³Ô¹Ïtv / SOLDERING ENGINEERINGMeasurement worksheet: Wave contact-time geometry01Effective contact length alongtravel · mmMeasure relevant contact region; not thenominal machine footprint.02Conveyor speed · m/minConstant travel model; not stationaryselective-solder dwell.Explanatory schematic. Not to scale, a process recipe, acceptance limit or inspection evidence.