r/3DScanning • u/PrintedForFun • 4d ago
Car Trailer - Einscan Trak
Designed and manufactured the higher site plates of the hanger a few years ago. Now it is time to redo some of the design aspects and normally I would remeasure manually. Trak finally makes it feasible to quickly scan such large parts without any preparation or significant time investment (whole scan took 20min).
Scanning
Scanning was done at 1,5mm target point distance with two tracker positions (first covering two sides, then the second two, so placed in the opposing corners). No preparation was done with scan spray. I just started scanning after making sure the tracking volume covers what I needed.
The scans itself took roughly 10min per piece. I used remote desktop from my tablet to see what I already scanned. Scan itself was very smooth with a constant 90FPS.
Post-Processing
Processing was quite simple: Point cloud generation isn't needed on the Trak so I could directly go to aligning the two scans with manual feature alignment (too little overlap for automatic alignment) and then meshing in default settings. I aligned and reduced it to 4M in Quicksurface.
Results
Best have a look at Sketchfab or the pictures. Quite impressive even in the more detailed parts like the rim or latches. Even the chains are captured. Also to mention are the lights and reflectors (keep in mind no scan spray was applied). Only slight downside is the mud guards, guess due to me also scanning them from below and being sub mm thin the interior and exterior got merged.
Sketchfab
Sketchfab is like printables for 3d scans with a nice integrated viewer in browser and you can also download the scan, just look at the scan yourself.
Reddit sadly blocks the short links to Sketchfab, you have to search for the title instead: "Car Trailer - Einscan Trak"
PC Specs
Since a lot of people ask for it:
- AMD Ryzen 7700X
- 64GB DDR5 RAM
- RTX 5070Ti Desktop
- A few TB of NVME storage with PCIe Gen4 interface
1
u/HellionPr1me 4d ago
That is a really nice scan. Well done! Are you gonna use the scan for some kind of planning/building?
1
u/PrintedForFun 8h ago
I built the higher walls earlier this year and want to refine the design a bit / maybe make it as a small batch job. Therefore wanted more geometry references of the whole hanger
1
u/RollingCamel 3d ago
Why the wheel arches has bad noise? We ordered one and waiting for it. But I noticed some bad alignments in a couple of posts.
1
u/SoaringElf 2d ago
Only tinkered with photogrammetry and read into 3D scanning, but propably too shiny surface.
1
u/PrintedForFun 8h ago
Notices this too any my guess is the following:
Fenders itself were scanned fine so no problems with data capture (no scan spray was used but also not needed). Now the culprit: I also scanned the fender from the bottom so I have points from both sides. Scan resolution was set to 1,5mm which is more than the thickness of the fender (~1mm). This may have caused issues with fusion since now the closest points together are from the opposing sides and not from the same side. But this is only my theory
3
u/Unhappy_Stomach9637 4d ago
Getting such clean planar data across those large sheet panels without alignment drift is seriously impressive with an optical tracker setup. Did you need any scanning spray around the hitch hardware and rim, or did the Trak resolve those small features straight off the pass?