Selective Wave Soldering Machine
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Space-Saving Compact Inline Automated Selective Wave Soldering Machine

The AFS-250C is a compact inline selective soldering system that combines spray fluxing, preheating, and soldering in a single space-saving station with a footprint of just 1.7 m² — ideal for limited production floors. It delivers high-precision, zero-defect soldering for complex through-hole PCB assemblies, backed by servo-driven high-accuracy motion positioning and stable solder wave height control, while achieving up to 90% flux savings and 95% tin slag reduction. Featuring a modular, CE and ISO certified design, the system seamlessly integrates into existing production lines, supports PCB sizes up to 330×250 mm, and offers CCD vision programming with Gerber file import and customizable soldering parameters. The streamlined single-station workflow reduces operational complexity, ensures consistent soldering quality, and enables cost-effective operation — making it a perfect fit for OEM/ODM and bulk orders.
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  • AFS-250C

  • Sundarc

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Product Overview


The AFS-250C is an Inline selective wave soldering machine engineered to address the challenges of modern electronics production. With a compact footprint of 1260L×1350W×1730H mm, it seamlessly integrates into automated production lines while maintaining robust performance. Operating on 3φ380V 50/60Hz power with a 12kW total power consumption, this machine is optimized for energy efficiency without compromising output quality.


Key highlights include:


  • Versatile PCB Handling: Accommodates board dimensions from 100×50 mm up to 330×250 mm, supporting a maximum payload of 5 kg to suit diverse project requirements.

  • Optimal Component Clearance: Engineered for mixed-technology boards, it allows top component clearances up to 130 mm and bottom clearances up to 30 mm.

  • Intelligent Control Architecture: Utilizes a reliable PC + motion control card system to facilitate intuitive programming, real-time process monitoring, and comprehensive data logging for quality assurance.


By consolidating selective soldering and flux spraying into a single, streamlined platform, the AFS-250C significantly minimizes manual handling, reduces material waste, and guarantees uniform solder joint integrity. Its modular architecture supports flexible scalability, making it an excellent investment for both rapid prototyping and full-scale production environments.


Features


High-Precision Soldering System

The selective soldering module features an XYZ-axis solder pot movement driven by precise servo motors and linear rails, ensuring micron-level positioning accuracy. Equipped with a 16 kg solder capacity and a rapid 25-minute melting time, it is fully optimized for both lead-free and traditional soldering processes. The standard D8mm nozzle (with optional sizes available) delivers targeted solder application, while the integrated N2 protection system achieves 99.99% purity, drastically reducing oxidation and ensuring superior joint reliability for critical assemblies.


Adaptive Flux Spraying

Utilizing a specialized needle nozzle paired with a servo-controlled linear rail, the selective spray system applies flux with an impressive ±0.1 mm precision. The system includes a 2L flux volume tank for uninterrupted operation. Operators can easily adjust spray pressure and duration to match specific PCB layouts. This targeted approach can reduce flux consumption by up to 30% compared to conventional wave soldering methods, directly lowering consumable costs.


Advanced Preheating and Temperature Control

A top-mounted far-infrared preheating system guarantees uniform thermal distribution across the entire PCB. This minimizes thermal stress on sensitive components and significantly improves solder wetting. Driven by a PID+SSR temperature control mechanism, the system maintains thermal stability within ±2°C. Capable of reaching preheating temperatures up to 250°C, its rapid warm-up capability helps accelerate overall production cycles.


Environmentally Friendly Design

To maintain a safe and clean working environment, the built-in exhaust system efficiently extracts fumes and particulates, featuring a 5 m³/h airflow capacity and a dedicated 1PCS exhaust unit to comply with industrial safety standards. Furthermore, the N2 protection system minimizes solder dross formation, reducing both environmental impact and material waste.


User-Centric Interface

The PC-based control panel provides a clear graphical interface that simplifies program creation, editing, and recipe storage. Full Gerber file compatibility streamlines the initial setup process, reducing downtime between product changeovers. Real-time diagnostics and automated error alerts further enhance operational efficiency, while the machine’s ergonomic 900±25 mm operating height ensures comfortable access for operators.

