From Small Home Appliances to New Energy Applications — A Complete Production Line Redefining Efficiency and Quality

As the electronics manufacturing industry continues to evolve toward higher integration, greater reliability, and increased production flexibility, the precision and stability of Surface Mount Technology (SMT) have become critical factors for manufacturers seeking a competitive advantage.

Eton delivers a complete SMT full-line solution featuring proven equipment performance, closed-loop production control, and comprehensive global service support. Our solutions serve a wide range of industries, including home appliances, new energy, automotive electronics, industrial control systems, and consumer electronics.

Let's take a closer look at each key stage of the SMT production process and explore how Eton's integrated solution enhances manufacturing performance.

1. Fully Automatic Solder Paste Printer

Position in the SMT Line

First station of the SMT production process.

Solder paste printing quality directly determines the yield potential of the entire production line. The Eton ET Series Fully Automatic Solder Paste Printer utilizes a fully closed-loop control system and a high-rigidity precision platform to achieve industry-leading printing accuracy.

Key Specifications

• Alignment Accuracy: ±0.025 mm
• Control System: Fully closed-loop control with real-time feedback correction
• Applications:
• Home appliance control boards
• New energy BMS boards
• Industrial control motherboards
• Consumer electronics PCBs

In applications such as Battery Management Systems (BMS) and automotive electronic controllers, ±0.025 mm alignment accuracy enables stable, bridge-free solder paste deposition even on fine-pitch QFP components and connector pads with 0.4 mm spacing.

For mixed-assembly PCBs commonly found in the home appliance industry, the intelligent pressure compensation system ensures consistent solder paste transfer across both large electrolytic capacitors and miniature SMD components.

2. SPI – Solder Paste Inspection System

Position in the SMT Line

After solder paste printing and before component placement.

Undetected printing defects can quickly propagate through subsequent manufacturing stages, significantly increasing rework costs. SPI serves as the first quality checkpoint in the SMT process.

Key Specifications

• Technology: 3D White Light Interferometry
• Detection Rate: 99.5%
• Inspection Items:
• Solder paste volume
• Area
• Height
• Offset
• Bridging
  • Feedback Mechanism:
    Real-time communication with the printer for automatic parameter adjustment

In automotive and new energy applications, solder joint reliability directly impacts product safety and operational lifespan. The SPI system accurately measures solder paste volume and identifies defects such as insufficient paste, excessive paste, uneven height, and bridging before components are placed.

For high-volume home appliance manufacturing, a 99.5% detection rate allows production lines to operate continuously with minimal manual intervention, reducing labor requirements and sampling inspections.

Value in the Production Flow

SPI acts as a critical quality gate between printing and placement, preventing defective boards from entering more costly assembly stages.

3. High-Speed Pick and Place Machine

Position in the SMT Line

After SPI and before reflow soldering.

The YT Series High-Speed Pick and Place Machine is the core engine of Eton's SMT solution and one of the most popular systems among electronics manufacturers.

Key Specifications

• Placement Speed: 85,000 CPH (Components Per Hour)
• Core Technologies:
• AI Vision Recognition
• Polarity Error Prevention
  • Component Range:
• 0402 components to 45 × 45 mm ICs
• Maximum component height: 6 mm
  • PCB Size Support:
• Up to 510 × 460 mm
• Extended-length boards available

AI Vision Recognition

Powered by deep-learning algorithms, the system can automatically recognize more than 2,000 package types, ranging from MLCC capacitors and resistors to Type-C connectors, power MOSFETs, and irregular-shaped components.

Even on dark PCBs, reflective pads, or inconsistent incoming materials, the machine achieves precise positioning within milliseconds.

Built-in Polarity Protection

Incorrect component orientation remains one of the most common causes of SMT defects.

The YT Series performs 3D polarity verification before placement. Any incorrectly oriented component is automatically rejected or corrected, preventing polarity-related failures from reaching the reflow stage.

Typical Applications

• Home Appliances:
  Rice cookers, air fryers, vacuum cleaners, electric toothbrushes
• New Energy:
  BMS boards, photovoltaic optimizers, energy storage inverter controllers
• Automotive Electronics:
  Lighting drivers, window controllers, sensor modules
• Consumer Electronics:
  Smart wearables, TWS charging cases, power adapters
• Industrial Control:
  PLC modules, motor drives, instrumentation equipment

For high-mix manufacturing environments, where multiple product models are switched within a single hour, the YT Series offers rapid changeover capabilities that significantly improve productivity.

