Problem with making a handle

[Anonymous]

Hi!

I have problems making a "wave" looking handle(see attached file). tried to use splines and loft but couldn't make it work.

I'm quite new to inventor,Any suggestion on how i can make this.

Thanks

[JDMather]

Extrude Loft and Shell will be the command you want to become familiar with.

Attach the file of what you have been able to complete so far. (*.ipt)

[freegoodkharma]

Many beautiful curves can be made without Splines!

Yours Truly

Carl T.

[Anonymous]

This is what i have done so far(see attached file) and still not right. I just did half of it(and reflect later), is that a good idea?

Carl T: I couldn't open your file, probably because i use the 2012 version. Thank for your help!

[freegoodkharma]

Why for art thou no backward companionability.  It is a pox upon us all.  Here is a peg for you made with regular curves.

Yours truly

Carl T.

[JDMather]

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@freegoodkharma wrote:

 Here is a peg for you made with regular curves.

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The continuity doesn't look very smooth?  Not because of the curves you used (they would be fine used properly) but becuase of the technique you used.

[JDMather]

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@Anonymous wrote:

This is what i have done so far(see attached file) and still not right. I just did half of it(and reflect later), is that a good idea?

---

There is an anomaly in one of your edges because of the way you created the geometry.

I would generally not use Mirror for Loft features (search Google for Ed Eaton Curvy Stuff tutorials for a discussion of problems with this technique (written for a different SW, but the principles are the same.))

I would model the flat section and then Loft to the cut face of the flat - this will give you Tangency control to make a smooth blend.

[freegoodkharma]

Thank you

I was just trying to show that I would not model that with Splines or surfaces, when a simpler technique of lofting and extruding profiles might yield better results.  To add weight to a profile I will use might use multiple profiles, something l started doing with the first 3ds studio.  Is this better or worse?

Yours truly,

Carl T.

[Anonymous]

Could you please show me what you mean with making the flat section and then Loft.

would be most appreciated

[Anonymous]

I agree it was a bit tricky to use spline, couldn't get a good curveture on both sides.

you said that you use regular curves,did you mean an arc? where can i find the same curve that you use

Best regards

[freegoodkharma]

I am sorry I am sorry I forgot that you cannot open my .ipt and when I opened your file it was just a surface that I was unable to do anything with?  I made that part with just circle ellipse and line then trimmed what I could then deleted circles and used arc where circle could not be trimmed.  Then I trimmed some more. Offset the line connected the two curves with line and then Closed loop I am not sure if that is really necessary. Made sketches on planes and lofted. 

Yours truly,

Cart T.

[JDMather]

It will work fine with arcs or with spline if done correctly,  but I am using 2013 and don't have time to do screen captures step-by-step.

Create the flat section.
Loft to edge with tangency.

[freegoodkharma]

There is a good tutorial provided by Autodesk and CadLearning at http://www.autodesk.cadlearning.com/moodle/login/index.php and the surface tutorial is at http://www.autodesk.cadlearning.com/moodle/file.php/78/invs12c0023t0001.html .  

Yours truly

Carl T.