Please HELP! Creating form from STL File

[jared.ebersole77]

I recently had a friend scan a skateboard truck for me. The truck has some complex shapes and corners (so I figured it would be easier to just scan it rather then spend hours upon hours drawing and measuring with calipers. 

I need to make a 'mold' that goes around the outside of the truck, I will try and show it with pictures and I will include the STL file if it helps anyone. 

I basically need to make a square piece the fits around the truck, but the inside of the square has to be cut out to fit the truck.. Does that make sense?

Im sorry if I posted this is the wrong place, I dont really come around the F360 forums a lot. Thank you guys so much for looking at this, and if you could help me out at all it would be great!! 🙂

The file was too large so I uploaded it to google docs, here is the download link: https://drive.google.com/open?id=0B0ISU0jNXGacbUNoaVJELUNDUlU

[Anonymous · Accepted solution]

Hi, 

Try to use this CAD conversion.

Hope it helps 🙂

[jared.ebersole77]

Oh my god!!! Thank you so much!!!!!!!! 🙂 🙂 🙂 🙂 Thank you thank you thank you!!! 🙂

May I ask how you did it??? I would love to know for future reference!

[Anonymous]

Hi, you welcome 🙂

I did not use F360 but you can achieve a similar result in F360 using the mesh sections + 2D Sketch. Basically  I used these commands:

• 2D sketches
• Extrude
• Revolve
• Trim & Split
• Fillets

[jeff_strater]

thanks @Anonymous,

@jared.ebersole77:  Here is a video that explains the basics of reverse engineering of a parametric shape from a mesh:  using mesh section and curve fitting.  This should get you started.

Jeff

[jared.ebersole77]

Hi Jeff, thanks for the response! I did this and it worked really well for adding a lot more detail. Only problem is that after I loft(ed) all of the sketches together the created piece is extremely larger than normal. Like a section that was 12mm is now 300+mm.. do you know what this could be?

[Anonymous]

@jeff_strater That video clears up a lot but I noticed that your mesh had lots of triangles. When I try to import a triangle mesh I get an error. Is there a trick?

[jeff_strater]

Hi @Anonymous,

You should be able to import most meshes.  How many triangles does your mesh have?  What error do you get?  If you want to share the mesh here, I can take a look at it.  I know that there are limits to what you can import into Fusion.  If the mesh is too large, you can open it in Meshmixer, and try to use Remesh or Reduce to simplify it.

Jeff

[jared.ebersole77]

Hi FB1970, I have been working in this 3d model for almost four straight days, im trying to get it to fit properly but I just cant.. Last time you converted half of the truck from an STL to a STEP, would you be able to do the whole thing? It symmetric.. Here is the link: https://drive.google.com/file/d/0B0ISU0jNXGacM3QxQ0NOalhDWEU/view 

If you could help me out I would really really really really really really really really appreciate it (like to the moon and back)..

[etfrench]

Have you tried the Mirror command?

[davebYYPCU]

Did you mean like this?, 

Create a construction plane on the C/Line, use it to split body, then Mirror the main section, Combine to make it one piece.

Not sure if there would be more editing, to make the fit you speak of...  if so do the edits before the mirror.

File attached.