In laser welding machine applications, the galvanometer structure plays a critical role in determining welding stability, weld quality, and maintenance cost. Based on extensive field
experience and end-user applications, Foster Laser has systematically optimized both single-wobble and double-wobble welding systems.
The following comparison provides a clear and intuitive analysis from the perspectives of structural design, system performance, welding results, and maintenance.
First Structural Comparison:
Simpler Structure Means Higher Reliability
Double-Wobble Welding System
The double-wobble system consists of two sets of vector scanning components, forming a dual-galvanometer structure.
The laser beam is reflected sequentially by two galvanometer mirrors before reaching the workpiece, producing a circular oscillating spot.
Complex mechanical and optical structure
Larger system size and higher overall weight
More suitable for automated and large-area welding applications
Single-Wobble Welding System
The single-wobble system uses one set of vector scanning components, forming a single-galvanometer structure.
The laser beam oscillates through the galvanometer and generates a linear wobble pattern on the workpiece surface.
Simpler structural design
Smaller size and lighter weight
Higher level of integration, ideal for handheld and flexible welding applications
Second Structural Performance Comparison:
Stability and Ease of Use
System Stability
The Foster Laser single-wobble system features:
Fewer internal cables
Shorter optical and mechanical paths
Lower galvanometer motor load
As a result, the overall system stability is significantly higher than that of a double-wobble structure, ensuring more reliable long-term operation.
Ease of Operation
Single-Wobble System
Clear and straightforward red-light guidance path
Easier and more intuitive spot-center alignment
User-friendly operation with a lower learning curve
Double-Wobble System
Requires alignment of two reflective mirrors
Red-light centering is more complex
Higher dependence on professional technicians
From an end-user perspective, the single-wobble system is easier to operate and commission.
Third Welding Performance Comparison:
Different Processes, Different Strengths
Single-Wobble Welding Performance
(Especially advantageous for wire-feeding welding)
More concentrated laser spot
Higher energy density
Stronger penetration capability and greater weld depth
Advantages include:
More effective melting of the base material
Capability to weld directly into the base material
Fuller weld seams with stable formation
Particularly suitable for wire-feeding welding, thin-sheet welding, and high-quality portable laser welding machine requirements.
Double-Wobble Welding Performance
(Better suited for automation)
More uniform oscillation trajectory
Larger processing coverage area
In automated welding production lines, the double-wobble system offers advantages under specific working conditions, especially for continuous and large-area welding tasks.
Fourth Maintenance and After-Sales Support:
Which System Is More Efficient?
Single-Wobble System
Higher modularity and easier disassembly
Faster and more convenient lens replacement
Significantly reduced adjustment and calibration time
With fewer required control signals and feedback channels, and combined with Foster Laser’s user-friendly UI interface, the system enables:
Rapid status monitoring of key signals
Faster and more intuitive fault diagnosis
Higher after-sales service efficiency
Conclusion
Single-Wobble System
Simpler structure · Higher stability · Easier operation
Double-Wobble System
Wider coverage · Better suited for automated welding
With mature galvanometer design expertise and strong system integration capabilities, Foster Laser delivers more stable, more efficient, and easier-to-maintain laser equipment welding
solutions for a wide range of industrial applications.
Post time: Jan-16-2026
