Streamline Your Workflow with SMT & THT Automation

Field notes from Jason Wu — 30+ years of hands-on THT auto insertion experience. Articles on custom-designed SMT & THT machines, odd-form feeding, wave soldering, and spare parts for future-proof, cost-effective EMS production lines.

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Oct 9, 2026

A V-cut PCB depanelizer separates a pre-scored panel by rolling a round blade along the V-groove while a flat blade supports the board underneath, so the bending moment stays inside the score line instead of loading the solder fillets beside it. The Southern Machinery S-D508 is a moveable-blade V-cut PCB depanelizer for FR4, aluminium-backed and copper panels from 0.2 to 5.0 mm thick, with a 360 mm standard cutting length and a 500 mm option, a 0 to 2 mm blade height adjustment and a 0.1 to 0.2 mm blade gap. This guide covers the documented settings, the position of the cut in a THT assembly line, derived cycle arithmetic, and the six open points the source documents leave unresolved.

Oct 9, 2026

Cost per joint is the only honest way to compare hand soldering with a soldering robot, and it is built from four inputs every factory already owns: the hourly cost of a soldering post, the seconds a joint takes, the tips and tin wire consumed, and the rework cold joints trigger. Southern Machinery's S-C5331R dual-table desktop soldering robot completes 18 pads across both tables in a 27-second cycle, solders at 0-500 degrees C with roughly 0.1 s tip recovery, and is programmed from a teaching box that stores more than 100 programs. This guide gives the cost-per-joint formula, the documented specifications, a worked payback example and the configuration checklist.

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