OS-250CZ
Sundarc
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Designed specifically for office proofing and agile manufacturing, this offline selective wave soldering machine offers a practical balance of precision and compact design. Occupying less than 1 square meter of floor space (approximately 0.8㎡), it serves as a valuable solution for R&D laboratories, engineering offices, and small-scale production facilities where space is limited. The system features an efficient 16 kg solder pot, which reduces solder alloy inventory and minimizes dross generation compared to traditional large-scale equipment.
This machine is engineered to solve the complex welding challenges associated with small batches and multiple varieties of products. It supports rapid line changes and intuitive programming, allowing operators to transition between different board designs with minimal downtime. A key capability is the option to set the parameters of each soldering point individually, ensuring targeted thermal profiles for sensitive components. Furthermore, it easily accommodates double-sided PCBs and products featuring exceptionally tall components at the bottom, providing engineers with greater design flexibility and reliable through-hole soldering performance.
Product Advantage
Integrated Process Modules: The equipment's design effectively integrates the flux spraying and soldering modules into a single compact footprint. An optional preheating function is available to accommodate specific thermal requirements, ensuring proper flux activation and reducing thermal shock to the PCB.
Stable Soldering Dynamics: Utilizing a fixed solder pot while moving the PCB to achieve soldering ensures a stable solder wave. This mechanism minimizes wave fluctuation, resulting in consistent and precise solder joints across the entire board.
Ultra-Compact & Energy Efficient: Occupying an area of only about 0.8㎡, the machine drastically reduces facility space requirements. Combined with its low power consumption design, it helps facilities control their daily operational costs while maintaining consistent output.
Flexible Manual Handling: The system relies on manually placing and removing PCB boards. This manual loading approach is advantageous for prototyping and high-mix, low-volume production, allowing operators to quickly inspect boards and switch between different product runs without adjusting complex automated conveyors.
Product Application
Our offline selective wave soldering machine is trusted across demanding industries that require reliable through-hole connections and strict process control. By providing localized soldering without exposing the entire board to high temperatures, it is well-suited for sensitive assemblies. It can be widely used in military electronics, aerospace, medical equipment, new energy, automotive electronics, communication equipment, household appliances, digital products, stage lighting, and other specialized fields.
PCBA Field
Electronic Components
Industrial Control
Aerospace
Home Appliances
Military Electronics
Marine Electronics
Automotive Electronics
Communication Equipment
Stage Lighting
New Energy
Medical Devices
Product Operate Guide
To ensure a smooth transition from installation to active production, the machine is driven by a PC-based control system. The software supports many different soldering modes tailored to various component types and board layouts. Customers can effortlessly configure distinct parameters for each soldering joint, achieving precise control over welding height, temperature, and speed. This targeted approach prevents thermal damage to adjacent SMD components and ensures proper hole fill.
The user interface is designed for simple operation, meaning engineers and operators can quickly learn to operate the machine and create new soldering programs. To further support your production and minimize potential downtime, our dedicated after-sales team offers 24-hour online one-to-one training. This comprehensive support assists you in mastering the equipment, optimizing your soldering profiles, and resolving application-specific challenges promptly.
specifications | Parameter |
Overall Dimensions | 850L*1100W*1600H (mm) |
Operating height | 900±30mm |
Weight | Approx.240KG |
Power supply | 1φ 220V 50/60HZ |
Total power | 5.5KW |
PCB parameter | |
PCB size | Min:60(L)*40(W); Max:330(L)*250(W)(mm) |
Top component height | Max180mm |
Bottom component height | Max30mm |
PCB Weight | Max5Kg |
PCB Process Edge | >3mm |
Selective spray system | |
Spray movement mode | PCB movement in XYZ axis |
Spray flux volume | 2L |
Spray nozzle type | Needle |
Spray cycle time | 1 Sec/soldered dot(The minimum spray time can be set to 0.2 seconds) |
Selective Soldering System | |
Soldering movement mode | PCB movement in XYZ axis |
| Movement mode | Servo motor + linear rail |
Solder capacity | 16KG |
Solder melting time | 30min |
Temperature setting range | Max400OC |
Temperature accuracy | ±2OC |
N2 protection system | |
N2 protection mode | Nozzle and solder pot |
Control system | |
Control mode | PC+ motion control card |
PCB Process parameter | Setting, save , open in the PC screen |
Option | |
Top safe cover | |
Common Wear & Tear Parts | |
Spray flux nozzle, Soldering nozzle | |
Q: How does your factory control the manufacturing quality of the selective soldering machines?
A: We maintain a highly stable quality control system. Our qualified product rate is currently at 99%, and we continuously strive to improve it. Before any shipment, we dedicate two full days to conduct a 100% comprehensive quality inspection to ensure equipment reliability.
Q: What is the main difference between offline selective soldering and online selective soldering?
A: Online selective soldering systems feature an integrated track system that connects front-end and back-end production processes. This allows for the simultaneous operation of preheating, flux spraying, and soldering modules within an enclosed space, making it ideal for continuous automated lines. Offline machines are typically manually loaded and are highly suitable for office proofing, small-batch manufacturing, or specialized cellular layouts.
Q: Why is there a significant price difference between online and offline selective soldering equipment?
A: Online equipment involves higher raw material and technical costs due to its complex structural design. It supports more comprehensive functions and higher performance to achieve efficient, fully automated mass production. Offline machines offer a more cost-effective solution for facilities that do not require full inline automation but still need precise, reliable selective soldering capabilities.
Q: How quickly can I receive a quotation for my purchasing inquiry?
A: We typically provide a detailed quote within 24 hours of receiving your inquiry. If your project requires an immediate response, please contact us directly via phone or WhatsApp, and note the urgency in your email so our technical sales team can prioritize your request.
Q: Do you provide customized services?
A: Yes, we provide OEM services. The machine size and functions can be customized according to your needs.
Q:What is the delivery time of your products?
A: The standard delivery time is within 35 working days after receiving payment.
Q: What is the difference between AS-350C and XS-350C selective soldering machines?
A: Both are online selective soldering machines, but XS-350C is designed for mass production work, especially for new energy products, energy storage products, automotive electronics, etc. You can choose the machine according to your product characteristics, or tell us more details about your product, we will recommend the most suitable machine for you according to your product.

