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Printable Fillets

I made a custom feature to easily implement printable fillets, aka fillets that have a slightly sharper transition to the faces than a standard tangential fillet, to enable more accurate 3D printing. This is my first attempt at something like this, and constructive feedback is very welcome. https://cad.onshape.com/documents/643eceb32d9650249dd16a3e/w/78be64c6d1a48ea091dd93cb/e/16321f49c31ef6b8038a0f53

Comments

  • MichaelPascoeMichaelPascoe Member Posts: 2,826 PRO
    edited September 2025

    Nice job! And welcome to the FS club 😎

    The code looks pretty clean, well documented with comments too.

    Feedback: As far as the feature itself goes, it's pretty good. Not sure I would change much.
    Something to note, the default Fillet tool can already do conic fillets which will give you the same result i think?

    image.png

    RENDERCAD
    rendercad.ai - Photorealistic product rendering.

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  • janna_deeble685janna_deeble685 Member Posts: 4

    Thank you for being so gracious while telling me I have recreated an existing feature 😂. When i started the process I had a rounded chamfer in mind, and then iterated towards the conic radius, forgetting it was easy to implement in other ways. Never mind, good practice!

  • MichaelPascoeMichaelPascoe Member Posts: 2,826 PRO
    edited September 2025

    All of us FS devs have unintentionally re-created an already existing feature at one point or another. I think I've done it a few times. Its just so hard to find custom features, even for experienced users.


    RENDERCAD
    rendercad.ai - Photorealistic product rendering.

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  • EvanReeseEvanReese Member, Mentor Posts: 2,884 PRO

    @janna_deeble685 When I read the thread title I thought you were headed here with it, which might still be a decent custom feature! I used the chamfer to control the max overhang angle, then rounded it off.

    Sep-23-2025 11-47-09.gif
    Evan Reese
    The Onsherpa | Reach peak Onshape productivity
    www.theonsherpa.com
  • Derek_Van_Allen_BDDerek_Van_Allen_BD Member Posts: 900 PRO

    My team would get some use out of a "chamlet" feature. They keep doing the chamfer and fillet step manually and manually playing with the dimensions every time, it should just be one feature.

  • EvanReeseEvanReese Member, Mentor Posts: 2,884 PRO

    I don't know why, but "chamlet" feels like it should be Old English… 𝔜𝔈 𝔒𝔏𝔇𝔈 ℭℌ𝔄𝔐𝔏𝔈𝔗

    Evan Reese
    The Onsherpa | Reach peak Onshape productivity
    www.theonsherpa.com
  • jelte_steur_infojelte_steur_info Member Posts: 660 PRO

    I would expect something like this for a Chamlet definition:
    Overhang angle and Fillet Radius definition…

    image.png
  • Derek_Van_Allen_BDDerek_Van_Allen_BD Member Posts: 900 PRO

    Personally I prefer the cleaner look of a circular profile that gets truncated like @EvanReese's example. In woodworking I think they call it a thumbnail profile? Stacking a fillet and chamfer like the method you show tends to look overly tall to me.

  • MDesignMDesign Member Posts: 1,348 PRO

    5 axis 3d printing will fix this. 😉

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