Knock Off / Reject Handling Systems
SSI designs reject handling and knock off systems from Rockford, IL that turn an inspection fail, barcode mismatch, label issue, or line-control decision into a defined response: reject, alarm, stop, hold, count, or log.
Fastest start: send line photos, throughput, part size, spacing, fail signal source, reject action, and any confirmation or logging requirements.
The inspection result is only useful if the line response is controlled.
Many production lines can detect an exception, but the hard part is removing or controlling the right item without creating a second problem. SSI scopes reject timing, product handling, confirmation sensing, operator feedback, and recovery behavior around the real line constraints.
Common reject triggers
- Barcode, 2D code, OCR, label, or print mismatch
- Vision inspection fail from upstream equipment
- Wrong product, wrong count, missing component, or bad orientation
- PLC, sensor, scanner, or operator-driven fail output
Common reject actions
- High-speed timed knock off or standard reject diversion
- Alarm, stop, hold, or operator prompt
- Reject confirmation, missed-reject alarms, and bin status
- Reject counts, event timestamps, and production records
Best-fit reject handling projects
High-speed lines
Products move quickly enough that reject distance, part spacing, encoder timing, and actuator response must be reviewed together.
Defined fail source
A scanner, camera, sensor, PLC, or HMI already defines which product is bad, or SSI is also scoping the verification station.
Controlled recovery
Operators need clear alarms, reject bins, counts, confirmation signals, and restart behavior after an exception.
What SSI needs to quote the work
Line and product details
- Line speed, conveyor type, product spacing, and reject distance
- Product size, weight, shape, stability, and presentation photos
- Available air, electrical, PLC, fieldbus, and enclosure constraints
- Guarding, access, sanitation, bin, chute, or conveyor constraints
Control and response details
- Fail signal source and timing method
- Reject, alarm, stop, hold, or log-only action
- Confirmation sensing, missed-reject behavior, and recovery logic
- Counts, timestamps, CSV, database, HMI, or MES records needed
Code mismatch to timed knock off
Example workflow: an upstream barcode or OCR check identifies a label mismatch. The line control sends a fail signal, the reject system tracks the product to the reject point, and a knockoff mechanism removes the targeted item. Confirmation sensing can verify that the reject happened, while the HMI records the event count and prompts the operator if a miss, jam, or bin condition occurs.
Related reject and verification systems
High-Speed Knockoff
Encoder-synchronized reject handling for tight reject windows and fast-moving production lines.
View High-Speed KnockoffStandard Knockoff
Standard-speed reject handling for inspection failures and controlled product removal.
View Standard KnockoffBarcode and OCR verification
Operator-facing code verification when the fail decision starts with barcode, OCR, or label checks.
View Easy ReaderQuote the reject action with the inspection criteria.
Send photos, throughput, part size, fail signal, reject location, desired reject action, confirmation needs, and integration constraints. SSI will help determine whether the High-Speed Knockoff, Standard Knockoff, or a custom reject response is the right fit.