Hi All,
trying to scan a centre cap of a wheel for a friend, using Mini 2,
Evey thing is going well, I have to manually set point to join the top and bottom.
When I do, and make the mesh the sides, are terribly. Bumpy and rough, but neither the scans (Fusions) of the top and bottom exhibit this
So I go to use the brush tool (Don’t want to smoothing out all the scan), it ether does nothing, or work for a bit then stop working.
I then have to quite Revo Scan, and go back it, and it’s hit or miss if it will work.
Yes I’m waiting after trying to smooth to see of it’s just taking it’s time.
My computer is running AMD Radeon RX 5700 XT and 32GB of Ram
This is usually an issue with the scans overlapping. You can try trimming down your point cloud further before merging to see if that helps. This way less of each scan overlaps each other.
What is the goal of this scan? are you going to 3d print, reverse engineer?
Thanks.
The overlap is minimal, any less and it even when adding manual points will not work.
Or do you mean something else.
The goal is to 3D print, I’m not at the level to reverse engineer, so getting as close to as a great scan result is needed.
Other option is to change the way you are scanning. turn it 90 and then go around it or spin it on the turn table. Then rotate it again and do the same thing and then merge. You will have the logo at the center that it will utilize to align.
Tried 90 degrees scanning.
And also smoothing and trimming before merging.
What a mess it’s turn into,
I winder if the scanner or software has fundamental issues!
The smoothing tool won’t fix that. In the case of misalignments like that it’ll probably make it worse by haphazardly revealing the underlying misaligned surfaces.
The parts look pretty good, but without seeing your workflow from scan to merge I don’t think we can diagnose what’s not right. A good rule of thumb is to pretend there are no smoothing tools (either the brush or the “smooth” tab). If you think you need those for alignment there’s a problem elsewhere.
The problem is, before merging it’s very smooth.
The result I just posted, is the worse I’ve seen it, if the object is laying flat, the results are very good (before merging)
I scan auto exposure.
Make sure it in the Green range. Scan at 0.1mm
Then click optimize (this seems to not do much)
Then merge, I have to do manual as it cannot work out where the top and bottom goes.
After doing this it’s still looking really good apart where it’s joined.
Then Mesh, at 6 setting (I think it’s 1.1mm at that)
And then the problems occur.
How many alignment points are you picking? It takes 3 minimum, but you can usually see additional tweaks with 4-5. Your very first image looks like it’s off a tiny bit (there’s more noise on one side of the highlighted area than the other).
Before fusing, use the Frame Edit mode to trim everything but your object. Make a backup of the project first because this is destructive and there’s no undo.
Additionally, even though I said not to, you can try the smooth function (the tab at the top, not the brush tool) on the point clouds before merging. Set it the lowest Strength and maximum Times.
If you want to share the project I can take a look at it (others may volunteer as well).
What you need to do is use the cleaning tool after merging , remove isolate points and run also on full scale overlapped points as that what it is , it is the reminds of the edges after merging .
Normally the extra stuff should be removed automatic after merge but for some reason it don’t do the job right.
Try cleaning it after merging , then mesh it after
Using the brush will not do much since that are overlapped points you dealing here with.
Cutting it off will not really solve the problem 100% either, just buggy merging registration .
Another thing you can try to cut the area out and try hole filer curved , sometimes it works well , but since the merge function has this bug for some time , I just clean it after merge to make sure nothing is left between that don’t belongs there.
the problem is in my opinion, that the two scans you made have very slightly different volumes due to some very small measurement errors. The software should be able to handle this by scaling the scans when merging so that they fit perfectly to each other again.
I make about 4-5, maybe 6 at times
usually after 3 it’s still not enough.
Just also tried frame edit and also isolation, but none seem to really help with the issue at hand>
So far, the only ting working and is very cumbersome and time consuming, is a mixture of cutting and filling in the hole, and smoothing.
Smoothing is painfully slow after making the mesh as it takes ages, have to apply, and then wait each time
Lose points and overlapped points cleaning the point cloud after merge , especially overlapped points , moving slider from 1 to 100% each time in steps to catch the overlapping , it should normally clean it all .
Since the overlapped points are not attached to the main scan after merge , smoothing will not works .
I usually do the cleaning at once in Cloud Compare
No one software scaling point clouds for merging , it would alter the dimension and accuracy , the issue @Striff has is the overlapping area that normally should be cleaned after registration to avoid overlapping points , it is not doing it right for some time as we all know leaving behind the extra unused points.
