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surfacing help

daniel_wesemandaniel_weseman Member Posts: 19 PRO

I am new to surfacing and having trouble get nice surfaces. In this example it has a weird crease at the aft end. In the OS tutorial the functions seem to work perfectly , almost magic. For me it has been a struggle. I don't know what I don't know… so any advice is welcome!

https://cad.onshape.com/documents/73e643366a2364aba1eeb5b0/w/a63daa222a346b5acf9d554b/e/224f6432d01bf67435f12b0d

here is the document I am trying to surface. it has a weird ripple along the aft end.

Answers

  • SMURFCADSMURFCAD Member Posts: 54

    Daniel,

    You have curve segments that are very different between the start and end, the result is some weird geometry. OS is lofting between the short (left circle) and long (lower right circle) segments. Then next it has a starting long segment and a real short segment.

    image.png

    There's lots of different way to fix this depending on exactly what you're trying to do (and skill level), try:

    -break up the long line by adding a line segment the same width as the start. Break up the long curve so you have a short curve segment on the left.

    -or use only two splines at start and two splines at end.

    I would typically loft the top surface independent of the bottom. Easier to work with. If you're still struggling, hit me up and I'll help you.

    -S

  • daniel_wesemandaniel_weseman Member Posts: 19 PRO

    Thank you for the help! I broke up the "long lines" on the right, it it helped a lot. Im still playing with it to try and get the edges of the lofts and fill to blend a little better.

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