Surfaces tutorial help 1

[solid34works]

Hi,
I was going through the solid work online tutorial help. There is one tutorial call "surfaces" where one nozzle is created.
The problem is that when I sketch it from scratch I can not create the Nozzle grip and "exit nozzle" profile as it is written in the tutorial( by surface sweep).
If I start from solidworks' sketch then everything works fine.
I am just wondering what is the thing that I am doing wrong.
I can sweep the surface but the profile is not like in the tutorial.

Any help is much appreciated.

Thanks,

 

[JMirisola]

Can you post a file using these instructions:

http://www.eng-tips.com/faqs.cfm?fid=1177

Jeff Mirisola, CSWP
CAD Administrator
SW '07 SP2.0, Dell M90, Intel 2 Duo Core, 2GB RAM, nVidia 2500M

http://designsmarter.typepad.com/jeffs_blog

 

[CorBlimeyLimey]

Check that all your sketches match the tutorial sketches, and that all geometry endpoints intersect or pierce correctly with the relevant geometry.

 

[Theophilus]

I'm guessing CorBlimeyLimey is right about adding the Pierce relationship to your guide curve sketch (you need two sketches--guide curve and profile). The Pierce relationship tells the profile where/how to interact with your guide to form the geometry you need. Since it's a relation within the sketch, it easily goes un-noticed when learning to do this sort of thing.



Jeff Mowry

http://www.industrialdesignhaus.com

Reason trumps all. And awe transcends reason.

 

[solid34works]

Hi,
I tried to check all the geometry sketches with the tutorial sketches. It seems the sketches are same.

Mirsola,
Here is the link I uploaded my part model.

http://www.yourfilelink.com/get.php?fid=358744

I have named it "hammer". It's inclomplete. Look at the left hand sweep portion. I tried to sweep the elliptical(ellipse) edges along the path and followed the curve.
But in the tutorial sketch when I do the same it makes a little different(top of the sweep is flat and bottom portion is curvy).
Here I am uploading one sketch from the tutorial also.

http://www.yourfilelink.com/get.php?fid=358749

Thank you so much for your help.
Regards,

 

[CorBlimeyLimey]

There is something weird with your "hammer" part. It does not behave as expected. If I re-create the tutorial in a new part, it works fine.

Also, you are missing the path and guide curve for the exit nozzle portion.

Try creating a new part template from the tutorial part, and then recreating the nozzle using the new template.

 

[solid34works]

Hi,
I found out the problem. Actually it's not a problem its a trick.
I had to first sketch the path and guiding curve first then the profile.
This is a little trick but nowhere it is mentioned in the tutorial.
I still do not understand why it is like that.

Thanks all of you for your help.

 

[Theophilus]

It's like that because you need to constrain your profile to your guide sketch with a Pierce relation. (You cannot do that if your guide sketch doesn't yet exist.) This used to give me trouble when I was learning, too.



Jeff Mowry

http://www.industrialdesignhaus.com

Reason trumps all. And awe transcends reason.