SIASUN has focused on welding automation for over 20 years and is a leading welding automation system integrator in China, providing customers with comprehensive automated, digitalised, and intelligent welding solutions.
SIASUN’s welding automation solutions are widely used in body-in-white, automotive parts, automotive seats, special vehicles, containers, construction machinery, shipbuilding, and hydrogen energy equipment industries.
SIASUN can undertake overall planning, engineering design and implementation, and information technology construction services for factory-level projects, leading industry progress with intelligent manufacturing technology.
| Model | SR12A-12/1.46 | SR25A-12/2.01 | |
| Load Capacity | 12kg | 12kg | |
| Repeat Positioning Accuracy | ±0.03mm | ±0.07mm | |
| Maximum Working Radius | 1465mm | 2010mm | |
| Motion Range | J1 | ±180° | ±180° |
| J2 | +90°, -170° | +90°, -165° | |
| J3 | +180°, -200° (Combined) | +190°, -200° (Combined) | |
| +150°, -90° (Single Axis) | +160°, -85° (Single Axis) | ||
| J4 | ±180° | ±180° | |
| J5 | +145°, -160° | +145°, -160° | |
| J6 | ±360° | ±360° | |
| Maximum Motion Speed | J1 | 200°/s | 200°/s |
| J2 | 200°/s | 220°/s | |
| J3 | 220°/s | 220°/s | |
| J4 | 400°/s | 400°/s | |
| J5 | 430°/s | 430°/s | |
| J6 | 720°/s | 720°/s | |
| Permissible Wrist Torque | J4 | 23N·m | 23N·m |
| J5 | 20N·m | 17N·m | |
| J6 | 9N·m | 9N·m | |
| Permissible Wrist Inertia | J4 | 0.4kg·㎡ | 0.4kg·㎡ |
| J5 | 0.38kg·㎡ | 0.35kg·㎡ | |
| J6 | 0.1kg·㎡ | 0.1kg·㎡ | |
| Robot Weight | 120kg | 250kg | |
| Input Power | 1.2kW | 2.2kW | |
| Protection Rating (Wrist) | IP65 | IP65 | |
| Cable Routing | Internal Routing | ||


| Welding Machine Model | Dex2 350LDR | ||
| Control Mode | Digital IGBT Control | Efficiency | 87%@350A |
| Input Voltage | Three-phase AC 380 V (±25%) | Output Characteristics | CV |
| Input Frequency | 40~70Hz | Wire Feeding Speed | 0.5–28 m/min |
| Inverter Switching Frequency | 110kHz | Parameter Channel Storage | 50 Groups |
| Rated Input Capacity | 13.7KVA / 12.6KW | Operating Temperature | -10°C~40°C (Power source starts at -39°C) |
| No-load Voltage | 77V | External Dimensions | L*W*H(mm) 647×291×572 |
| Rated Output Current | 350A | Weight | 40kg |
| Rated Output Voltage | 31.5V | Protection Class | IP23 S |
| Load Factor | 100%@350A | Insulation Class | H |
| Power Factor | 0.92 | Cooling Method | Forced Air Cooling |
The SIASUN Dex2 350LDR welding machine is actually a fully digital IGBT inverter multi-functional ultra-low spatter gas shielded welding machine manufactured by Megmeet. SIASUN uses it as a complementary welding machine in its thin plate welding system.
This welding machine features advanced welding technology, reliable stability, and diverse functions. It is suitable for industries such as construction machinery, steel structures, special vehicles, automotive parts, two/three-wheeled vehicles, containers, and oil and petrochemicals.





The core welding technology of the Siasun Dex2 350LDR welding machine is “low spatter, high efficiency, and multi-material compatibility.”
Through three major processes—”DC ultra-low spatter, critical pulse, and high-speed welding”—it covers the welding needs of most metal materials, making it particularly suitable for scenarios with high requirements for weld formation, mass production, and cost control (reducing grinding/consumables) (such as construction machinery, automotive parts, and steel structures).
In practical applications, simply matching the corresponding process parameters and consumables based on “material type + plate thickness” achieves stable and reliable welding results.

Construction machinery

Steel structure

Shipbuilding

Containers
