Programmable temperature control unit

industrialfor the plastics industrydata acquisition

Overview
The TRUMPF temperature control records thermal radiation on the component surface with an integrated pyrometer and regulates laser power to a set nominal temperature. It is designed for laser plastic welding and laser case hardening, delivering consistent results on complex geometries. With scanner optics the controller integrates into the PFO electronics; for fixed optics a compact control box is supplied.

Key benefits

• Accurate process control – Adjustable nominal temperature and limit-value parameters for reproducible results.
• Seamless integration – Pyrometer mounted directly on the optics; parameterisation via TruControl.
• Traceability – Stored temperature data for quality records.
• Early detection – Trend indicator to spot slow process drifts.

Applications

• Laser plastic welding – quasi-simultaneous method: Measures the joining zone temperature and regulates laser power to the nominal temperature for closed-contour welding with scanner optics.
• Laser plastic welding – contour method: Ensures uniform heat input when the component is rotated under a fixed beam for consistent seam quality.
• Laser case hardening: Measures surface temperature during hardening and controls laser power spatially to avoid heat accumulation at edges, holes and corners, achieving uniform hardness depth; scanner optics and oscillating beams enable varied geometries and track widths.

Technical data (comparison)
Feature | Temperature control for plastic welding | Temperature control for laser case hardening
Available lasers | TruDiode 151, TruDiode 301, others on request | TruDisk up to 6 kW
Available focal lengths | 200 / 250 mm (BEO D50); 200 / 280 mm, others on request (PFO 20-2 post-objective) | 560 mm, others on request (PFO 20-2 post-objective)
Available collimation focal lengths | 35 mm (BEO D50); 34.5 / 56 / 80 mm (PFO 20-2 post-objective) | 80 mm (PFO 20-2 post-objective)
Pyrometer measurement range | 180 °C - 520 °C (ε = 1) | 650 °C - 1600 °C
Pyrometer measurement rate | 2 kHz (500 µs) | 4 kHz (250 µs)
Temperature control cycle rate | 12.5 kHz (80 µs) | 12.5 kHz (80 µs)
Typical precision | 3 % at 250 °C (annual calibration) | 2 % at 1000 °C (annual calibration)

Additional product information
The pyrometer is mounted directly on the optics; with scanner integration the controller is part of the PFO electronics. Fixed-optics versions include a compact control box. Stored temperature data supports traceability and the system adapts laser power when temperature behaviour deviates due to material variations or impurities.

Characteristics / technical specifications

• Product name: Temperature control
• Integration: Direct coupling of pyrometer to optics; integration into PFO electronics with scanner optics
• Scope of delivery (fixed optics): Compact control box included
• Pyrometer measurement range (plastic welding): 180 °C – 520 °C (ε = 1)
• Pyrometer measurement range (case hardening): 650 °C – 1600 °C
• Pyrometer measurement rate: 2 kHz (plastic welding), 4 kHz (case hardening)
• Temperature control cycle rate: 12.5 kHz (80 µs)
• Typical precision: 3 % at 250 °C (plastic welding); 2 % at 1000 °C (case hardening) — annual calibration recommended
• Available lasers: TruDiode 151, TruDiode 301 (plastic welding); TruDisk up to 6 kW (case hardening)
• Available focal lengths: examples include 200 / 250 mm (BEO D50), 200 / 280 mm (PFO 20-2) for plastic welding; 560 mm (PFO 20-2) for case hardening
• Collimation options: 35 mm, 34.5 / 56 / 80 mm
• Data handling: Stored temperature data and trend indicator for process monitoring and traceability