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trying to control the curvature of loft

h_d240h_d240 Member Posts: 5 EDU
Hi, I'm trying to control the curvature between two curves. I'm using a sketch in between for guide but it is not working out for me. Thanks in advance.

Best Answer

  • Evan_ReeseEvan_Reese Member Posts: 887 PRO
    Accepted Answer
    If I mouse over the failing loft feature, I see this error message

    that means that the guide isn't exactly on the loft profile curve, even though it looks like it. Sometimes it could even be due to the tolerance limits of the CAD system (it's not infinitely precise). To fix it, make sure to use the "pierce" constraint in the sketch between the curve end points and the loft profiles. That fixes it.


    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
    Instagram: @evan.reese.designs

Answers

  • John_P_DesiletsJohn_P_Desilets Onshape Employees Posts: 141
    @h_d240 Can you please share your document as public and post the link here. 
  • Evan_ReeseEvan_Reese Member Posts: 887 PRO
    I wonder if your issue with the loft may be that the curves don't meet at the back, which also makes me wonder if the curves actually intersect other places too, or if they just look close. Check for a pierce constraint at each end in your guide curve sketch. Here's my hack at something similar real quick. I used Freeform Spline for the guides to test it out, but sketches could work just as well for the cross sections.

    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
    Instagram: @evan.reese.designs
  • h_d240h_d240 Member Posts: 5 EDU
    @Evan_Reese thanks a lot, it was super helpful but as I'm not expert, I'm unable to define the curve at heel section. I'm attaching public doc. Thanks in advance.
    ghg | Part Studio 3 (onshape.com)
  • Evan_ReeseEvan_Reese Member Posts: 887 PRO
    Accepted Answer
    If I mouse over the failing loft feature, I see this error message

    that means that the guide isn't exactly on the loft profile curve, even though it looks like it. Sometimes it could even be due to the tolerance limits of the CAD system (it's not infinitely precise). To fix it, make sure to use the "pierce" constraint in the sketch between the curve end points and the loft profiles. That fixes it.


    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
    Instagram: @evan.reese.designs
  • h_d240h_d240 Member Posts: 5 EDU
    thanks a lot @Evan_Reese
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