Poor scan tracking

Support & Feedback Issues & Faults
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Like others, I seem to have issues scanning. My parts seem to lose tracking easily as it rotates around on the turn table and creates a duplicate overlapping section. I also have issues with scan depth and detail as it doesn’t want to scan into areas or notice smaller plastic catches.

For most scans I use Feature but I have heard marker might be better but I seem to have the same issues.

I have stuck a10" diameter black cardboard plate with the little white dots.

I have also tried using a feature plate while scanning in feature mode to help.

For reference, I am trying to scan an interior door handle bezel.

I am using RevoScan on a powerful desktop computer, with the scanner connected via USB 3.

I have coated my part in Weld Check Developer spray since I don’t have AESUB spray, but it is a very fine white powder.

I have tried making a reflective box like the Revo team’s with the same reflective foam.

For lighting I’ve tried using 2x 4", 18W, 1260 lumen lightbars. I have tried placing each on the sides of the pop 2 as well as both stacked on top of each-other aligned to the left of the scanner. I have tried moving angling the lights away from the part to get better falloff light vs direct light…

I have tried placing a board behind the rotating table with/without the included plastic black mat material.

I noticed for whatever reason my pop 2 has to be about 3" closer to an object than anyone else’s when I watch them scan the head statue. I can’t get the whole thing top to bottom inside the inner scan grid box.

I have tried going from Auto to Manual and adjusting the settings but many times, even when the scan says “excellent” the scan area doesn’t pick up on my part very well.

I downloaded Revo Calibration and after running the Accuracy test several times the lowest value I got is .1244 with the most common value around .16 something. Could this be the problem?

Any and all tips would be super appreciated. Unfortunately very few YouTube tutorials like to show their lighting setup and a complete “click this, then this, and this is why I’m doing x instead of y”; type presentation.

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It is not the scanner tracking issue it is the object that don’t have enough features that the scanner can recognize as tracking .
You talking about head mode ? What version of Revo Scan are you using ? The last one is 4.3.1 , if not please update your software .

POP2 max distance in feature mode should be 25 cm from the object , I think it is enough to scan easy the object , however if not you can try Body mode for greater distance then you can add additional elements around your door handle and have the extra tracking support, later you can remove it in Revo Studio .
It would the best way to do that in place of sticking markers .

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Like @PopUpTheVolume said body mode gives you a bigger fov and you can place some distinguishible objects in/around the object, do 2 scan where those objects are on different spots so you can cut them out before alining the scans.

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When Revopoint scanned a fairly featureless tyre they added a feature full statue in the centre. I suppose this gave additional tracking points and could easily be cut out in post-processing.

Could you add such an artefact to your piece for scanning in a position it could easily be removed in editing?

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Yes that what you do , they used Range for scanning the featureless tyre with the Gorilla inside .

If you put random small objects around your scanned object you create tracking for feature of body mode . Depends how big the object is .
Put your POP2 slightly above the object at 35 degrees angle … you can use turntable
Later in Revo Studio you can select the tracking objects and simply remove them

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I wasn’t talking about head mode, I actually meant when scanning the small white head statue that came with the scanner. Many reviewers make this the first object they try scanning.

What about the accuracy test results, do you think that has anything to do with it?

In your opinion, do you think light could be a problem as well, after seeing the type of lights I’m using?

When I scan the object I typically do so in “Features” mode. After reading your and everyone else’s comments it seems I should be scanning in “Body” mode. Would the scan plate I mentioned in my first post that I got from thingiverse help with this?

My Revoscan “Software Version” is 4.0.0.0227a so I will be sure to update it. I wonder how much this could have effected the problem.

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It is not bad, but you can make 3 Calibration tests a d check the lowest value of the 3 tests and let me know the number .

Yes very much , but the plate also collect much more data and you will need more time to remove it after , but you can use it

Outdated and old version , please update to 4.3.1

And as I said before , 3D structured light 3D scanners relay heavily if objects unique features , so objects without the right amount of features will not scan easy , and that is not the scanner issue but the object.

Light don’t interfere with scanning as long it is not sun light or any other infrared source light , led light do well and not interfere with scanning , but in your case it is simply the object that causes the issue .

Using the plate you mentioned or better print some cubes and bits and place around for better results .

IMG_20220523_005558
IMG_20220523_0055581920×2560 71.4 KB

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I will certainly print those cubes, thank you.

Holy cow, what a difference the new software made! It’s far more accurate and I scanned it in body mode so the part looked much better but still like it was made out of sandy clay.

I saw you had responded to someone’s post about calibration. They remarked how their scan of the included white Roman statue was sandy looking. After you helped it looked incredibly smooth. Mine looks between theirs, not as rough but definitely not as smooth.

After running Revo Calibration several times I got the lowest value of .1244 with the most common value around .16 something.

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POP2 has slightly sandy ( orange skin) effect but you can smooth it out in Revo Studio last version .
Slightly lower meshing can also reverse the effect like level 5.60 in place to go to the highest settings what is not always an option for all objects .
Your object don’t need to highest values of meshing … only the fusing do .

I think you going to have much better results soon with upcoming Revo Scan 5 …it is almost here with all new stuff and new workflow that make your scan results excellent.

I will recommend that you try to calibrate your POP2 with the last Calibration software version .
I like my POP2 to be bellow 0.9000 at least .

Don’t worry you go there , at some point in time we all was a beginners with this device and your currently project only help you with practice to archive the best results in no time .
I used POP2 for scanning so smooth features objects with perfect results , you can too.

When you print your cubes , make sure they are not smaller than at least 3x3x3 cm , the one I printed works best as they have many sides so great for tracking , but you can also print simple pyramid shapes objects to use for tracking , more walls better tracking points .