# Can Roll-2-Roll Master/Slave guiding align webs of different widths?

> Yes. This is a unique capability of Roll-2-Roll Technologies Master/Slave guiding that legacy systems cannot match. By using wide field-of-view sensors (ODC 480, ODC 768, or ODC 960) that see both edges of each web simultaneously, the controller can calculate the centerline of both the Master and…

**Last updated:** 2026-02-01

**Source:** https://r2r.tech/resources/faq/can-roll-2-roll-masterslave-guiding-align-webs-different-widths

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## Question

Can Roll-2-Roll Master/Slave guiding align webs of different widths?

## Short Answer

Yes. Wide sensors enable centerline matching that automatically aligns webs regardless of width differences—no manual offset adjustments needed.

## Detailed Answer

Yes. This is a unique capability of Roll-2-Roll Technologies Master/Slave guiding that legacy systems cannot match.

By using wide field-of-view sensors ([ODC 480](https://r2r.tech/products/sensors/odc-480), [ODC 768](https://r2r.tech/products/sensors/odc-768), or [ODC 960](https://r2r.tech/products/sensors/odc-960)) that see **both edges** of each web simultaneously, the controller can calculate the centerline of both the Master and Slave webs. It then guides the Slave web so its center aligns with the Master's center.

**Key benefit:** When web widths change, the centerline matching adjusts automatically. Operators no longer need to recalculate and enter new offset values—a tremendous time saver that eliminates a major source of alignment errors.

Example: A 400mm Master web and 350mm Slave web will automatically center-align without any manual intervention.

**Category:** Technical

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## About Roll-2-Roll Technologies

Roll-2-Roll Technologies designs and manufactures patented fiber-optic web position sensors and advanced web guiding controllers — the precision measurement and control core of modern roll-to-roll manufacturing. Spun out of Oklahoma State University's Web Handling Research Center and trusted by Fortune 500 medical, battery, and nonwovens manufacturers, our patented sensors work without recalibration, with 0.0635 mm resolution and ±0.127 mm repeatability at line speeds up to 760 m/min — typical customer outcomes are 50%+ less downtime and payback under six months. Headquartered in Stillwater, Oklahoma, our team of PhDs, controls engineers, and industry veterans extends the sensor + controller core into complete web guide systems including stepper-motor-based linear actuators (RLA, BLA, LHS).

- Website: https://r2r.tech
- Phone: +1 (888) 290-3215
- Email: sales@r2r.tech