CAD Challenge

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r-frank
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Re: CAD Challenge

Postby r-frank » Sun Jan 22, 2017 9:31 am

A_3 wrote:maybe something can be placed on the FC website to be available for download with the program and tutorials


The wiki will not allow upload of FreeCAD-files or PDF, that's why we have the github-repo FreeCAD/examples

As said earlier
r-frank wrote:Hosting at the FreeCAD/Examples-Github Project the files and a png with the draft view with draft diemsnions of the part and an STL-Version
of the part itself (Github can interactively display STL-files).
In the wiki the image plus a link for the file to github and some info about the file (FC version, notes ...) could be displayed.


That's what i am working on right now.
Hopefully i am able to show a first step within the next week ...
Deutsche FreeCAD Tutorials auf Youtube
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FreeCAD lessons for beginners in english

Native german speaker - so apologies for my english, no offense intended :)
A_3
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Re: CAD Challenge

Postby A_3 » Sun Jan 22, 2017 8:29 pm

@r-frank
Ok, got it.
One more account and pass to remember 8-)
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nemesis
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Re: CAD Challenge

Postby nemesis » Wed Feb 08, 2017 7:27 pm

r-frank wrote:That's what i am working on right now.
Hopefully i am able to show a first step within the next week ...


Hi r-franck
Did your work advance?
I was thinking about gif file to show the step by step design, without the heavy work of a tutorial...
very easy to do with 0.17 as the show function is according tree. It can help to understand the philosophy, and also can show quickly 2 different approach for one design
1stExample.gif
1stExample.gif (162.45 KiB) Viewed 507 times
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r-frank
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Re: CAD Challenge

Postby r-frank » Thu Feb 09, 2017 9:48 am

nemesis wrote:Did your work advance?


Hi Nemesis.

Well, I started downloading all pictures from the Reddit CAD challenge and some from GrabCAD.
Of course, the simple looking parts from GRABCAD turned out to be VERY hard nuts to crack at least with 0.16 part design. :(

What I did realize:
- Some isometric drawings used hidden lines for reference, FreeCAD can't do that in 3D-view
- the draft dimensioning tool is OK for linear dimensions, for radius/diameter/angles it is nearly unusable (may be related to the relatively small parts used)
- using annotations for dimensioning radius/diameter/angles in draft view is doable, but not comfortable
- using drawing wb and drawing dimensioning wb and setting up a drawing with dimensioned ortho views and an isometric view seems to be best choice for 0.16
- i am OK with using 0.17 for personal interest but i wouldn't recommend using 0.17 to new users yet ...

About the videos:
- the parts i have set up so far use up to around 12 features in the part design workbench
- sometimes i used expressions to make sure dimensions used more than once are linked
- max. GIF-Upload size in the wiki is as far as i know 20 MB
- a reasonable resolution for the GIF's seem to be 800x600

Next step would be to set up some test cases for further discussion ...

Roland
Deutsche FreeCAD Tutorials auf Youtube
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FreeCAD lessons for beginners in english

Native german speaker - so apologies for my english, no offense intended :)
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nemesis
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Re: CAD Challenge

Postby nemesis » Wed Feb 15, 2017 5:57 am

A_3 wrote:This is something I'm working in my free time, a document (fcd2p.pdf) with technical drawings-examples for practice. I hope that this will help begginers to get familiar with FreeCAD.


I did some exercice and add a github repo with gifshowing the step by step process example with 0.17 (feel free tu use it)
now I'm stuck on the 7th one :evil: don't have "clean" way of doing it.
good challenge ;)

r-frank wrote:- max. GIF-Upload size in the wiki is as far as i know 20 MB
- a reasonable resolution for the GIF's seem to be 800x600

20MB for a GIF is quite big, but that's right, maybe for complicated models it is not a good idea.
A_3
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Re: CAD Challenge

Postby A_3 » Wed Feb 15, 2017 5:32 pm

@nemesis

Great GIFs, they will be very helpful!

Some help with notorious 7th one part ;)
The part is here viewtopic.php?f=24&t=14115
Use a DAG view to see how I made this part and try for your self.
Attachments
g20216.png
thats my way
g20216.png (80.44 KiB) Viewed 327 times
Screenshot_20170215_181220.png
this is yours part
Screenshot_20170215_181220.png (37.89 KiB) Viewed 327 times
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nemesis
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Re: CAD Challenge

Postby nemesis » Wed Feb 15, 2017 9:10 pm

yep, I fought about this way.
but I put as rule to not do a full revolution for this part (just for the exercice)
so I think about using bodies and boolean operations. One body for the central, one for the radius, and on for the external part.

But I got some bug in 0.17 that don't help me a lot :lol:
my target is to make the parts in the 0.17 way :lol: