# SCU6x Controller   Web Detect Indicator

> This video focuses on the Web Detect Indicator on the SCU6x controller interface. Learn how the Web Detect Indicator functions, what it looks like under normal operating conditions, and what to do if it's not functioning properly. The Web Detect Indicator should be green when the web is present a...

**Last updated:** 2026-03-03

**Source:** https://live-roll2roll.pantheonsite.io/videos/scu6x-controller-web-detect-indicator

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This video focuses on the Web Detect Indicator on the SCU6x controller interface. Learn how the Web Detect Indicator functions, what it looks like under normal operating conditions, and what to do if it's not functioning properly. The Web Detect Indicator should be green when the web is present and gray when it's not. If the indicator is blinking, it could indicate a problem with the sensor, such as improper installation or angling.

## Transcript

[Music] another key thing on the bottom left right about that heartbeat LED is called a web detect indicator right now you can't see anything it's gray but when I present the web there it turns green when I take it off it's gray so that is what we call as a web detect indicator think when when you are under normal operating conditions that uh should be green all the time I'm going to make it kind of flicker back and forth just by moving the web closer or farther away from that sensor and you don't want that to be blinking like this that's not a good sign and then the first thing that we are going to look at is is the sensor installed properly is there something in the background on the sensor that we need to consider and and is it angled properly so that it's not picking up something and losing the web position both heartbeat and web detect indicator are two important things that are available on the home screen

## Related Products

- SCU6x

**Tags:** SCU6x

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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 at ±0.1mm accuracy up to 760 mpm — 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).

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