On the line that assembles fuel‑injector housings, the encoder is mounted on the drive shaft of the indexing table that moves each part from one work station to the next. Each time the table completes a step, the encoder generates a pulse that the PLC uses to confirm the exact position before a robotic picker engages. This feedback loop guarantees that the mounting pins are aligned with the drilling head, preventing mis‑drills and scrap. In welding cells for chassis sub‑assemblies, the same type of encoder is fitted to the rotary turntable that presents the component to the laser torch. The pulse train tells the motion controller when the part has reached the start angle, allowing the system to fire the laser at precisely the right moment. The encoder’s open‑collector output can be wired directly into the safety‑interlock circuit, so any loss of signal stops the machine instantly. A similar application appears in material‑handling conveyors of a stamping plant, where the encoder tracks belt speed to keep the feed rate synchronized with downstream presses.