Zero-Compromise
Wave Soldering
The S-WS Series delivers industrial-grade dual-wave soldering with Siemens PLC precision — handling PCBs from 50mm to 450mm wide, at 30–50% lower CapEx than Japanese alternatives.
Explore the S-WS Series Machine
Drag to rotate the machine. Click a model tab to switch between configurations. Every weld zone, sensor, and control system is visible.
S-WS450C — Flagship Dual Wave
The flagship model with 450mm PCB width, 4-zone independent PID preheat, 450kg solder capacity, and nitrogen protection system. Designed for high-volume DIP production lines.
- PCB Width: 50–450 mm adjustable
- Preheat: 4-zone hot air, 2000mm, up to 250°C
- Solder Pot: 450 kg, nodular cast iron, 350°C max
- Wave System: Dual wave (turbulent + laminar), 0–15mm
- Control: Siemens PLC + PC, PID + SSR
- Flux Spray: Japan Sanyo servo + ST-6 nozzle
- Nitrogen: 99.99% concentration, 10–25 m³/h
- Power: 3-phase 380V, max 22kW
Why Wave Soldering Still Matters
Despite the SMT revolution, 40–60% of components in power supplies, automotive BCMs, and industrial controllers still require through-hole insertion — and wave soldering remains the only viable mass-production method.
Manual Soldering Bottleneck
Hand-soldering DIP components costs $12–18/hr per operator and delivers inconsistent joint quality. A single cold solder joint in a power supply can cause field failure — costing 100× more to recall than to solder correctly.
Lead-Free Compliance Pressure
EU RoHS and China's dual-carbon policy demand lead-free soldering. SAC305 (Sn96.5/Ag3.0/Cu0.5) requires precise temperature profiling — a 10°C overshoot destroys component life, while 10°C undershoot creates brittle joints.
Japanese Equipment Cost Trap
Panasonic, Fuji, and Yamaha wave soldering lines cost 30–50% more in CapEx, with 8–12 week lead times and proprietary spare parts. For mid-volume DIP lines, the ROI math doesn't work.
How Dual Wave Soldering Works
The PCB passes through 4 process zones in sequence: flux application → preheat → turbulent wave → laminar wave → cooling. Each zone is independently controlled for optimal thermal profiling.
Turbulent + Laminar = Zero Defects
The two-wave system is the heart of modern wave soldering. The turbulent wave breaks through component-lead oxide layers for full wetting, while the laminar wave removes excess solder for clean, IPC-610-compliant joints.
Turbulent Wave (First Wave)
The first wave is a high-velocity turbulent jet that physically breaks through the oxide layer on component leads and PCB pads. This ensures complete wetting — even for components with heavy oxidation or difficult geometries.
- Velocity: high-energy jet spray
- Height: up to 30mm
- Function: oxide layer penetration
- Result: complete solder wetting on all leads
Laminar Wave (Second Wave)
The second wave is a calm, smooth laminar flow that removes excess solder from the first wave. It eliminates bridges,/icicles, and solder balls — producing clean, consistent joints that pass IPC-610 Class 3 inspection.
- Velocity: smooth laminar flow
- Height: 5–12mm adjustable
- Function: excess solder removal
- Result: bridge-free, IPC-610 Class 3 joints
4-Zone Independent PID Control
Each preheat zone is independently controlled via PID + SSR, enabling precise thermal ramp rates. The chart below shows a typical SAC305 lead-free profile for a power supply PCB.
