Description
Industrial CNC Tube Laser Cutter LT120 – 2KW High-Precision Fiber System
The LT120 CNC Tube Laser Cutter is a high-performance industrial solution engineered specifically for the high-speed processing of small to medium-diameter tubing. Equipped with a 2KW fiber laser source and a specialized 120mm square chuck system, this machine addresses the rigorous demands of the furniture, automotive, and medical equipment industries. By integrating high-torque servo motors with a rigid, stress-relieved machine bed, the LT120 delivers exceptional positional accuracy and repeatability in continuous production environments.
Unlike multipurpose laser systems, the LT120 is optimized for tube dynamics. The 120mm square chuck configuration provides superior clamping stability for square, rectangular, and oval profiles compared to standard round chucks. This stability is critical when maintaining high rotational speeds, ensuring that the centrifugal forces do not compromise the centering accuracy of the workpiece. The 2KW power rating offers an ideal balance of energy efficiency and cutting speed for carbon steel, stainless steel, and aluminum alloys up to 8mm in thickness.
Advanced 120mm Square Chuck Technology
The core of the LT120’s precision lies in its pneumatic self-centering square chuck system. Standard round chucks often struggle with thin-walled rectangular tubing, leading to point-contact deformation or slippage during high-acceleration rotations. The LT120’s square chuck utilizes a four-claw synchronized clamping mechanism that distributes pressure evenly across the profile surface. This design minimizes surface marking on sensitive materials like polished stainless steel while providing the grip necessary for 1.2G acceleration.
The chuck is driven by high-inertia Yaskawa or Delta servo motors, coupled with precision planetary reducers. This ensures that the rotational axis (W-axis) remains perfectly synchronized with the longitudinal movement (X-axis). The system supports a maximum rotation speed of 120 RPM, significantly reducing cycle times for complex geometries and intricate hole patterns. Furthermore, the chuck’s internal through-hole is precision-ground to reduce friction and prevent material galling during high-speed feeding.
Zero-Tailing and Material Optimization
Material waste is a primary cost driver in tube fabrication. The LT120 incorporates a specialized “Zero-Tailing” or “Ultra-Short Tailing” technology. By utilizing a three-chuck configuration or a specialized pull-through rear chuck design, the machine allows the cutting head to process material extremely close to the clamping point of the final section. In standard configurations, tailing waste can exceed 200mm; the LT120 reduces this to as little as 40mm to 65mm, depending on the profile geometry.
This efficiency is managed through the FSCUT3000S or FSCUT5000 control system, which dynamically adjusts the chuck positions during the cutting cycle. As the rear chuck pushes the tube forward, the front chuck maintains stability. For the final cut, the rear chuck moves through the front chuck (in specific configurations) to ensure the laser head has access to the very end of the workpiece. This capability is essential for high-volume production where a 10% reduction in scrap directly impacts the bottom line.
2KW Fiber Laser Source and Optical Path
The 2KW fiber laser source—typically sourced from IPG or Raycus—provides a high-brightness beam with a BPP (Beam Parameter Product) optimized for thin to medium wall thicknesses. The fiber delivery system is entirely enclosed, eliminating the need for mirrors and beam alignment required by CO2 systems. This results in a maintenance-free optical path and significantly lower operating costs.
The cutting head features automated focal adjustment, allowing the software to change the focal point based on the material type and thickness. This is particularly useful when transitioning between piercing and cutting phases. The head is also equipped with a sensitive capacitive height sensor, which maintains a constant standoff distance between the nozzle and the tube surface. This compensates for any slight deviations or bowing in the raw material, ensuring a consistent kerf width and edge quality throughout the entire length of the tube.
Mechanical Rigidity and Motion Control
To maintain accuracy at high speeds, the LT120 utilizes a heavy-duty welded steel plate bed. The frame undergoes a strict thermal aging process (annealing) to eliminate internal stresses, followed by precision milling on a large-scale gantry machining center. This ensures that the mounting surfaces for the linear guides and rack-and-pinion systems remain perfectly flat and parallel over the life of the machine.
The motion system employs YYC precision gear racks and HIWIN linear rails. The combination of high-rigidity mechanical components and a high-speed bus-based control system allows for a maximum linkage speed of 100m/min. The Z-axis (vertical movement of the head) is optimized for rapid response, allowing the head to leapfrog over tube corners without decelerating the entire system, a feature critical for maintaining productivity on square and rectangular profiles.
Technical Specifications Table
| Parameter | Specification |
|---|---|
| Laser Power | 2000W (2KW) |
| Laser Source | Fiber Laser (IPG / Raycus / Max) |
| Max Tube Diameter (Round) | 120mm |
| Max Tube Diameter (Square) | 120mm x 120mm |
| Min Tube Diameter | 10mm |
| Max Raw Tube Length | 6000mm (Optional 9000mm) |
| X/Y Axis Positional Accuracy | ±0.03mm |
| X/Y Axis Repeatability | ±0.02mm |
| Max Rotation Speed (W-Axis) | 120 RPM |
| Max Acceleration | 1.2G |
| Chuck Type | Pneumatic Square Self-Centering |
| Tail Material Length | ≤65mm (Zero-tailing options available) |
| Control System | CypCut FSCUT3000S / FSCUT5000 |
| Nesting Software | TubesT / CypTube |
| Cooling Method | Dual-Temperature Industrial Chiller |
| Power Requirement | 380V / 50Hz / 60Hz |
| Machine Weight | Approx. 4,500 kg |
Software Integration and Intelligent Nesting
The LT120 is powered by the FSCUT series bus-based control system, which is the industry standard for tube laser processing. The system supports real-time monitoring of gas pressure, laser power, and temperature. The integrated TubesT nesting software allows for the import of 3D files (STEP, IGS) and automatically generates the most efficient cutting paths. It includes specialized functions for common tube processing challenges, such as “Weld Seam Detection” and “Corner Cooling,” which prevents over-burning on the sharp corners of square tubes.
The software also features an automatic centering algorithm. Before the cutting sequence begins, the machine can perform a quick probe of the tube’s actual position. If the tube is slightly bent or not perfectly centered in the chuck, the software offsets the cutting path in real-time to ensure that holes and cutouts are perfectly centered relative to the tube’s actual geometry. This level of intelligence reduces the reliance on perfectly straight raw material, which is often difficult to source in bulk.
Industrial Applications and Material Versatility
The 2KW LT120 is designed for versatility across various industrial sectors. In the fitness equipment industry, it handles the high-speed cutting of oval and rectangular frames with complex interlocking joints. In the HVAC sector, it provides clean, burr-free cuts on thin-walled galvanized and stainless steel piping. The square chuck is particularly advantageous for architectural metalwork, where precision in square-tube mitering is required for high-quality welding and assembly.
The system’s gas control module allows for seamless switching between Oxygen (for carbon steel), Nitrogen (for stainless steel and aluminum), and Compressed Air (for thin-walled economical cutting). This flexibility, combined with the 120mm capacity, makes the LT120 an essential tool for job shops and OEMs looking to modernize their tube fabrication capabilities with a focus on precision, speed, and minimal material waste.
