Laser Control Pyrometer

The HELISYS Laser Control System

Ultra-fast infrared temperature measurement devices optimized for use in additive manufacturing processes. They optimize all laser-based applications by either monitoring processes or controlling them to a setpoint in near real-time based on the measured temperature. The H4 measures, thinks and acts directly in the housing and passes the finished correction signal (an analog 0–10 V signal) directly to the laser.

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Can be integrated into existing laser heads

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Measures the melt pool temperature directly at the laser impact point

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Controls laser power at points where the laser would otherwise burn the material during changes in direction

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What can you do with it?

High-SpeedLlaser Cladding – Ultra-Fast & Flawless Coatings

Ultra-fast coating, perfectly controlled: The H4 controls melt pool temperatures in microseconds even at extreme feed rates – ensuring flawless, ultra-thin protective layers.

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Prevents thermal overheating of the underlying substrate material.

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Matches energy input precisely to the dynamic high-speed powder flow.

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Ensures uniform layer thickness and a flawless metallurgical bond.

High-speed laser cladding with an off-axis coupled pyrometer optics

Graph of the measured temperature of a brake disc during coating.

High-speed laser cladding with an koaxial coupled pyrometer optics

Graph of the measured temperature of a brake disc during coating, with coaxially coupled pyrometer optics.

LMD – High-Precision Metal Deposition

Consistent quality with every track: Whether for repair or 3D shaping, the integrated PID controller prevents heat accumulation as part height increases, securing a homogenous microstructure.

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Minimizes residual stress and thermal distortion in the component.

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Guarantees optimal fusion between the deposited metal and base material.

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Maintains consistent track width and height throughout the process.

Laser metal deposition temperature coaxial coupled, PID controlled

Graph der Temperaturmess- und Regelkurve bei Laserauftragsschweißen

The surface temperature is extremely constant because the PID controller continuously adjusts its power output to the heating component.

LPBF – Intelligent Powder Bed Control

Real-time control in the powder bed: Eliminate scrap at overhangs and sharp corners – the H4 adjusts laser power in-track and in real time to match local thermal conditions.

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Eliminizes temperature drift during long, complex build cycles.

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Optimizes melt pool stability via ultra-fast, real-time power adjustment.

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Prevents critical defects like micro-cracks and structural delamination.

Additiv gedrucktes Sensortherm-Logo und das zugehörige 3D-Temperaturverteilungsbild

To sum up very briefly:

3 Grafiken, die den Kreis aus Messen, Überwachen und Regeln zkeigt.

Highspeedpyrometer sind verfügbar als:

  • 1-color pyrometers with an exposure time < 20 µs for over 50000 measurements / s (50 kHz measurement frequency).
  • H3-2-color pyrometers with an exposure time of <40 µs for over 25000 measurements / s (50 kHz measurement frequency).
  • H4-2-color pyrometers with an exposure time < 25 µs for over 40,000 measurements/s (40 kHz measurement frequency).