Inline width and edge measurement on flat wire
Flat wire travels under tension on the drawing line while a side camera captures its width silhouette against a backlight. The spacing between opposite edges is measured; narrowing and edge deviation are linked to the defective-length record.
The width curve and length position of the narrowed region are reported to the PLC; the marked silhouette is stored for winding or subsequent separation.
- 01 Tensioned travel
- 02 Silhouette
- 03 Edge tracking
- 04 Width
- 05 Length record
The flat wire passes through guide rollers.
- Wire width
- —
- Edge deviation
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
Reflective flat-wire edges produce reflections under front lighting. Twist changes the apparent width; local narrowing must be separated from movement under tension.
Solution approach
A side telecentric camera views the wide face as a silhouette against an opposing backlight. Top-to-bottom edge spacing is calibrated; local narrowing and edge continuity are assessed. The camera arrangement and wire guidance require sample verification.
Process steps
- 01
Tensioned travel
The flat wire passes through guide rollers.
- 02
Silhouette
The backlight forms a silhouette of the wide face.
- 03
Edge tracking
Top and bottom edges are tracked along the wire.
- 04
Width
Opposite-edge spacing is compared with the reference.
- 05
Length record
The narrowed region is reported to the PLC.
Related applications
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