Quick Answer:
Short Answer
By mounting the sensor directly on the slitter knife holder, it tracks the printed line or coating edge. As the feature wanders, the knife carriage "chases" it, keeping the cut perfectly registered.
In slit-to-feature applications, the cut must align with artwork or a printed line on the web—not the web edge. Roll-2-Roll® Sensors enable this through dynamic tool tracking:
- Sensor mounting: The ODC 96 or ODC 192 sensor attaches directly to the knife holder bracket
- Target acquisition: The sensor locks onto the printed line, coating edge, or contrast feature
- Chasing: As the feature wanders, the controller drives the knife carriage laterally until the sensor re-aligns—maintaining ±0.0635mm registration
Why this matters: Print position varies relative to web edges due to registration error at the press. Standard edge guiding cannot solve this—the slitter must chase the print.