left/right assemblies produced simultaneously for perfect symmetry without re-fixturing
• Batch production or sample iteration within one cycle — production parts running on Station A while process development and parameter optimisation run on Station B, using the same system time for both production and R&D
• High-volume productivity in a reduced footprint — two complete 5-axis laser micromachining systems in the floor space and service infrastructure of one, with one operator interface, one service contract, and one installation qualification

Ultrafast Laser Sources with Ultraprecise Beam Control

The GL.Ultra supports ultrashort pulse (USP) lasers — both femtosecond and picosecond sources — as the laser processing engine for each station. These are the correct laser technology for:

• Athermal material removal without heat-affected zone, recast, burrs, or microcracks — essential for medical devices, semiconductor substrates, and precision tooling where thermal damage is categorically unacceptable
• Micron-scale structuring with feature edge quality approaching optical smoothness — achievable because the absence of melt flow means no surface tension-driven edge rounding or ripple formation
• Burr-free edge quality and crack-free finishes on brittle materials (glass, ceramics, sapphire, silicon carbide) that would chip or fracture under any contact-based machining approach

Laser source options are individually configurable per station — enabling Station A to run a femtosecond laser for high-precision surface texturing or ablation while Station B runs a picosecond or CW source for drilling, cutting, or marking in the same processing cycle, giving the GL.Ultra a hybrid processing capability that no single-source system can replicate.

Nanometric Accuracy with Granite Machine Bed

The GL.Ultra is built on a thermally stable granite machine bed — a material chosen specifically because its low thermal expansion coefficient (~6 × 10⁻⁶ /°C for granite, vs ~12 × 10⁻⁶ /°C for steel) minimises dimensional change under thermal variation, and its high density and internal damping suppress the vibration frequencies that degrade positioning accuracy during high-speed scanning. The granite bed delivers:

• Vibration damping for sub-micron positioning — the granite’s mass and damping coefficient attenuate floor-transmitted vibration to levels below the 1 µm repeatability specification, ensuring that ambient factory vibration does not degrade machining quality
• Thermally stable micromachining over long operation cycles — positions programmed at the start of an 8-hour shift remain accurate at the end of the shift, without drift compensation or thermal re-zeroing
• Low expansion coefficient for consistent feature geometry — thermal variation of ±5°C in a production environment introduces <100 nm positional error per 100 mm travel distance in granite, vs ~600 nm in a steel machine bed

High-End Vision and Autofocus Systems

Each machining head on the GL.Ultra is supported by an integrated coaxial vision system — positioned along the optical axis of the laser beam delivery so the camera sees exactly what the laser sees, without parallax error between the image plane and the machining plane. This coaxial architecture enables:

• Live workpiece inspection — verifying part placement, surface condition, and feature quality in real time during the machining process without removing the part from the fixture
• Precise alignment — automatically detecting fiducial marks, part edges, and reference features on the workpiece and registering the machining programme to the actual part position with sub-micron alignment accuracy
• Automated focus tracking — continuously maintaining the laser focal point on the workpiece surface as it traverses curved, tilted, or free-form geometries in 5-axis motion, ensuring consistent ablation depth and feature quality across the entire part surface

Medical Technology and Microfluidics

The GL.Ultra is the preferred platform for medical device manufacturers requiring high-reliability microfabricated components with sub-50 µm feature dimensions and zero thermal damage. Applications include:

• Fabrication of coronary stents, peripheral stents, catheters, and biopsy needles — femtosecond laser cutting of 316L stainless steel and nitinol tube stock to strut widths of 80–120 µm with burr-free edges, no recast, and no dimensional distortion from thermal stress, meeting ISO 25539 dimensional and surface quality requirements
• Laser drilling of microfluidic channels in glass, PDMS, and polymer substrates — producing channel diameters of 10–200 µm with vertical sidewalls, no chipping, and sub-micrometre surface roughness (Ra <0.1 µm) for laminar flow performance in diagnostic devices
• Implant surface texturing for improved osseointegration — creating controlled micro-pillar, micro-groove, and nano-texture surface topographies on titanium implant surfaces that increase bone-to-implant contact without altering the alloy’s fatigue properties
• Precise contouring and feature machining of biocompatible materials including titanium (Grade 5, Grade 23), cobalt-chromium alloys, PEEK, and ultra-high-molecular-weight polyethylene (UHMWPE)

Aerospace and Defence

Aerospace and defence applications require components with the tightest geometric tolerances, full material property preservation, and complete freedom from thermally induced metallurgical change. GL.Ultra supports:

