Plan weight verification, reject handling and acceptance evidence around the auger filling process.
Checkweighing after auger filling confirms whether the filled pack meets the agreed weight acceptance rule. It does not replace good powder flow, stable hopper level or correct auger tooling, but it can provide the evidence needed to tune the filler, reject out-of-tolerance packs and separate dosing performance from complete-line output.
The checkweighing plan should be written before the machine is ordered. Define whether every pack is weighed, whether results are recorded, how rejects are handled and whether the check is used for monitoring only or as part of a feedback route.
Use this table to separate the filler control method from the finished-pack acceptance method.
| Decision | What to define | Why it matters |
|---|---|---|
| Weigh point | Before closing, after closing or after another downstream step. | The pack tare, settling and closure method can change what the checkweigher is measuring. |
| Pack handling | Container, pouch, bag, sachet or tub presentation at the weighing point. | Unstable packs, open tops and flexible formats may need guides, spacing or settling time. |
| Reject method | Manual hold, side reject, stop-and-alarm or another line-specific action. | The reject method affects line speed, operator response and how suspect packs are quarantined. |
| Data use | Spot check, routine production check, trend record or feedback to the filler. | The more the data is used for control, the more carefully the measurement method must be defined. |
| Acceptance evidence | Sample size, sequence, scale status and how start-up or refill events are recorded. | A useful FAT needs agreed evidence, not just a single successful weighment. |
An auger filler does not always need a checkweigher, but checkweighing should be considered when the finished pack must be accepted by weight, when product density changes, or when the buyer needs production evidence beyond the auger setting.
A compact bench or semi-automatic process may use separate bench weighing. An automatic line may justify an inline checkweigher and reject station so every pack is checked without stopping production.
Checkweighing can identify inaccurate powder filling, but it cannot by itself fix the cause. The cause may be product bulk density, hopper fill level, bridging, aeration, screw size, filling speed, pack presentation or settling after filling.
The useful approach is to use checkweighing evidence to tune the powder feed, screw tooling and operating settings, then prove the agreed result under normal production conditions.
Rejected powder packs should move to a controlled location where the operator can identify, quarantine and rework or dispose of them under the site's quality procedure. The reject method must suit the pack format and line speed.
Rigid jars, flexible pouches and bags may need different reject handling. The design should avoid damaging good packs or allowing rejected packs to rejoin the accepted stream.
To specify checkweighing after auger filling, provide the pack format, empty-pack tare variation, target fill range, closure timing, target output, reject method, required evidence and whether the check is manual, automatic or part of a feedback loop.
Send pack samples where possible. The weighing point should be planned with the filler, conveyor, closing method and inspection route rather than treated as a separate accessory.
Start with the current fill-by-weight auger filler guidance when weight evidence is central to the project. For a broader comparison, use volumetric versus gravimetric powder filling and the powder trial and FAT guide.
Send the powder, pack and acceptance method so Lancing can review whether bench weighing, inline checkweighing or a combined fill-and-weigh route is sensible.
For auger filling, the recipe setting is only useful when it is linked to a defined powder, tooling set, hopper state and weighing method. If the product settles, aerates or restarts differently after a stop, the finished-pack result may need an extra verification check.
Use the calibration and weight verification guide with checkweighing after auger filling when the project needs documented pack-weight evidence.