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Is there a "fully define sketch" button or option available?

dan_33dan_33 Member Posts: 13
I'm currently working on a drawing and I'm not sure what else I need to do to fully define it without over constraining the part.  I know there's an option in solidworks that allows you to fully define a sketch at a touch of a button but is that available on Onshape (yet)?

Thanks!

Best Answers

Answers

  • cyclonewadecyclonewade OS Professional, Mentor, Developers Posts: 53 ✭✭✭
    edited May 2015
    @jakeramsley   Just deployed the football and went nuclear.
    imagine.create.deliver
  • dan_33dan_33 Member Posts: 13
    I'll try your suggestions and let you know.  Thanks for the speedy response!
  • dan_33dan_33 Member Posts: 13
    UPDATE: Both suggestions worked really well together--  moving around the blue lines to figure out what needed to be constrained and fixing the points.  Thanks, jakeramsley and cyclonewade.
  • traveler_hauptmantraveler_hauptman Member, OS Professional, Mentor, Developers Posts: 419 PRO
    As a side note, blanket fixed constraints like this are a clear indicator that the author did not understand their sketch and probably did not have any big picture in mind. It's a big danger sign for me.

    Not fully defined sketches (which Onshape needs an indicator in the feature tree for) on the other hand are a clear sign that work is not done, which is fine.

    So, better to just leave it undefined in my opinion.
  • andrew_troupandrew_troup Member, Mentor Posts: 1,584 ✭✭✭✭
    I agree with @traveler_hauptman : I long ago resolved, from early misadventures, to use "fix" as a temporary expedient only, or an occasional diagnostic tool.

    (An example of a temporary expedient might be to "pin down" one shared endpoint in a complex sketch to enable swivelling it en masse, in preparation for dimensioning lines which were formerly horizontal and vertical. I'm thinking of a sketch whose design intent has changed since creation, hence the H/V constraints have been deleted and replaced with mutually "Perpendicular" ones)

    Onshape is admittedly a paradigm-shifting app, so I am open to rethink ingrained habits around 'best practice', but I don't think I would ever use it in the shotgun mode suggested here unless it was to lock down an imported profile (not currently possible)

    ... or if I had to get a quick & dirty model out to catch a deadline ... and even then I would go back after the dust had settled and make it good, if there was any prospect of ever revisiting the model.

    I think it's a valid suggestion to break a stalemate for a beginner, but I would suggest you strive to learn how to sketch in ways which define the geometry as you go.

    Another suggestion for a beginner: think about dropping the term "drawing" if what you mean is creating a solid model. Drawing is an optional stage, a way of depicting such a model (usually done when it's finished) on 2D paper or screen ... and that option is not currently implemented in Onshape.
  • allan_gloverallan_glover Member Posts: 1
    I would highly recommend NOT using fixed constraints. Take the time to analyze the sketch and visualize what dimensions are required to fully define each entity
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