Cap inspection on lubricant canisters and bottles
The neck area is imaged from the side against a backlight. In the silhouette the cap is checked for presence, and a line fitted to its top edge gives height and tilt. A product with a skewed or missing cap is removed from the line.
Tilt and height difference appear on the display and are compared with the recipe tolerance window. The skew-capped canister is pushed into the reject chute; the stack light indicates NG.
- 01 Infeed
- 02 Trigger
- 03 Silhouette
- 04 Measure
- 05 Decide
Capped bottles and canisters approach the station.
- Cap tilt
- —
- Height deviation
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
Cap ribs and reflections obscure the top edge under front lighting. Different neck heights and laterally offset caps require a shared gauging reference.
Solution approach
A neck-height backlight silhouettes the cap for the opposing telecentric camera. A line fitted to the top edge is compared with the nominal line; illustrative tilt and height difference are shown with gauging overlays.
Process steps
- 01
Infeed
Capped bottles and canisters approach the station.
- 02
Trigger
The photo-sensor sees the product and triggers the camera.
- 03
Silhouette
The backlight strobes; the neck and cap silhouette is captured.
- 04
Measure
A line is fitted to the cap top edge; tilt and height deviation are measured.
- 05
Decide
The measurements are compared with the tolerances in the product recipe.
Related applications
Let us assess your application together
We test your sample in our laboratory and report on resolution, optics and lighting selection.