3D Printing design rules

Testing the design rules of our printers in Fablab Barcelona



TEST FILE


  • File
  • About

  • We've downloaded a standard test on Thingiverse and printed one. We discussed several points to look for when printing and how to solve some of the problems.

    The general idea was use same test file in diferents machines with diferents settings, in order to compare the results.

    This is the test list and what we can conclude from it:



    Parameters to check:
  • Size: the object is 4 x 50 x 50 mm (baseplate) — measure with a caliper
  • Hole size: 3 holes (3/4/5mm) — measure with a caliper/drill
  • Nut size: M4 nut should fit perfectly — insert an M4 nut; it should need a little pressure
  • Fine details: pyramid, cone, all numbers — check if all things look nice and smooth
  • Rounded print: wave, half sphere — check if all things look nice and smooth (not every printer handles round things similar, e.g, it will be split in polygons) see here for more details
  • Minimum distance between walls: 0.1/0.2/0.3/0.4/0.5 mm — depending on your nozzle size and slicer settings you will get different results
  • Overhang: 25°/30°/35°/40°/45° — depending on printed material/cooling, these will not be as seen on the rendering provided
  • Flatness: all flat areas — these should be flat with no gaps


  • Warping

    When the corners of the print start to bend. Here are a couple of the methods to reduce the warping effect



    In Fill

    Reducing the in fill(different sizes and patterns) the less dense the model gets (Choose different sizes and patterns, the hexagonal ones take longer not recommended)



    Pads

    Reduce wall thickness. Create pads int he corners of your model



    Brim

    Brim - good to maintain the model on bed



    Raft

    Raft - only good for model ta touch little the bed



    Retraction

    Heat platform of printer

    Hairspray is very good to stick models in the printers bed especially heated ones (take glass and spray, good for 5 prints)







    REPRAP BCN+


  • Webside
  • Fablabbcn Wiki - We can find Technical specifications, and step by step guide of how to set up the machine.




  • Test with Nozzel 0.6mm
  • ReprRap profile nozzel 0.6mm



  • Test with Nozzel 0.4mm
  • ReprRap profile nozzel 0.4mm







  • PRUSA I3


  • Webside
  • Fablabbcn Wiki - We can find Technical specifications, and step by step guide of how to set up the machine.




  • Test with Nozzel 0.3mm
  • Prusa profile nozzel 0.3mm








  • LOCAL INSTRUCTORS


    Santi Fuentemilla
    Xavi Dominguez

    ASSISTANCE INSTRUCTORS


    Citlali Hernández
    Esteban Gimenez
    Arnau Tasies

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