Compressor assembly bottlenecks rarely come from robot speed alone
At a mid-volume white-goods factory in southern Poland, the problem was not whether robots could place compressor mounts fast enough. The real constraint was a stop-start assembly cell where missing grommets, skewed brackets, and manual rework were interrupting takt every few minutes. The plant, supplying refrigerator subassemblies for European distribution, was losing output in a part of the line that looked automated on paper but behaved like a semi-manual station in practice.
The line assembled vibration-isolation hardware and mounting brackets onto hermetic compressors before final cabinet integration. Operators were manually presenting parts, confirming orientation by eye, and keying rework events into a local HMI that never flowed upstream into production reporting. The cell met nominal design speed only during ideal runs. Actual OEE was depressed by micro-stoppages, false starts, and quality escapes that surfaced downstream during leak-test and final vibration checks.
The upgrade combined Epson SCARA robots, Cognex vision inspection, Siemens S7-1500 PLC control, and MES-level serialization. The result was not a flashy lights-out installation. It was a more useful outcome for manufacturing economics: 38% lower unplanned downtime in the compressor prep cell, 17% shorter average cycle time, and a measurable drop in rework cost per unit.