• Shaped cooling hole drilling in turbine blades and combustor liners — producing compound-angle holes with defined inlet and exit geometry, controlled depth, and no recast or HAZ in nickel superalloy (Inconel 718, Hastelloy X) and ceramic thermal barrier coating (TBC) material, meeting AS9100 quality requirements
• Edge shaping and micro-feature machining of lightweight titanium and aluminium alloys — producing complex aerodynamic profile features, locking tabs, and precision mating surfaces without inducing residual stress or surface damage that would reduce fatigue life
• Surface structuring for improved aerodynamics and tribology — micro-riblet and dimple textures that reduce aerodynamic drag on aerofoil surfaces and friction at contact interfaces
• Complex profile machining in titanium, Inconel, and carbon fibre composites — for Indian defence manufacturers including HAL, BEL, DRDO, and private aerospace suppliers under Make in India programmes

Electronics, MEMS, and Semiconductors

In the microelectronics and MEMS domain, the GL.Ultra’s sub-micron accuracy and athermal ablation deliver fabrication quality that determines device yield and performance:

• Micron-precise dicing and singulation of sapphire, silicon, GaAs, SiC, and GaN wafers — with kerf widths of 5–15 µm, no chipping, no crystal damage, and full die edge integrity, improving die yield compared to blade dicing by eliminating chipping and reducing minimum die size
• Via hole drilling for flex PCBs and HDI (high-density interconnect) circuits — producing blind vias, through vias, and buried vias with diameter accuracy of ±2 µm and vertical sidewalls for reliable copper plating adhesion
• MEMS device structuring and silicon micro-feature fabrication — producing cantilevers, proof masses, resonators, and micro-nozzle arrays with sub-5 µm feature tolerances directly in the substrate material
• Thin-film and semiconductor layer patterning for photovoltaic scribing (P1/P2/P3 lines on CIGS, CdTe, and perovskite solar cells), OLED panel repair, and ITO electrode structuring for display manufacturing

Watchmaking and Jewellery

For luxury industries where craftsmanship precision and production consistency are equally non-negotiable, the GL.Ultra delivers:

• Engraving of intricate dials, casings, movements, and decorative patterns on stainless steel, brass, titanium, and ceramic watch components — with feature resolution to 5 µm, laser-polished sidewalls, and zero thermal discolouration of adjacent polished surfaces
• Laser turning of miniature axles, gear wheels, pinions, and crowns — producing cylindrical and polygonal micro-components with sub-5 µm diameter accuracy and surface roughness Ra <0.2 µm in 5-axis simultaneous motion
• High-precision cutting and profiling of precious metals — gold alloys, platinum, silver, and palladium — with no metal loss to thermal evaporation and no contamination of adjacent precious material from melt spatter
• Custom patterning and personalisation for limited edition or bespoke pieces — 2D and 3D patterns generated directly from customer artwork files, reproducible at ±1 µm accuracy across the full production run

Precision Tooling and Micro-Moulding

The precision tool and die industry benefits from the GL.Ultra’s combination of sub-micron accuracy, athermal processing, and dual-station productivity:

• Structuring micro-cavities and surface textures in injection mould inserts — producing leather grain, carbon fibre weave, geometric micro-textures, and functional tribological patterns in hardened tool steel (up to 62 HRC) without EDM, chemical etching, or electrode wear
• Laser turning and micro-profile grinding of ultra-fine tool shafts, pins, and electrodes — producing diameters of 10–500 µm with sub-micron roundness and Ra <0.05 µm surface finish for micro-EDM electrodes and precision assembly pins
• EDM recast layer removal and surface re-polishing — femtosecond laser re-machining of EDM-processed surfaces removes the brittle white layer and restores a clean, crack-free metallic surface that extends tool service life and reduces fatigue-initiated tool failure
• High-speed precision marking of carbide, tool steel, and ceramics — permanent part identification at sub-10 µm character dimensions for complete traceability in precision tooling supply chains

United Spectrum Instruments is the official authorised distributor of GFH GmbH laser micromachining systems in India — including the GL.Ultra dual 5-axis platform and the broader GFH precision laser micromachining portfolio — providing complete technical consultation, turnkey system deployment, and long-term service for demanding industrial users across medical device manufacturing, aerospace, electronics, photonics, watchmaking, and microtooling.

Our services include:

• Application Feasibility Consultation — before system purchase, our engineers evaluate your specific part geometry, material, feature dimensions, and tolerance requirements to confirm that the GL.Ultra meets your application and to define the optimal laser source configuration, axis setup, and fixturing approach
• Turnkey Installation and Calibration — complete system installation at your facility, including site preparation guidance, foundation and vibration isolation, laser source installation, axis calibration to specification, and full acceptance testing against the published accuracy figures
• Process Optimisation — working with your process engineers to develop and validate laser parameter sets for your specific materials and feature geometries, including sample part trials and measurement verification before production release
• AMC and On-Site Technical Support — structured annual maintenance contracts with preventive service, periodic calibration verification, and priority on-site response for production-critical systems
• Training and Upgrades — operator and process engineer training programmes, software update support, and laser source upgrade path guidance as processing requirements evolve