Capex & ROI Modeling: Calculating the breakeven threshold
Breakeven annual volume threshold sits at 500,000 units/year. Annual output below 500k units: modular pallet transfer lines deliver better ROI. Annual output above 2,000,000 units: rotary cam indexing systems achieve lower unit cost per relay. Formula: Unit production cost = (Annual equipment depreciation + consumable cost) / annual qualified output. custom relay assembly line combines both structures for mixed-volume relay projects.
Yangning Hybrid Engineering Blueprint: Marrying rotary stations with linear pallet buffers
Yangning hybrid layout integrates compact rotary cam indexing core stations for precision riveting and 4-wire Kelvin testing, paired with linear pallet buffer modules for feeding and sorting. This hybrid design keeps high precision for critical relay assembly steps, while retaining multi-SKU flexibility for automotive relay families. All control systems support Modbus TCP and OPC UA. Visit Yangning (Xiamen) Intelligent Technology Co., Ltd. for factory capability review.
| Parameter | Rotary Cam Indexing System | Modular Pallet Transfer System |
|---|---|---|
| Repeatability | ±0.005 mm | ±0.01 mm |
| Typical Cycle Time | 0.6–1.2 s | 0.8–2.5 s |
| Max Throughput | > 2,000 pcs/h | 800–1,500 pcs/h |
| Changeover Time | 4–8 h | 1.5–4 h |
| Floor Footprint | 0.8–2.2 m² | 6–18 m² |
| Relative Capex | High | Medium, scalable |
| Cpk (Riveting Station) | ≥1.67 | ≥1.33 |
