sketch with multiple lines and arcs. want to extrude, but cant close path!

[Anonymous]

Hi Guys,

i am having a bit of a problem. I made a sketch with a few arcs and lines and want to extrude the whole object in non skech mode. Unfortunately the single lines and arcs do not close the path so i cannot select a plane to extrude in 3d. I have already read that there is no commandd to join lines. Does anybody know on how to resolve this?

[jeff_strater · Accepted solution]

Hi @Anonymous.  You must have a break in your curves somewhere.  It's a bit hard to tell from just the picture, especially because the sketch geometry is selected, so all the points are drawn.

There are a couple of techniques to fix this.  First, if nothing is selected, you can see "free" points (meaning points that are not connected by 2 or more curves), where normally these points are not drawn:

These points can be joined using the Coincident constraint, or by just dragging the point so that it snaps to the other point that is also there.

Second, use the technique shown by find-leak-in-sketch-geometry.  This is an easy way to find out where the disconnected parts of your sketch are

Or, if you share your model here, others will jump in and help.

Jeff

[Anonymous]

Hi Jeff,

thats what i was missing! Coincident constraints! Thank You! 

Best regards,

Marc

[MarkMcLean57]

I am having the same issue, new to fusion have completed a couple of drawings, and extrude went well, this last drawing - I can't seem to close the object. I'll link both files below.

http://a360.co/2h1T82A

http://a360.co/2hP6gIo

Any help would be greatly appreciated 🙂

[jeff_strater]

Hi @MarkMcLean57,

The problem here is that you have too many sketches:

For a region to be recognized as a sketch profile, it all has to come from the same sketch.  You have 38 sketches here, many of them empty, and many of them in a warning state (yellow).  You can create a new sketch, and project all the different curves into it, and they would join, but I suspect that's not what you meant to do.  I would delete all but the first sketch, and re-draw the shape, making sure that you edit that same sketch each time, if you exit sketch mode for any reason.

Your other design seems fine.

If you need more guidance than that, I can record a screencast.

Jeff

[MarkMcLean57]

Thanks so much Jeff! - that makes so much sense.. I have been used to saving work as i go when using 2d drawing - that's my mistake..

I'll do as suggested - should be no probs now 🙂

[Maciej_Rogowski]

Hello,

There is a new add-in called Fill Gaps in Sketch on the Autodesk App Store. It fills gaps between end points of lines and curves in a sketch. It allows to create closed profiles without gaps. 

Here is a link to the Autodesk App Store:

https://apps.autodesk.com/FUSION/en/Detail/Index?id=1232847965088759508&appLang=en&os=Win64

and a link to an instructional video on YouTube:

https://www.youtube.com/watch?v=6-J9GFCsWzQ

[TrippyLighting]

For imported geometry in DXF or SVG form this is a great tool.

However, for CAD accurate sketching in Fusion 360 I'd recommend analysis the sketch error and fixing it as Jeff has done above!