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PolyU Library

i-Space: 3D Printer

Consisting of the Digital Makerspace, Digital Visualisation Room and Studios

3D Printing

3D Printing is the process of constructing a physical object from a digital 3D model, where the object is built by laying down the raw material layer by layer. This adding up of layers gives 3D printing its alternative name – additive manufacturing. The technology has penetrated widely across different sectors including manufacturing, construction, healthcare, art, heritage restoration, etc. 3D printing service is available at i-Space and below are some resources for you to know the basic workflow of 3D printing. 

3D Printing Facilities & Software

Equipment Details Location

iBooking 3D Printer

Raise3D E2

Raise3D Pro3

Fused Filament Fabrication (FFF) 3D Printer

  • Build Volume:
    • 330 x 240 x 240 mm³ (WHD) - Raise3D E2
    • 300 x 300 x 300 mm³ (WHD) - Raise3D Pro3
  • Filament
    • Diameter: 1.75 mm
    • Nozzle Diameter: 0.4 mm
    • Supported: PLA (White)
  • Temperature
    • Hot End : Max 300 ℃
    • Build Plate: Max 110℃ - Raise3D E2
    • Build Plate: Max 120℃ - Raise3D Pro3
  • Speed
    • Toolhead: Max 150 mm/s
  • Compatible with Win/Mac/Linux
  • Came with software: ideaMaker
  • Support

Digital Makerspace,
i-Space, 4/F North Wing


Base charge HK$20 plus material charge at HK$1/gram.

For example, a printed model weighing 10 grams will cost HK$30. ($20 base charge + $10 materials charge)

Walk-in self-service Colour 3D Printer

Bambu Lab X1E

User-friendly Colour 3D Printer with Automatic Material System (AMS)

  • Build Volume: 256 x 256 x 256 mm³ (WHD)
  • Filament
    • Diameter: 1.75 mm
    • Nozzle Diameter: 0.4 mm
    • Supported: PLA
      (White / Gray / Black / Sliver / Red / Yellow / Blue / Green)
  • Temperature
    • Hot End : Max 320 ℃
    • Build Plate: Max 110℃
    • Active chamber heating: Max. 60℃
  • Speed
    • Toolhead: Max 500 mm/s
  • Compatible with Win/Mac
  • Came with software: Bambu Studio
  • Support

Digital Visualisation Room
i-Space, 4/F North Wing
(Connected to the Laptop PC)

Only available for users who attended relevant i-Space consultation; Or those who have prior experience in using FDM printing.

Before printing, please follow the instructions on the attached laptop to log in and log out after use.

Free of charge in the trial run period until further notice.

Basic Workflow of 3D Printing

 •  Create a 3D model

To begin, you need to have a 3D model first. You can either create one with 3D modeling software or 3D scanning tools. The following 3D modeling software is available at i-Space.

SketchUp 3ds Max
SketchUp Pro Blender 3ds Max

 

There are also some free tools to create 3D models, such as SketchUp FREE, Tinkercad and Fusion 360. If you don't know how to create your own model, you may download one from free 3D model repositories such as Thingiverse and Grabcad Library. Most of their models are 3D printing ready and are provided under Creative Commons licenses or royalty-free license.


 •  Check & repair mesh errors on the model

For successful 3D printing, your model must be free from mesh errors like holes between meshes, intersecting / disconnected meshes, meshes with flipped normal, etc. These errors will give you unexpected printing result or the model cannot be printed at all. You can use the following free software to check & repair mesh errors.

3D Builder
Microsoft 3D Tools Microsoft 3D Builder MeshLab Autodesk Meshmixer

 

Apart from fixing errors, these tools also help to optimise your model by:

  • remeshing the 3D model to make slicing easier
  • flattening the bottom of the model to achieve better platform adherence
  • hollowing out solid shapes to reduce material use & printing time
  • thickening thin parts & make them less easy to break

 •  3D printing

Next, you can import the error-free model into a slicer software* to generate printing instructions for a 3D printer. The instructions typically include printing speed, layer height, parameters for support structure & infill pattern. The instructions are then sent to the 3D printer to print the object layer by layer.

(* Most 3D printers come along with their own slicing software.)


 •  Post-processing

Most 3D printed objects require some sort of post-processing, at least, removing support structures. Depending on what type of 3D printer you used and your requirements on the surface quality, other post-processing may include:

  • UV curing of material
  • sanding / polishing the surface
  • painting / electroplating

3DPrinting@Library


 

3D Printing & Modeling Books

Online 3D Model Collection