4. Reflow Oven

Position in the SMT Line

After placement and before AOI inspection.

After component placement, PCBs enter the reflow process where solder paste melts and forms reliable solder joints.

The ET-E8S Reflow Oven delivers stable thermal performance for a wide variety of electronic manufacturing applications.

Key Specifications

• Heating Zones: 10 Zones
• Cross-Board Temperature Deviation: ≤ ±1°C
• Optional Nitrogen Protection
• Compatible PCB Types:
• FR4 boards
• Aluminum PCBs
• Ceramic substrates

The 10-zone design provides extensive flexibility for lead-free, leaded, and specialty solder alloys.

A temperature deviation of no more than ±1°C ensures uniform heating across the entire PCB, significantly reducing defects such as:

• Tombstoning
• Cold solder joints
• Insufficient soldering
• Component lifting

For automotive and new energy products, nitrogen protection minimizes oxidation and improves long-term solder joint reliability.

For cost-sensitive home appliance manufacturing, nitrogen mode can be disabled to optimize operating expenses.

5. AOI – Automated Optical Inspection

Position in the SMT Line

Final inspection station after reflow soldering.

Every PCB must pass final inspection before entering subsequent assembly, testing, or packaging stages.

AOI serves as the last quality gate of the SMT production line.

Key Specifications

• Core Technology:
  Deep Learning Algorithm
• Detectable Defects:
• Open solder joints
• Short circuits
• Polarity errors
• Missing components
• Component offset
• Insufficient solder
• Excess solder
• Tombstoning
  • Outputs:
• Real-time defect marking
• Statistical reports
• MES integration

Unlike traditional template-based AOI systems, Eton's AI-powered AOI can intelligently evaluate solder joint quality rather than relying solely on image comparison.

Key Benefits

• Lower false-call rates
• Greater tolerance to normal process variations
• Detection of complex defects such as:
• Partial opens
• Lifted components
• Head-in-pillow defects
  • Continuous learning and model optimization using production data

For automotive and new energy manufacturers, AOI inspection data supports full traceability and quality audits.

For high-volume consumer manufacturing, reduced false alarms improve Overall Equipment Effectiveness (OEE) and minimize unnecessary line stoppages.

Smart Line Integration: From Intelligent Machines to Intelligent Manufacturing

Eton delivers more than individual machines—we provide a fully integrated SMT ecosystem.

Closed-Loop Quality Control

• Printer ↔ SPI:
  Automatic feedback and print parameter correction
• Pick and Place Machine:
  AI vision and polarity protection ensure placement quality
• Reflow Oven:
  Stable thermal profiles guarantee solder consistency
• AOI:
  Final quality verification powered by deep learning

Customers can choose individual equipment upgrades or complete turnkey SMT solutions.

Eton provides:

• Production line planning
• Equipment installation
• Process optimization
• Operator training
• Global after-sales support

Typical Applications

Home Appliances

Rice cookers, air fryers, coffee machines, vacuum cleaners

Value:
Fast product changeovers and AI-assisted placement for mixed-component PCBs.

New Energy

BMS boards, energy storage systems, photovoltaic optimizers

Value:
Polarity protection prevents costly failures, while SPI ensures solder joint reliability.

Automotive Electronics

Lighting modules, sensors, control systems

Value:
±0.025 mm printing accuracy and ≤±1°C thermal uniformity meet stringent automotive requirements.

Consumer Electronics

Smart wearables, adapters, TWS products

Value:
85,000 CPH placement speed supports mass production demands.

Industrial Control

PLC modules, servo drives, instrumentation

Value:
Deep-learning AOI identifies complex defects and enhances long-term reliability.

Why Manufacturers Worldwide Choose Eton

Building the Future of Electronics Manufacturing

With verified performance data, advanced automation technologies, and a comprehensive global service network, Eton demonstrates that Chinese SMT equipment manufacturers are fully capable of competing with the world's leading brands.

Whether you are a home appliance OEM/ODM manufacturer, a new energy system producer, an automotive electronics supplier, or an overseas distribution partner, Eton welcomes you to experience our complete SMT solution firsthand.

Eton — Precision Placement, Smart Manufacturing for the Future.

For technical specifications, demonstration videos, or live equipment demonstrations, please contact the Eton sales team.