6. 3D Scanning and printing

Due 2024/02/27

How to use this document

Please refer to instructions in the week02 weblog entry

Conceive

1. This week we focus on additive printing and 3D scanning.
2. Additive printing is like making a mound of toothpaste on the counter top by squeezing some of it out of a tube.

Assignments

To do	Done
Group assignment: 3D-scanning and printing	⬇
Test the design rules for your 3D printer(s).	Yes
Document your work on the group work page and reflect on your individual page what you learned about characteristics of your printer(s).	Yes
Individual assignment:	⬇
Design and 3D print an object (small, few cm3, limited by printer time) that could not be easily made subtractively.	Yes
3D scan an object (and optionally print it)	Yes

Learning outcomes

To do	Done
Identify the advantages and limitations of 3D printing.	No
Apply design methods and production processes to show your understanding of 3D printing.	No
Demonstrate how scanning technology can be used to digitize object(s).	No

Checklist questions

Have you?	Done
Linked to the group assignment page?	Yes
Explained what you learned from testing the 3D printers?	No
Documented how you designed and 3D printed your object and explained why it could not be easily made subtractively?	No
Documented how you scanned an object?	Yes
Included your original design files for 3D printing files?	No
Included hero shots of your results?	Yes

*rebase

octopi v9 files Fusion 360, STL

1. 3D scan an object, try to prepare it for printing (and optionally print it)

Context

1. Syllabus FAW06
2. Assessment FAW06
3. Tutorial FAW06
4. Video FAW06
5. Review FAW06
6. FabAcademy 2021 Documents
7. FabAcademy Home Page
8. FabLabs Home Page

Comprehend

1. 3D printing happens when a machine makes parts from a file by forcing plastic or other material that it melts and forces through a hole.
2. Prusa i3 MK3
   1. Form(durability, rigidity, stability)
      1. Y axis aluminum extrusion sub frame rigidity and stability
      2. PETG, 3D printed frame parts add durability
      3. Magnesium heat bed adds rigidity
      4. Smooth rods installed parallel to leadscrews* in x and z axes add rigidity.
      5. https://help.prusa3d.com/en/guide/3-x-axis-assembly_27464
      6. https://shop.prusa3d.com/en/prusament/802-prusament-petg-jet-black-1kg.html?search_query=petg&results=21
      7. https://blog.prusaprinters.org/original-prusa-i3-mk3-bloody-smart_7201/#_ga=2.58250346.1371284772.1590970192-1540439993.1590970192
   2. Function (efficiency, reliability, accuracy)
      1. Stepper motors allow accurate movement in CNC actions.
      2. PEI build surface for print reliability
      3. Leadscrews for print accuracy
      4. Skewed axes compensation accuracy
      5. Feed rate efficiency
      6. Spindle speed efficiency
      7. Resolution accuracy
      8. Build volume capacity
      9. Optical sensor for more reliable filament detection
      10. Power Panic makes printing more efficient by reducing print restarts.
      11. https://reprap.org/wiki/PEI_build_surface
3. 3D laser scanning happens when a sensor detects laser light reflected from the surface of an object
   1. https://www.engineering.com/AdvancedManufacturing/ArticleID/12390/Quality-Basics-How-Does-3D-Laser-Scanning-Work.aspx

Take Caution

1. Human
2. Machine
3. Environment

Calibrate

Control

1. Material-machine interface
   1. Materials
   2. Fixtures
   3. Tools
2. Machine-controller interface
3. Controller-CAM interface
4. CAM-design interface
5. Design-human interface
6. Group assignment
   1. Test the design rules for your printer(s)
   2. Document your work and explain what are the limits of your printer(s) (in a group or individually)

Create

1. Human-science interface
2. Human-industry interface
3. Human-art interface
4. What assumptions can we break?
5. Individual assignment
   1. Design and 3D print an object (small, few cm^3, limited by printer time) that could not be easily made using subtractive methods.
   2. 3D scan an object, try to prepare it for printing (and optionally print it)