Choose the Right S-WS Model
From compact 300mm lines to full 450mm high-volume production — one family covers every DIP soldering need.
| Specification | S-WS300 | S-WS350 | S-WS350B | S-WS450 | S-WS450C |
|---|---|---|---|---|---|
| PCB Width | 50–300mm | 50–350mm | 50–350mm | 50–450mm | 50–450mm |
| Preheat Zones | 2 | 3 | 3 | 4 | 4 |
| Preheat Length | 1200mm | 1800mm | 1800mm | 2000mm | 2000mm |
| Preheat Temp | RT–300°C | RT–220°C | RT–250°C | RT–250°C | RT–250°C |
| Solder Pot Capacity | 280 KG | 380 KG | 320 KG | 420 KG | 450 KG |
| Solder Pot Material | 316 SS | 316 SS | 316 SS | Titanium | Nodular Cast Iron |
| Wave Qty | 2 | 2 | 2 | 2 | 2 |
| Wave Height | 12–13mm | 5–30mm | 0–12mm | 0–12mm | 0–15mm |
| Conveyor Speed | 200–1400mm/min | 300–1800mm/min | 300–1800mm/min | 300–1800mm/min | 1500–1800mm/min |
| Soldering Angle | 4–7° | 3–7° | 3–7° | 3–7° | 3–7° |
| Control System | PC+PLC | PC+PLC | PC+PLC | PC+PLC | PLC+PC |
| Flux Spray | Cylinder | SMC Rodless | SMC Rodless | Sanyo Servo | Sanyo Servo + ST-6 |
| Nitrogen System | — | — | — | Optional | Standard |
| Total Power | 19 kW | 19 kW | 22 kW | 22 kW | 22 kW |
| Weight | ~1000 kg | ~1200 kg | ~1200 kg | ~1500 kg | ~1500 kg |
| Dimensions (L×W×H) | 3320×1250×1560 | 4200×1350×1650 | 3500×1400×1650 | 4500×1400×1650 | 4500×1400×1650 |
Key Subsystems
Every component in the S-WS Series is selected for reliability in 24/7 production environments — from the Siemens PLC brain to the titanium alloy claws.
Conveyor System 25B CHAIN
- Direct-connected board entry with 25B stainless chain
- High-strength aluminum alloy rails — zero deformation
- Titanium alloy claws: 2.0mm thick, 20 kg/cm resistance
- Delta inverter motor control, 0–1.8 m/min
- Manual 3°–7° angle adjustment
- Central support system prevents rail warping
Preheat System 4-ZONE PID
- 4 independent PID-controlled hot air zones
- 2000mm total preheat length (S-WS450 series)
- Room temperature to 250°C adjustable
- Star-shaped heating elements — fast, low inertia
- Transparent tempered glass monitoring window
- Circulating temperature feedback, ±2°C accuracy
Solder Pot LEAD-FREE
- 316L stainless steel or nodular cast iron construction
- 280–450 KG capacity (model-dependent)
- Room temperature to 350°C, control accuracy ±1°C
- Low tin-oxide design wave nozzle
- Cast iron heating plates — zero deformation
- Auto-protection: pump won't start until temp reached
Flux Spray JAPAN PRECISION
- Japan SMC rodless cylinder / Sanyo stepper servo
- Japan ST-6 professional liquid nozzle — never damages
- Highly enclosed independent spray box
- Flux flow: 10–100 mL/min adjustable
- Chemical pump auto-add, tray recycling
- Spray pressure: 0.25–0.45 MPa
Control System SIEMENS PLC
- Siemens PLC + PC (Dell/Lenovo) dual control
- 4.6" touchscreen HMI + Windows XP/7
- PID + SSR temperature control mode
- Weekly timer: 3 auto start/stop per day
- Acoustic-optic alarm + dual emergency stops
- Multi-PCB recipe storage and recall
Nitrogen Protection OPTIONAL
- 99.99% nitrogen concentration
- Target: ≤1000 PPM oxygen in solder zone
- Consumption: 10–25 m³/h
- Customer-supplied nitrogen source
- Reduces tin dross by 60–80%
- Improves solder joint brightness and reliability
Shenzhen Speed, Global Support
Since 2011, Southern Machinery has delivered 3,000+ wave soldering systems to EMS factories across 50+ countries. Here's why world-class manufacturers choose us over Japanese alternatives.
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