SMT & THT Automation Insights

A practical checklist for EMS and OEM teams to estimate PCB assembly line capacity before buying SMT/THT automation equipment.

Selective soldering is how high-mix EMS factories stop paying for hand-soldered THT joints. The SL-600 is Southern Machinery's compact mini selective soldering machine: one motion platform that performs selective fluxing and selective soldering on a fixed PCB, with PC recipe control, upper and bottom IR preheat, a 15 kg titanium solder pot, N2 inline heating and optional SMEMA online transport. This guide covers what the machine is used for, how it slots into a complete PCB assembly line, the specifications Southern Machinery publishes, the parameters a buyer must confirm before ordering, and the quality and ROI case for automating selective soldering on power supply, appliance, LED, automotive and industrial control boards.

Aqueous PCBA cleaning from Southern Machinery removes ionic contamination — flux residue, activators, and process soils — that otherwise causes electrochemical migration, dendritic growth, and leakage-current failures in high-reliability electronics. With 0.22 µm filtration and real-time 0–18 MΩ resistivity monitoring, the SCM5600D batch cleaner delivers validated ionic cleanliness for aviation, aerospace, medical, new-energy, and automotive boards. Built for EMS, ODM, and automotive-electronics procurement and engineering teams, this guide explains what the machine does, the industries it serves, how it integrates into a full SMT/THT line, the selection parameters that matter, and the ROI of cleaning rather than scrapping populated boards. Contact Southern Machinery to evaluate your specific cleanliness targets.

Every PCB in an SMT line is touched by hundreds of components but held by one thing for the entire journey: the chain clamps on the conveyor. This guide explains what chain clamps — chain claws, conveyor claws or chain fingers — actually do inside an SMT machine, from board entry to the discharge outlet, and why their grip decides print registration, placement accuracy and reflow stability. It covers five real application scenarios, how the transport system links the SMT block to THT insertion and wave soldering, the selection parameters that make two quotes comparable, and the ROI case for treating board transport as a process variable. From Southern Machinery, founded 2011 in Shenzhen, China, serving 237+ EMS and OEM electronics manufacturers worldwide.

Moisture and internal stress damage bare PCBs before they reach the line. Verified baking temperatures, storage windows and stacking rules for SMT assembly.

The S-902 Automatic SMD Counter is an optical counting machine for SMT material warehouses: it reads the guide holes in carrier tape with a fibre-optic sensor and reports the exact quantity on a reel, from -99,999 to +99,999 pieces. Instead of a hand tally two operators can disagree about, it gives the same reel the same number every time, so kitting, issuing and stock-taking stop depending on who counted. It handles pitch from 1 mm and tape width from 4 mm, accepts reels up to 600 mm, offers 18 speed levels and two counting directions as standard, and adds empty-pocket detection, barcode reading and label printing as options. This guide sets out the verified specifications from Southern Machinery's own product document, the unreconciled conflicts with the operation manual, how optical and X-ray counting divide the work between them, and a payback formula you can run with your own wage numbers.