S100B Desktop Selective Soldering Machine for HMLV PCB Assembly

Introduction

The S100B Desktop Selective Soldering Machine, built by Southern Machinery (Shenzhen, China), is designed specifically for High-Mix, Low-Volume (HMLV) PCB assembly environments. Its core differentiator is simple yet powerful: ultra-fast changeover without dedicated fixtures.

For EMS factories, R&D labs, and prototyping lines that switch between dozens of board types per shift, traditional wave soldering with custom fixtures can create a bottleneck. The S100B removes that constraint entirely.

What Is the S100B Used For?

The S100B is a desktop selective soldering machine that solders through-hole (THT) components on PCBs without requiring custom pallets or fixtures. It uses a selective soldering nozzle that precisely applies solder only where needed.

Typical applications:

Prototyping and pre-production runs
Rework and small-batch THT soldering
Boards with mixed SMT and THT components
LED lighting and power supply assemblies
Industrial control and instrumentation PCBs

Key Features

Fixture-Free Operation — No custom pallets needed for each board type
Ultra-Fast Changeover — Switch between PCB types in seconds, not hours
Desktop Form Factor — Compact footprint for lab, R&D, or small-line use
Selective Soldering Precision — Reduces thermal stress on nearby SMD components
HMLV-Optimized — Purpose-built for high-mix, low-volume workflows

How It Fits Into a Complete SMT/THT Line

In a full PCB assembly line, selective soldering comes after SMT placement and reflow. It replaces or complements wave soldering when:

Only a subset of components require THT soldering
Board density or heat-sensitive parts make full-wave soldering impractical
Quick changeover between product variants is essential

The S100B pairs naturally with Southern Machinery's insertion machines (S-3010B radial, S-70LD odd-form), board handling equipment, and inspection systems.

Selection Considerations

When considering a desktop selective soldering machine, look at:

PCB size range: Maximum board dimensions
Nozzle configuration: Single vs. multi-nozzle
Solder pot capacity: Runtime between maintenance cycles
Programming interface: Offline vs. teach-in
Flux application: Spray or dip fluxing
Board support: Fixture-free holding methods

Contact Southern Machinery for a configuration matched to your board mix.

ROI & Quality Benefits

| Area | Benefit |

|---|---|

| Changeover time | From hours (fixture-based) to minutes or seconds |

| Fixture cost | Eliminated entirely |

| Floor space | Desktop footprint |

| Thermal management | Reduced stress on adjacent components |

| Labor efficiency | One operator for multiple machines in a cell layout |

FAQ

Q: Can the S100B handle lead-free solder alloys?

A: Yes. It supports standard lead-free SAC alloys (SAC305, SAC405) and traditional tin-lead solders.

Q: What is the maximum PCB size?

A: Capacity varies by configuration. Contact Southern Machinery with your board dimensions for a recommendation.

Q: Is operator training required?

A: The S100B features a user-friendly interface. Southern Machinery provides training and documentation during commissioning.

Q: How does selective soldering compare to wave soldering for HMLV?

A: Selective offers faster changeover and lower tooling cost. Wave soldering remains more cost-effective for high-volume, single-product runs.

Q: What after-sales support is available?

A: Southern Machinery provides spare parts, retrofit kits, repair services, upgrading, and training — supporting 237+ global customers since 2011.

Q: Can I see the S100B in operation?

A: Watch the demo on YouTube: S100B Desktop Selective Soldering Machine

Get a Configuration Recommendation

Contact Southern Machinery for a personalized S100B configuration.

Jason Wu

Email: jasonwu@smthelp.com

Phone: +86 13602562576

Visit file.autoinsertion.com for product catalogs and ph.smthelp.com for machine images.

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Southern Machinery — Shaping the Future of Electronics Manufacturing. Established 2011, Shenzhen, China.