5. 3D Scanning and Printing¶
Assignment
Group assignment:
- Test the design rules for your 3D printer(s)
- Document your work on the group work page and reflect on your individual page what you learned about characteristics of your printer(s)
Individual assignment:
- Design and 3D print an object (small, few cm3, limited by printer time) that could not be easily made subtractively
- 3D scan an object (and optionally print it)
Learning outcomes
- Identify the advantages and limitations of 3D printing
- Apply design methods and production processes to show your understanding of 3D printing.
- Demonstrate how scanning technology can be used to digitize object(s)
Group Assignment
This is a link of this week's group assignment.
Week #5 Group assignment
Individual Assignment
Research
This week, we have to make the object additively and not easily made subtractively.
It was a bit difficult for me to find "almost only" made additively,
so I checked several alumni works and got an idea from this.
I decided to make an object with "hinge" which is really difficult to make subtractively,
and made a hinge part watching this tutorial video.
Make additive object and print it by 3D printer
Design the additive object
I wanted to make a paw shaped box, and
I draw rough image for the design.
I started drawing with Fusion 360.
First I draw outline.
Sketch is extruded and made a shape.
First, I lined baseline and draw 3 circles(for a knucle and pin).
By the way, those are the parts name of hinge
from [ Essentra Components ]
Then, I made lower parts of hinge.
My sketch was drawn on the plane at center, but the sketch in tutorial was drawn on the plane at the end.
As I couldn't find how to move that sketch to another plane(I found later transfer function seems enable to move the sketch plane),
I extruded knuckle part until the whole hinge size and cut pin part.
Whole circle and lower sleeve are selected and extrude until the edge of one part.
(As I sketched circles and sleeve at center, whole shapes are extruded and cut center part)
Then select center smallest circle(pin) and extruded until touching both sides of knuckles.
Next, I made upper part of hinge.
This time I chose outermost circle and second outer circle and extrude both side until 5mm shorter than pin(for making gap).
As my box is paw shape, I wanted to make a lid part more puffy shape.
First I tried to change (or put) mesh on the lid plane, but I couldn't.
I struggled to make "fluffy looking" by fusion.
One of my instructor taught me using offset plane and loft.
When offset plane was made and put the center point on it, lofted from the base plane to the point. The point would be "point tangent".
Then, the lid shape became "fluffy".
After that, I made a hole inside by cutting tool.
Next, Assemble part.
First I made 2 components from bodies.(top and bottom part)
Select Assemble menu ber → joint
[top part(turn off the bottom part)]: Select the center of knuckle(center circle)
[bottom part]: select the pin part.
Then the top part can be rotated by the center anchor.
Preparation for 3D printing.
Open the lid
And export file(stl.file) to transfer data to the 3D printer.
Print it by 3D printer
I use bamboo printer(Bamboo P1S) for printing.
| Item | Specification |
|---|---|
| Size(W × D × H) | 256 x 256 x 256 mm³ |
| Chassis | Steel |
| Hot End | All-Metal |
| Extruder Gears | Steel |
| Max Hot End Temperature | 300℃ |
| Nozzle Diameter (Included) | 0.4 mm |
| Nozzle Diameter (Optional) | 0.2 mm, 0.6 mm,0.8 mm |
| Max Speed of Toolhead | 500 mm/s |
| Max Acceleration of Toolhead | 20 m/s |
| Supported Filament | PLA, PETG, TPU, ABS , ASA , PVA, PET |
| (capable)PA, PC | |
| (Not Recommended)Carbon/Glass Fiber Reinforced Polymer | |
| Connectivity | Wi-Fi, Bluetooth, Bambu-Bus |
| Storage | Micro SD Card |
| Slicer | Bambu Studio Support third party slicers which export standard G-code such as Superslicer, Prusaslicer and Cura, but certain advanced features may not be supported. |
I use bamboo studio for preparation.
Open Bamboo Studio and import my data.
object is appeared in standing position and rotated into lid upper position.
Set for the printing.
Select the filament and fill type to "gyroid".
I also selected supports are on, and it's space is 5mm.
Fortunately, only one print is needed!
3D Scanning
We used "Miraco Plus 3D scanner(Revopoint)".
spec is as follows;
| Item | Specification |
|---|---|
| Photogrammetric Accuracy | 0.02 mm + 0.05 mm × L (m). L is the maximum measuring distance in meters |
| RAM | 32 GB |
| Storage | 256GB |
| Precision | Up to 0.02 mm |
| Single Capture Area(Max) | 975 x 775 @ 1000 mm |
| Single Capture Area(Min) | 28 x 53 mm at 100 mm |
| Working Distance | 100 ~ 1000mm |
| Working Distance | 100 ~ 1000mm |
| Scan Speed | up to 20 fps |
| Scanner Weight | 750g |
| Dimensions | 200 x 50 x 110 mm |
| Battery | Internal 5000 mAH |
| Output Formats | PLY, OBJ, STL, ASC, 3MF, GLTF and FBX |
We scanned each other in term and we found several things.
-
this machine is week at catching black color.
Black part becomes transparent. - We have to scan several times while changing the angle not to miss the spot.
-
Scanning distance and speed are very important.
What I've learned
First of all, I was a bit moved when I watched the 3D printer produced exactly what I designed.
It seemed really difficult to think about making additive object,
especially to understand what is not possible or really hard made substractively.
After taking global and local session, I got an idea and could make it.
While making hinge part, I could understand the structure of hinge and how to efficiently make it.
For 3D scanning, it was surprised that the scanner we used was not good at scanning black thing,
because all of our head became transparent at first.
As we covered our hair with scarf, we could scanned us successfully.
(One of the instructors told that it depended on the machine at Asia review)