Inrotech-WeldLogic® is the proprietary software intelligence behind Inrotech’s robotic welding systems, such as the Inrotech-Crawler®. It was developed to automate complex multipass welding with exceptional precision, adaptive planning, consistency, and minimal operator input. This innovation brings advanced robotic logic and adaptability to on-site and large-scale fabrication, where manual welding or traditional automation would otherwise struggle.
At its core, WeldLogic® transforms the robot from a simple motion system into an autonomous welding planner — capable of scanning, analyzing, and executing welding sequences based on the real geometry of each pass on the fly.
Visualization of live welding metrics
- Weld Pass – Current pass (e.g., 2 of 14) — how many weld layers/passes are completed.
- Layer – Shows which layer is being welded (e.g., 2 of 8). Remaining Time – Estimated time left for the ongoing weld sequence.
- Weld Speed – Travel speed of the welding torch (20.9 cm/min in this example).
- Heat Input (1.7 kJ/mm) – Energy applied per millimeter of weld, linked to quality and distortion control.
- Gas Flow (18.8 l/min) – Shielding gas rate — ensures proper gas coverage.
- Temperature (134.76 °C) – Real-time sensor feedback from the weld environment.
The WeldPlanner: The brain behind welding automation
Once the operator initiates a new welding job via the intuitive tablet HMI, the system’s laser scanner automatically measures and identifies the actual groove geometry. The WeldPlanner — the central computational module of Inrotech-WeldLogic™ — processes this scanned data and calculates all relevant welding parameters.
These include:
- Number and location of passes
- Layer heights, weaving patterns and torch angle
- Welding speeds, currents, and voltages
- Adaptive parameter adjustments based on groove position, tolerance variations
Minimal input, maximum intelligence
- Thickness and Groove type (e.g. V, half-V, or narrow groove)
- Groove orientation (Flat, inner circle, outside circle)
- Wire and gas selection
After this, the Inrotech-WeldLogic® system performs the rest. The robot scans the joint, plans the sequence, and begins welding autonomously. This ease of use allows a single operator to supervise multiple Inrotech-Crawler® units simultaneously, significantly increasing productivity and reducing labor costs.
Integration of sensors and smart tools
- A 2D laser scanner from Micro Epsilon for high-accuracy joint mapping
- A temperature sensor for preheat and interpass measurement
- A water-cooled welding torch from Abicor Binzel
- A pulse deslagging unit for automatic slag removal
- A gas monitoring system for real-time control of shielding gas flow and pressure
From scanning to execution
- Measure preheat/interpass temperature
- Execute weld pass
- Clean torch using compressed air
- Pulse deslagging and re-scan of groove
- Automatic adjustment of next pass
Why this process is critical
In advanced welding applications, particularly for heavy-plate and multi-pass joints, precision and repeatability are vital. Every weld pass affects the next: temperature, slag residue, groove geometry, and deposition rate must all be monitored and controlled.
The Inrotech-WeldLogic® sequence eliminates these risks by providing real-time scanning, automated cleaning, and adaptive recalculation between each pass. By re-scanning after every deposited layer, the system updates the weld geometry and corrects for even small deviations caused by heat distortion or filler accumulation.
Efficiency, quality, and repeatability
WeldLogic® technology brings measurable benefits across productivity and quality metrics:
- Time savings: Automated planning and execution reduce setup time dramatically.
- Quality assurance: Every pass is planned according to exact geometry, ensuring compliance with the clients WPS parameters and minimizing human error.
- Process consistency: Intelligent monitoring and parameter adaptation maintain uniform quality over long welds and complex geometries.
- Operational simplicity: No offline programming or robot teaching required.
The Inrotech-Crawler®, combined with Inrotech’s robust mechanical systems — lightweight titanium rails, a collaborative UR3 robot arm, and a Lincoln Electric power source — harnesses WeldLogic® to deliver a portable yet industrial-grade welding solution perfectly suited for shipyards, offshore structures, and heavy fabrication environments.
Inrotech-WeldLogic® represents a breakthrough in autonomous welding technology. By combining intelligent scanning, automated planning, and adaptive execution, it bridges the gap between flexible robotic automation and the demanding reality of large-scale on-site welding.
The result is faster, smarter, and safer welding — with precision that rivals the factory floor, anywhere
