Fiducial marks are the reference points a pick-and-place machine reads before placing a single part. How global, local and panel fiducials work, where they belong, and what goes wrong when they fail.
OEE is Availability × Performance × Quality — but one percentage means nothing until you know how each factor was measured. How to read OEE on a real SMT line, with a worked example you can recompute.
A turnkey SMT line quote is a scope document, not a price. This guide reads it in seven blocks, exposes five hidden exclusions, and compares landed scope.
Changeover time — last good board to first good board — is the largest block of lost time on most high-mix SMT lines. This guide breaks down the five changeover clocks and applies SMED to each, with a measurement method you can run this week.
How many operators does an automated SMT line need? Count the operator-minutes per shift, staff positions — not tasks — and let automation delete tasks one by one.
GOB coating adds curing, inspection and rework time after the coating step. Plan the four blocks, overlap curing with the next batch, and promise the release date — not the coating date.
A used GOB coating machine can be a sound buy — or a glue-clogged liability. Walk-around, glue-path, motion, control-system and test-dispense checks to run on the seller's floor before you pay.
Bubbles in a GOB coating are usually process air, not bad glue. Four entry points, a diagnostic table, and the defoam decision — with the OPT315 datasheet rules.
Coating thickness drifting on your GOB line? Unstable air supply pressure is a common cause. The GOB-LXS330 needs 0.5–0.8 MPa — what happens below and above it, and the checks that catch it.
A GOB-coated module failed after the screen was installed. Work in order — record, isolate module versus position, check cabinet and installation, then the coating — before anything is opened or recoated.
Before the first GOB batch, check the glue SDS, ventilate for the ethanol released while silicone cures, label and seal both components, keep a spill kit ready, and isolate the machine before cleaning. Any missing control is a stop, not a warning.
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