Amir Lazarovich

Project mini hoverboard and 3D scanned flower

This was an exciting week, we had the chance to learn about the printers of tomorrow, play with thousands of dollars equipment and a million dollar high-res scanner, 3d scan anything we wanted, design a 3d model with interior parts (just to make it more complicated) and 3d print it! dreams do come true

That's not all, there was an extra-credit task. Build a 3d scanner. In one week. While you have other projects from different courses and a research project. I know someone will do it! If only my entire focus was devoted to this course..

Class notes:

- Build supports for the model so it won't fall
- Materials with colors have bad mechanical characteristics (not all right?)
- Check the resolution you can work with so the parts won't stick to each other
- 45 degree is good, don't try more than that to be on the safe side
- The model has to be watertight (isn't missing a triangle in the design)
- .STL files lack measurement units
- Don't ever use .DXF
- MeshLab - good and free .STL editor tool (crashes a lot so save frequently)

How to work with the Minolta scanner:

- Make at least 4 scans to catch the object from all angles
- Remove the bottom cap that covers the lens
- After turning the machine on, press on any key to start
- The software you should use is Geomagic Studio 10
- Select plugins-[first option]
- Don't calibrate the axis initially, we'll do that later
- Select "show live window image" - this will show you what the scanner sees
- Mark "enable streaming video" - to get live feeds from the scanner
- Place the white walls at the center of the rotating plane
- Unselect "show live window image" to enable both buttons
- [no need to do that all the time] Select "update color"
- Select "update range and color image" - to see the near/far distribution
- If it looks good (nice yellow/red-ish tone), continue
- Calibrate the axis - if it didn't work, change the focus manually
- Now, place the model right at the center and tune its range and color image
- When finished, scan it in all directions (90 degrees is good enough)
- Set "scan mode" on "multiShot" to click on "next" for continuous scans

After you finish all scans, you should merge all separated scans (points-merge), fix the polygon by cleaning, reducing noise, relaxing, flatting and filling holes using the tools from the "polygon" menu. Always use bridges (another tool nested in fill-holes) to separate large holes, otherwise it might take a long time for the computer to compute.

How to work with the Replicator2 3d printer:

- Make sure the filament doesn't stick - utilities-change filament-load
- Load the .STL file on "makeware software", fix it if necessary and "make" it
- We use PLA material
- Adding "raft" creates a surface which is good
- Adding "support" is important for curved objects
- Save the file on the sdcard (the one that you took from the 3d printer)

If its not working, utilities - change filament - unload. Take the filament out - if you can't there's a lever on the side that make it stick, and then insert it again. Don't forget to utilities - change filament - load again

I had some problems

I had to change the focus and intensity a lot in order to see the fine curves on the flower. I ended up using distance 670 and laser power 10.

When I tried to scan the propeller I had to move the scanner back and had troubles with the axis calibration. I had to turn off the lamp so it will work.

I tried calibrating the axis but it didn't work until I set the auto focus and intensity.

I forgot to merge two meshes and I ended up with a really bad bottom for my flower since the letters pushed it a bit upwards.

3D design | 3D scanner | 3D printer