SMT machines are high-cost, high-speed automated equipment. Once production begins, they can complete a work order quickly. However, the risk of loading incorrect component reels is significant. If a mistake occurs, the entire work order may produce non-conforming products, causing substantial losses. For this reason, many factories assign considerable resources to carefully verify materials before starting the SMT machine. At present, most SMT loading verification still relies on manual checks, and the main sources of error include the following:
- Incorrect labeling on the component reel, where the material name does not match the actual component.
- Incorrect reel preparation quantity, especially when the prepared quantity is insufficient.
- Manual recording of feeder numbers and reel correspondence, which can easily lead to transcription errors.
- Wrong placement order when feeders are inserted into the machine after loading.
- The fundamental cause is that manual checking is always prone to occasional oversights.
- To reduce manual errors during material verification, an SMT error-proofing system using a PDA can automatically check whether the loaded materials match the production requirements, minimizing the occurrence of wrong components.
The error-proofing approach combines software and hardware through barcode technology. The system automatically compares the engineering BOM, the station list, and the actual materials used at each station.
Key steps for error-proofing implementation:
- Import the pick-and-place machine station list into the system with one click, and automatically compare it with the BOM to prevent station list errors.
- During loading or splicing, operators scan the station number on the machine and then scan the barcode label on the material. The system automatically verifies whether the loading is correct. If an error is detected, the system alarms and locks the line. The IPQC must confirm the cause and enter a password to release the alarm. Unauthorized splicing also triggers an alarm and line stop.
- After the operator scans and confirms a station, the system prompts the IPQC to perform measurement on the IPQC computer. The measured value from the bridge meter is transmitted to the system, which automatically judges the measurement result.
- Production can begin only after all first-loading stations pass IPQC measurement.
For non-standard scanner brackets, feeder identification plates, or custom fixtures used in these error-proofing systems, Hansheng Automation can provide precision machining based on customer drawings.
