SME-6300 Inline PCBA Cleaner — Wash, Rinse, Dry in One Pass

Flux residue rarely causes a failure on the first board. It fails later, out in the field, on the warranty line.

The SME-6300 inline PCBA cleaning machine removes rosin, water-soluble and no-clean flux residues, plus organic and inorganic contaminants, with a water-based wash, DI water rinse and hot-air dry — all in one continuous pass, without the board ever leaving the production line.

Why residue is a field problem, not a line problem

Every residue-related failure and every board that leaves the line for cleaning costs money:

• Residue fails in the field. Incomplete flux removal causes leakage, corrosion and reliability failures after the board has already shipped.
• Batch cleaning breaks the flow. Off-line cleaning means boards leave the line, queue up, and come back — killing throughput.
• High-end products demand cleanliness. Automotive, medical and industrial electronics require ionic cleanliness that hand washing or simple washing cannot reliably deliver.
• Manual washing is inconsistent. Results vary by operator, and residue stays behind in hard-to-reach areas.
• Water and chemistry waste. Uncontrolled washing consumes DI water and detergent without predictable results.

The Ionic Cleanliness Test

Decide whether you need inline cleaning before you quote a line — it costs nothing to run:

1. Where does the board go? Automotive, medical or industrial control boards carry field-reliability risk and usually require documented ionic cleanliness.
2. What flux do you run? Rosin, water-soluble and no-clean fluxes each need different wash chemistry and rinse resistivity.
3. Can the board leave the line? If cleaning means a detour and a waiting queue, you lose throughput you cannot recover.
4. What resistivity must you hit? A target like 0–18 MΩ DI rinse tells you whether batch washing is even viable.

If cleanliness is a specification, not a nice-to-have, inline is the answer.

The Vehicle: three inline units, one pass

Boards travel left to right through three units:

1. Water-based wash — removes rosin, water-soluble and no-clean flux residues plus organic and inorganic contaminants. Liquid temperature ranges from room temperature to 80 °C.
2. DI water rinse — clears ionic residue with DI water at 0–18 MΩ resistivity, supplied at 6–15 L/min.
3. Hot-air dry — dries the board completely at up to 100 °C before it exits.

The system uses a 1 µm liquid filter for consistent quality, with clean, pre-rinse and rinse tanks of 280 L, 60 L and 40 L. Boards from 50 × 50 mm to 500 × 400 mm, up to 100 mm thick with components, run at 0.1–1.5 m/min with a 900 ± 25 mm net height aligned to adjacent equipment. All values are from the SME-6300 brochure and remain subject to final technical confirmation against your boards, flux types and line layout.

Where it earns its place

• Automotive electronics — ECUs, sensors and power modules where ionic residue is a field-reliability risk.
• Medical devices — assemblies that must meet documented cleanliness expectations.
• Industrial control — boards exposed to humidity, vibration and long service life.
• High-volume consumer and ODM — where batch cleaning queues would otherwise cap throughput.

Southern Machinery pairs the SME-6300 with a full cleaning family: SME-6200 / SME-7600 inline cleaners, SC810 / SC820 / SC860 semi-inline machines, SME-5200 / SME-5300 pallet and fixture cleaners, S-6200 / SME-24 nozzle cleaners, and the CTM-500S ionic tester to verify cleaned boards.

Re-run the test as products change

Flux chemistry and board density shift with every new program. Re-run the Ionic Cleanliness Test when a new product family enters the line: the flux type and cleanliness target that suited last quarter may demand a different rinse resistivity or tank setup now. Reviewing it at each new product introduction keeps field failures out, not in the warranty queue.

Your next step

Send your board size, flux types, cleanliness target and daily volume to info@smthelp.com or WhatsApp +86 136 0256 2576 for a machine recommendation, configuration, quotation and delivery schedule — typically the same working day.

Jason Wu

Founder & CEO, Southern Machinery (Shenzhen Southern Machinery Sales and Service Co., Ltd.)

Email: jasonwu@smthelp.com / info@smthelp.com

WhatsApp: +86 13602562576

Catalog & manuals: file.autoinsertion.com | Machine photos: ph.smthelp.com

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