6. 3D Scanning and printing

In this week I will be working on 3 main projects

  1. Indivdual Projects
    • To design and 3D print Object that has the following specifications:
      • Undercut
      • Overhang
      • has nested parts
  2. Group Assignment
    • To test the design rule of the 3d printers

Theoretical Aspects

by conducting a small reasearch I found these useful images that can illustrate the difference between subtractive manufactoring and additive manufacturing:

what I mean with undercut and overhang:

3D Printing Technologies:

and from the 3d printing workshop that was conducted on the lab by the Engineer Loay AlKooheji I have learned the following: - Continuous Liquid Interface Production (CLIP)

  • Selective Laser Melting (SLM)

  • Binder Jetting

  • Stereolithography (SLA)

  • Digital Light Processing (DLP)

  • Fused Deposition Modelling (FDM)

3D Printer Limitation

  • Bed Size

  • Heated Bed

  • Nozzle Size

  • Layer Height

  • Printing Temprature

Slicer Properties

  • Infill Percentage

  • Infill Type

  • Shells

  • Orientation

Design and 3D print an object

for this task, I thought about printing my version 1 of my robot that I have designed in week3. this design can only be fabricated by 3d printers as it has undercuts, overhang, and nested parts and all of those sepecifications cannot be done subtractively by cnc machines or fine milling machines or laser cutters So this was the final outcome: as I have adjested the design by making the hand and neck thicker:

I faced a minor problem on saving files as I made the robot with some parts and then assembled them together so when I tried to save the file as stl, all parts saved individually so I googled the problem and I found out that when I select save as stl, an option button will be displayed so by clicking on I have to select :

By using Slic3r Prusa Software

Printer’s Settings

Changed the properties based on the material and the printer we have in the lab as well as the desired outcome:

and then I clicked on slice now and this was the result:

the result

the result was accceptable however the balljoints of the arms didnt work well and it turned out that I have scaled it very small

so I decided to scale it bigger and try again and this was the final result

Scanning an object

for this part I have done it by using QLONE app on my iphone and by following the guide of the app

lets start first with what is Qlone

and this video explain how to use Qlone:

you can download the application through this website Qlone

and if you have an iphone you can search on the app store for Qlone and you will find it

this is the result

Group Assignment

Link to the Group Assignment

Downloads