October 24, 2026

PCB buffer machines are the shock absorbers your SMT line didn’t know it needed. They receive, store, track, and release boards to decouple machines running at different speeds, protecting throughput when one station hiccups. This guide walks through how buffers work board-by-board, where to place them in your line, how to size them correctly, and what to look for when buying one.

That humble belt speed setting in your reflow oven controller controls everything—dwell time, thermal profile, and ultimately whether your solder joints pass or fail. This guide delivers the practical math SMT engineers actually use on the shop floor, plus thermocouple profiling techniques that turn calculations into qualified recipes. Get it right and you maximize throughput without sacrificing yield.