Applications


Consumer Electronics

Highly suitable for soldering smartphone PCBs, wearable devices, and IoT modules where miniaturization and mixed-technology components demand pinpoint accuracy. Its capability to process small PCBs down to 100×50 mm provides flexibility for low-volume runs and rapid prototyping.


Automotive Electronics

Essential for the production of ADAS sensors, automotive control modules, and infotainment systems. In these applications, solder joint reliability is critical. The 99.99% N2 protection system ensures durable connections capable of withstanding harsh automotive environments.


Industrial Automation

Supports the reliable manufacturing of PLCs, robotics controllers, and industrial power electronics. The machine's robust soldering capabilities ensure long-term performance, while its modular design allows for straightforward integration into fully automated assembly lines.


Medical Devices

Meeting stringent quality requirements, the AFS-250C provides the traceability and repeatability necessary for surgical equipment, diagnostic tools, and implantable devices. The precise PID temperature control eliminates the risk of thermal damage to highly sensitive medical components.


PCBA Field

PCBA Field

Electronic Components

Electronic Components

Industrial Control

Industrial Control

Aerospace

Aerospace

Home Appliances

Home Appliances

Military Electronics

Military Electronics

Marine Electronics

Marine Electronics

Automotive Electronics

Automotive Electronics


Communication Equipment

Communication Equipment

Stage Lighting

Stage Lighting

New Energy

New Energy

Medical Devices

Medical Devices

FAQ


Q1: What is the maximum PCB size the AFS-250C can handle?

A1: The machine is engineered to support a versatile range of PCB dimensions, from a minimum of 100×50 mm up to a maximum of 330×250 mm, with a maximum weight capacity of 5 kg. This broad compatibility ensures it can process everything from compact communication modules to mid-sized industrial control boards, meeting diverse procurement and assembly needs.

Q2: How does the N2 protection system work?

A2: The integrated N2 protection system floods the localized soldering area with inert nitrogen gas, achieving 99.99% purity. This displaces oxygen, significantly reducing the oxidation of both the liquid solder and the PCB pads. For manufacturers, this means cleaner, highly reliable solder joints, fewer defects, and a substantial reduction in solder dross, which extends the lifespan of the solder pot and lowers maintenance costs.

Q3: Can the AFS-250C handle lead-free soldering?

A3: Yes, the equipment is fully designed for lead-free soldering processes. It utilizes an advanced PID+SSR temperature control system that maintains the precise, higher thermal profiles required for lead-free alloys. This ensures optimal solder wetting and strong joint integrity while preventing thermal shock to sensitive electronic components.


Specifications

Parameter

Size

1250L*1250W*1725H(mm)

Machine frame and cover

Extruded sections frame+Door

Operating height

900±25mm

Weight

Approx.1000KG

Power supply

3φ 380V  50/60HZ

Total power

12KW

PCB parameter

PCB size

Min:100(L)*50(W);Max:300(L)*250(W)(mm)

Top component height

Max130mm

Bottom component height

Max30mm

PCB Weight

Max5Kg

Selective spray system

Spray movement mode

Serve motor + linear rail

Spray flux volume

2L

Spray nozzle type

Needle

Selective Soldering System

Soldering movement mode

Soldering pot movement in XYZ axis

Movement mode

Serve motor + linear rail

Solder capacity

16KG

Solder melting time

25min

Solder nozzle size

Standard D8mm, other sizes is option

Top preheat system

Preheat mode

Far infrared ray

Heater position

Top

Temperature control mode

PID+SSR

N2 protection system

N2 consumption

1.5M3/h

Exhaust system

Exhaust quantity

1 PCS

Exhaust volume

About 5m³/h

Control system

Control mode

PC+ motion control card

PCB Process parameter

Setting, save , open in the PC screen


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Dongguan Sundarc Automation Technology Co., Ltd. (Shenzhen Sundarc Electronic Equipment Co., Ltd.) was founded in 2010, is a collection of research and development, production and sales as one of the "national high-tech enterprises". Mainly committed to research and development of high-grade selective wave soldering equipment. 

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 +86-18029195527
 +8618029190631
 wst@sundarc.com
 Located in 4th Floor, Block B, Building 5, Guanghui Wisdom Valley, No,136, Yongjun Road, Dalingshan Town, Dongguan city, Guangdong province.
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