contrast sensor

Hi, this is Pedro Velasco with Roll-2-Roll Technologies We want to answer one of the questions that reader in e-news sent us. His question was literally just how do you calibrate your sensors and one of the things we do with Roll-2-Roll Technologies with what we have developed It's that you have to, you don't need to do any calibration of our sensors. Right here today I'm going to do a very short demo using one of our demo units plus two of our main sensors, the 48 millimeters White light sensor to use for contrast sensing and edge sensing and then our white 221 millimeter sensors infrared which we use for edge detection but also for measuring width and center guiding. So let us show you how.

In this case you notice immediately as soon as I plug it in the sensor came on with no need of any other procedure in just coming you know. Now as you can see right now on the screen the sensor I have to go and tell it find the sensor It's searching and then as soon as I put the material It detects where the sensor is at. As you can see it's actually detecting the material as it goes through Ok so now let's say that I want to change the sensor for some other reason and now all [I] do is just unplug the sensor And as soon as I unplug it the display tells us that there's no sensor there and at the same time I'm going to plug in one of our featured sensors the 221 millimeter sensor which has many capabilities like for example We can do edge detection, it can do width sensing and immediately it detects a sensor there. However I'm going to do a search sensor and the same procedure and as soon as I put material it detects the material.

Now it is only guiding off on the edge of the material on the leading edge. That is how simple it is Change Sensors and as you can see there's no need for calibration We hope that this video has helped you understand a little bit more about our about our technology And we will continue to show more stuff, but especially the features that are sensors have. Thank you.

So here at Roll-2-Roll Technologies we keep advancing with our developments. Today I want to talk to you about the contrast sensing application and something new that we have come up with through our development space. So we have set up here a screen where we'll show you the contrast being read by the sensor below. In this case I'm going to show you this is a strip of material that has several labels on top of a white substrate and as I present it to the sensor, you will see on the screen how it can actually see each one of those labels and the position of the labels, right.

So this is a silver on white. We can also look at a white on white if necessary and as you can see it actually detects where the material is at. I think you can see the edge of the material and you can see actually the white strip in on that white substrate Another thing is we can actually also look at different colors and it can look at each one of them individually and seen on the screen. More extreme, we have this white on white label so we have a label on extremely white substrate we can hardly see it with our eyes but as you can see not only this would pick up the edge of the material and the edge of that white label on it but if we have a a printed yellow line also and you can also detect the two all at the same time.

Now what this application is one of the applications for this type of feature is for example on slitting applications where previously you would need to print a line on the on the material in order to do the slitting by guiding yourself off the line now you can do it like just guiding the material off this any type of age of a label. It doesn't matter the contrast is very low so all that because our sensor feature that can detect any type of differences in contrast with our powerful sensor application. So you can see more of this Roll-2-Roll Technologies and our website www.r2r-tech.com