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Filet - Curve

price_cobbprice_cobb Member Posts: 13
Sorry to be a pest and, most assuredly, on such a small project but I persist mainly to learn. Most parts I make go into the restoration of old motorbikes. Since I use a tiny 3D FDM machine, a good print gets turned into metal if warranted either via DMLS printing or old school machining. Anyway I digress.

The other day y'all helped me understand why my attempt at chamfering was not coming out right and have since adapted your suggestions. Many thanks.

But truth is, even my hybrid curve as not right so I copied the actual curve of the part I needed to copy (the curve, not the part itself). My problem is that I need to apply  an action (remove extrude)  to tow adjacent sufaces. Once I've removed the material from one side, there is no longer a surface from which to do the same exact procedure to the connected face.  

Note this is a lot of "hot mess here" in my attempt to show a filet vs a Curve in this application. Note that one end of the part has the desired curve while the other connected side (kind of facing us in the top picture)  has an example after some filet's.  You can also see the circle that depicts the radius I'd like on that side versus the filets you can see.

I've racket my single brain cell on ways to do this but it is obvious my creative sight is limited so am stuck. I even tried to make a chamfer follow a different path but failed miserably.

Any thoughts are appreciated. I've printed useful bits so there is no panic here, but I know the prints can be better if I can draw them better here.

Many thanks for your unending support of hobbyists like myself.  If you don't have time but can steer me to a video, feel free. I just don't have the words to use to find the video I might need. 

I've shared the drawing as well as the link here. Well I think this is the link provided when I clicked on Share with OnShape.


Baring that, here is a copy of the URL at top of page.

All the best, PC


  • Evan_ReeseEvan_Reese Member Posts: 1,981 PRO
    I'm happy to help, but I've read this twice and I'm still not exactly sure what you're after. Can you paraphrase it shorter, and maybe draw on a screenshot or something?
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
  • price_cobbprice_cobb Member Posts: 13
    Evan, thanks. I've been away thus the tardy response.  

    If you look at the part, there are two flat surfaces that I wish to have curved. Initially I did this by chamfering/fileting but I'd still like these two surfaces to have a specific curve and not a combination of chamfers/filets. 

    The real issue is that these two surfaces are not at 90deg to each other so extruding one of the faces is cake, but when I attempt to extrude the other, the face where I draw the curve is not 90 degrees to the face that will have the resulting extrusion, creating a complete hodge-podge of extrusion/removal. 

    Hope that helps? If not, no worries as I'll figure something out even if I stay with the combo method. 
    All the best to each of you as your help is the best.
  • wayne_sauderwayne_sauder Member, Simulation EVP Posts: 369 PRO
    edited September 1
    I'm not sure I totally follow what you want to do but does this give you any ideas? There are lots of different ways to do this. This is only one.  
  • price_cobbprice_cobb Member Posts: 13
    Many thanks for your consideration and sketch

    It looks great and gosh knows that life is easier when the two planes like this are placed at 90 deg to each other but is there a way to do this without those two surfaces being at 90 deg to each other?

    The original drawing has the two planes at 91.549 deg to each other. (Random number generated from my sketch off of the picture.)    Truth is, this difference may not be noticeable so I'll print one as you've drawn and see how it fits the part I sketched this for.

    If there is a way to apply a curve to two faces that are not at 90 to each other as found in this, let me know.  If not, I'll work around it.

    TYVM and sadly, you know I'll be back!  Sincerely, PDC
  • wayne_sauderwayne_sauder Member, Simulation EVP Posts: 369 PRO
    edited September 7
     I'm not sure I follow, I do not see any planes that are at that angle. 
    There are a lot of different ways to do curves so likely what you wish to do is possible. Can you provide a marked-up screenshot or anything to clarify?  
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