I have CAD and a 3D printer

Discussion in 'Scratch Built' started by dr wogz, Apr 5, 2018.

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  1. Jul 19, 2018 #31

    djkingsley

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    There is also a binary form for STL files, changing the extension and uploading as ASCII will corrupt the file.
     
  2. Jul 19, 2018 #32

    cwbullet

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    You can now upload STL files.
     
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  3. Jul 19, 2018 #33

    SteveThatcher

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    looks nice. That will make for a sharp rocket on the pad...
     
  4. Jul 20, 2018 #34

    vcp

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    Cool. Quick work!
     
  5. Jul 20, 2018 #35

    cwbullet

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    Here is a test
     

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  6. Jul 20, 2018 #36

    cwbullet

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    I have two questions:

    1. I might post a 3d show off thread. Where would you put it? Software? Gallery?
    2. Anybody interested in a contest? I would make some rules like you must post an image of the final product and the STL file.
     
  7. Jul 20, 2018 #37

    OverTheTop

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    Good idea, but what if we don't have STL files? I don't. Some of us just have some other format like the CAD program generates? Say SolidWorks SLDPRT files?
     
  8. Jul 20, 2018 #38

    cwbullet

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    In Solidworks: Go to save as, in the "save as type" drop down menu you will find ".STL" format. I am ok with other format but SLT is a more universal format. If I am wrong, let me know.
     
  9. Jul 20, 2018 #39

    OverTheTop

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    Thanks for that. I'll give it a go sometime this weekend if I get to it.

    Or "Plans", or "Scratch Built", or "Techniques"...

    Way too many choices :)
     
  10. Jul 20, 2018 #40

    dr wogz

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    IGES files would be a 2nd source. used to be a fairly standard 'generic' 3D "CAD" file type..

    Maybe, if we're looking to allow an 'STL' file type, we may want to allow a few native CAD file types; Fusion360, Solidworks, Creo, Rhino, Inventor, etc..
     
  11. Jul 20, 2018 #41

    cwbullet

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    I will research file types. I went with STL files because most 3d printers I have reviewed will print them.
     
  12. Jul 25, 2018 #42

    Landru

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    If I want to maximize utility, I always upload .stl, .iges, and whatever the native CAD format was.

    .stl's are hard to edit easily because they don't have true flat/round surfaces to edit off of, and tend to be very large and complicated to import well into things like inventor and solidworks.
    .iges is better because you have "real" geometry but you still have no feature history.
    Native format is good because you have a design history to work with, and complex changes can be extremely fast and easy. Downside is compatibility with other programs...
     
  13. Jul 25, 2018 #43

    cwbullet

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    What type of file is .iges? Text? I can ask. For safety and security, we cannot open this up to all files.
     
  14. Jul 25, 2018 #44

    Landru

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    It is a text file, and I just verified the extension as .igs, though the file is called "IGES"
     
  15. Jul 25, 2018 #45

    vcp

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    And then there's STEP. Direct competitor to IGES, but newer. Supposedly has better features and greater compatibility, but I have no direct experience with it. I just gave it a try, and as I expected, my Solidworks license has run out. I'll get it renewed, but that'll be a few weeks. (Solidworks veterans program).
     
  16. Jul 25, 2018 #46

    cwbullet

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    I see they give the discount to active duty also. I will have to buy a copy.
     
  17. Jul 25, 2018 #47

    cwbullet

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    What programs use IGS?
     
  18. Jul 25, 2018 #48

    dr wogz

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    IGES is (was) like a PDF to the CAD world.. easily share geometry with what ever 3D modeller (CAD) you use.. all CAD systems should be able to import & export to IGES, STEP, STL, as well as DWG or DXF for 2D stuff..

    those 3 should be a minimum..
     
  19. Jul 26, 2018 #49

    soopirV

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    Anyone have any photos of the multi-part nose cone printed? I"m trying to envision how that would work, and am stuck...
     
  20. Jul 27, 2018 #50

    dr wogz

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    What do you mean? a NC that's made up of several pieces? (A large NC split up to fit into pieces to fit onto a small print bed?)
     
  21. Jul 27, 2018 #51

    soopirV

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    Yes, precisely.
     
  22. Jul 27, 2018 #52

    OverTheTop

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  23. Aug 6, 2018 #53

    Brainlord Mesomorph

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    I bought a cheap ABS printer a couple of years ago.
    It took a lot of acetone and sanding but I could eventually I could get a nice glass-like finish.
    Now two years later, its cracking an delaminating.

    Maybe the tech is better now, but don't be surprised if 3d printed stuff doesn't last.
     
  24. Aug 6, 2018 #54

    SteveThatcher

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    It actually doesn't have a lot to do about improving tech except materials. It is all about layer thickness, extrusion temperature, extrusion amount, and cooling while printing. You mentioned a cheap ABS printer. If the printer was not enclosed for example, then the abs would have cooled too quickly between layers and that would lead to delamination later. If the amount of extruded material was less than needed in a layer, then if might not adhere to the previous layer properly. Lots of variables... ABS is actually one of the more difficult materials to print with (unless you are talking about exotic types like polycarbonate). When I started 3d printing, I only printed in ABS, but I had an enclosed printer and I went through a lot of material before I got it right. Since then, I have printed a lot of parts in PLA and now I everything I do is PETG.
     
    Last edited: Aug 6, 2018
  25. Aug 6, 2018 #55

    cwbullet

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  26. Aug 6, 2018 #56

    cwbullet

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    Asked for IGS, IGES, and STEP to be added.
     
  27. Aug 6, 2018 #57

    OverTheTop

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    Saw that. Will do, but not sure when. Time is in short supply currently. I will get the 4" files out there as well. They take the same sled.
     
  28. Aug 8, 2018 #58

    cwbullet

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    IGS, IGES, and STEP have been added.
     
  29. Aug 11, 2018 #59

    Reinhard

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    Thanks! One of the nice things of STEP is, that it allows assemblies too. Heres a test (and what keeps me busy during these days).

    Reinhard
     

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  30. Oct 30, 2018 #60

    dr wogz

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    Sorry Bobby, completely missed this post!

    I use CREO by PTC. You might have heard it as it's other (older) name: "PRO Engineer"

    it's the next level after Solidworks & Inventor / Fusion3D. It's on par with Catia.. very steep learning curve, very rigid..
     

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