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FAQ - RP Space

Q: I am interested in your 3D printing service, what do I need to do?

  • First of all, you need to save your 3D model in STL file format.
  • After that, fill in our 3D printing service order form and we will reply you with our quotation.
  • For more information regarding our 3D printing service, you may refer to this link.


Q: But I do not know 3D modelling, how should I get STL files?


Q: What is the maximum size of the 3D model that I can print?

  • Our 3D printer has a maximum printable volume of 250mm*210mm*210mm.
  • If your model exceeds these dimensions, feel free to email us at service@rpspace3d.com to discuss. We might be able to print your 3D model in separate pieces and join them back after printing.
Our Maximum Printable Volume


Q: What is the material used to print my parts?

  • The material used is ASA (Acrylonitrile Styrene Acrylate).
  • ASA is a material with high impact resistance, temperature resistance and UV resistance.
  • ASA is great for outdoor applications, or applications where good mechanical properties are needed.


Q: What is Part Infill?

  • Infill percentage is the amount of material inside your 3D printed parts.
  • The denser the infill, the stronger your parts.
3D Printed Part Infill
Examples of cross section of cubes with different Part Infill
(Standard-Left, Dense-Middle, Solid-Right)


Q: What is the recommended Infill Percentage for my part?

As a general guideline

  • Loose Infill is suitable for display models which do not experience any impact.
  • Dense Infill if your parts may experience some impact.
  • Solid Infill is not recommended unless necessary.

(Solid infill will add a lot of cost with little increase in strength. Sometimes, it may also cause surface quality and dimensional accuracy to suffer.)

 

Note: Do not use 3D printed parts which, if it fails, will cause danger, such as a mountain climbing hook. We do not want you to risk any lives. Therefore, we reserve the right to reject your print(s) if it was found to be used for dangerous applications.


Q: How much clearance is required for my parts to fit together?

  • You can refer to the following guide for the clearance required for difference types of fitting.
    • Loose Fit (0.35mm clearance)
    • Snug Fit (0.25mm clearance)


Q: Are there any design considerations when designing for 3D printing?

Yes, there are two which you may take note.

 

1. Thin Sections
  • Firstly, try to ensure the thinnest section of your 3D model is at least 1.2mm thick. This is due to the limitations of FDM 3D printing where anything below 1.2mm may cause your part to be weak at that particular area.
  • We recommend 2.0mm minimum thickness for PLA because thin sections for PLA may warp when the parts are being shipped to you.
Original Print (Left) and Warped Print (Right)
  • You can also contact us if you are not sure that your 3D model satisfy the minimum requirement, we will check it for you.

 

2. Chamfers and Fillets
  • Next, we recommend adding chamfers and fillets on any possible stress concentration areas.
  • Since 3D printed parts are manufactured layer by layer, the parts tend to be weaker in the direction parallel to the layer lines. Therefore, we suggest using chamfers and fillets to increase its strength.
  • You may also discuss with us such that we can print your parts in an orientation which allows it to bear more load in a specific direction.
Failure Along Layer Line at Stress Concentration Area
Add Chamfer (Left) or Fillet (Right) to Increase Strength


Q: Are the printed parts food safe?

  • No, please do not use the printed parts to come in contact with any food.
  • This is because printed parts are manufactured layer by layer, which tends to cause bacteria to build up in between those layers.
  • Therefore, do not let our 3D printed parts come in contact with any food. (Yes, you can still print fork and spoon, but promise us do not use them.)