I got the MetroX on KS and am enjoying finding out what it can do. I have a long history of scanner use w/ $30k scanners. So while I have high hopes for the MetroX, I realize it’s not a $30k device.
I just received my large turntable and proceeded to dot it up. But when I ran it, the MetroX doesn’t seem to be picking up the Ø3mm dots. The Ø6mm are fine.
Thought I’d read where the MX had Ø3mm capability??? Any insight on this would be most helpful.
I believe I saw someone say that they could use one at a time, but both don’t work simultaneously. I believe there is a setting for marker size, but I haven’t run into it yet. I should probably look into it as I would like to use them on small items.
I do know that some types don’t work. I think it’s just the cheaper paper type. You need the ones that are reflective.
the ones I have are reflective, they glow in preview window. I have not see a setting like that either.
the setting was for removing markers from your scan, not what size it picks up
I tried some reflective 3mm and the MetroX picked them up. Remember, it is picky about distance. If you are not in range, it won’t see them.
The dots are random aliexpress magnets with the dots on one side. Only small ones I have at the moment. I did not need to change any settings. Can’t say what’s different with yours.
Any Revopoint scanner accept 3 and 6 mm inner diameter as markers , just remember that placing markers closer than 3 cm from each other can create conflicts and can jump while scanning , keep proper distance for each scanner
MetroX starts with 3 cm distance between markets no matter the size , 3 or 6 mm
I was playing with the distance between marker dots and at ~17mm one marker stopped being recognized. Three cm is probably a good rule of thumb. What’s the deal with printable markers, though? Even the ones in the Revo metrology kit are a lot closer together than 3cm.
I just telling you what the dev team told me , how smaller the FOV how smaller the distance of the markets have to be , the market may be visible at that distance but later while scanning they may show on and off and sometimes if too close causing issues .
The size of 3 or 6 mm of the markers is seeing by the software the same way .
I saw many users putting them too close and later have issues while scanning , remember the pattern need to be unique and not the same, not in a row either .
I don’t know what to say, my MetroX is very clearly NOT seeing Ø3mm markers. 
I’ve tried adjusting the depth, bringing the scanner closer and further away. Angled it. Checked the calibration.
Doesn’t see Ø3mm markers.
I use 3 mm markers all the time .
Make sure they are reflective and not simply laser printed on paper.
The angle also need to be proper while scanning usually 45 degrees max in position to the markers
Just start full Field and move your scanner above the markers at excellent distance , if not recognizing , recalibrate the scanner and try again .
I just did some quick testing. My MetroX can see 3mm markers just fine in parallel and crossed line laser modes, but in full field it does not see them. I did not try auto turntable. They do show up as 6mm sized markers.
Interestingly, I have some off brand marker dots that are 6mm, but slightly less reflective than the Revopoint ones. They are still reflective, but when I test with a flashlight held close to my eye they reflect only about 50-70% as much. When I try to scan them with either of the laser modes the MetroX does not pick them up at all, but when I scan them in full field marker mode it sees them just fine. Unfortunately I tested first with full field mode and used them on a bunch of 3D printed magnetic marker bases. Hopefully the software/firmware gets updated so that all modes can recognize them.
They will always show up as 6mm even if you use 3mm the software showing one size regardless.
The software can only recognize the highly reflective one to avoid holes on the objects to be seeing as markers .
If you still not see them in full Field and Auto mode check the calibration since your RGB may be not aligned right and if is not , it will not see well any markers .
Has anyone tried the Aesub 3mm reflective markers? My Metrox doesn’t pick them up at all.
I would be nice if the software could distinguish them. Maybe it could also help for tracking as you’d have two “classes” of markers to recognize a more unique pattern.
I purchase the cheapest reflective markers on Amazon from China and all works just fine .
Make sure you have the proper distance between them , just because they are smaller inner reflective diameter of 3 mm don’t means you can place them closer to each other , the same distance rules apply to all markers regarding of it’s diameters.
The distance between the targets wasn’t the issue. The dots are reflective when you shine some indirect light on them. As I stated MetroX doesn’t see ANY marker when using these.
How can I tune the sensitivity to track the markers? I also see the supplied markers disappearing/loosing track when scanning them.
When I increase the exposure I also see the 3mm markers blowing out because they reflect, but they never get recognized.
The only reason for a scanner not recognizing markets is bad calibration.
There is also totally different way the markers are recognized in laser mode , it only activate the small area where the laser actually shine on for safety reason , so totally different than Full Field mode
Personally I don’t like it as much . We should have an option to turn the safety off to allow greater area of markers to be captured at the same time .
The laser mode also have reduced the market recognition to avoid micro reflections from the laser on shinny surfaces to be recognized by the software as markers
I think that may be the reason why I’m laser mode it is not as powerful but that are my pure speculations from observation.
However…
I use many kind of reflective markers in a different sizes and no issue , they are recognized in the small area without issues.
Recalibrate again , and if problem still persist please contact customer@revopoint3d.com for technical support on that matter to ensure there are no other issues present .
Have a look here
Trackers in Full field mode work very differently - I also suspect there is something wrong 
Nothing really wrong , they were created like that
They will never works the same until they do not remove the laser safety that activate it only if visible by the scanner .
2 different animals and not related .
I propose you record the markers first and scan using global markers mode , it’s already much better and more effective than standard scanning.
I use both markers size but it never bothers me to be honest as I always keep it at the same distance when scanning using my desk arm .
It is possible the small markers are not recognized at the far distance because the software thinks it’s a reflection .
There is s bitter sweet relationship between the 2 of them . If they change the marker size recognition it affect objects that have holes as well .
Like I showed in my post - in Full Field mode all of the trackers just disappear.
I always use Global marker mode and in FF it’s pretty much impossible to scan anything freehand even with Global markers mode.
I also checked the same set up with Miraco and Mini - none of them have any trouble seeing those markers. As I understand, FF mode in Miraco is very similar to the way structured light scanning works on these two, so there is no reason why MetroX would be that much worse at seeing markers, no?
I have to stand with other users on this one - FF scanning in MetroX is almost useless - it works only in Auto Turntable mode.
I wasn’t able to finish a single hand held scan in FF mode.
It’s no biggy for me, as I have Miraco and Mini, so I take out MetroX only when those two fail - and that automatically means I’ll be using Metro in laser mode. But still the problem is real - the FF mode in MetroX is nowhere near as reliable as all the other structured light scanners from Revopoint