Sketches: Smart guides/snapping won't work when editing older sketches?

[Anonymous]

Hello,

I currently am having some trouble editing a sketch right now. The sketch is closed and it appears early in my timeline. After designing, I decided that I need to make some changes to the sketch. I have noticed that when going back to edit the sketch, I cannot get the snapping guides feature to work for any of the tools (line, arc, etc...). 

Example: I would like to delete a line (that opens the sketch again), start drawing from an open vertex, and close the sketch again with new linework. Unfortunately, I cannot begin new linework on the desired vertex of the existing sketch. Now, if I start sketching a completely new object. the snapping guides work fine, but not when editing an existing sketch. 

Is there something I am missing or doing wrong?

[Anonymous]

So I am not really sure what happened in the software. I created the sketch on a tangent plane and I used this sketch to 'project to surface' and could not properly edit the sketch. I also moved the sketch from the original plane. I don't know which or all of these is causing issues or if it is simply something else.

To note, all the other sketches in my project are perfectly editable. Of course this is the one sketch I do need to edit.

I am not in the process of recreating the sketch, which is a bit of a waste of time.

[MichaelAubry]

Hey grindeddown,

Would you feel comfortable sharing the file with us?  Either attach as a forum post or if it's sensitive just email me at michael.aubry@autodesk.com.  Nothing immeadiately comes to mind why you're seeing this. We'd like to see if it's file dependent. 

Thanks,

Mike

[Anonymous]

Certainly Mike. Thank you for taking the time to reach out. It is not anything sensitive for the time being, just concepting a little. I’ll post it in a few moments here.

[MichaelAubry]

Hey did you send it? Haven't seen it yet.

[Anonymous]

So I have attached the file. Pardon the disorganization as I am only working on a quick-ish test. The sketch that is giving me the issue is sketch2. Once you open the 'edit sketch' function, you'll notice that you can select all the verteces and lines, but you cannot snap to them at all when attempting to add to the sketch.

Some notes: I did move the sketch from it's original plane. I may have also rotated it so it would line up with the front facing plane to aid in working with the 'project to surface' function.

If there is any additional info you may need from me, just let me know.  

[MichaelAubry · Accepted solution]

Figured it out. The plane that you've created that sketch on is offset from where the sketch geometry actually is located. The result is the sketch is behaving as a 3D sketch instead of the typical 2D. Notice how when the sketch snaps outside of where it's expected it snaps to the plane:

So the question now becomes: How did you get there?? Sketches are supposed to move with their parent planes. Do you remember the workflow you did to make that plane give you a warning (the yellow)?

To solve that unfortuantely if you want the sketch behavior you're likely expecting you'll have to recreate the geometry on a sketch attached to a plane.  That's a new one for us.  Hopefully this doens't put you too far back on your model. I tried redefining that sketch offset from an origin plane and it seems to hate that. At this point I'd delete and recreate.

Let me know.

Best,

Mike

[Anonymous]

Ah yes ok I see that now. I guess I'll have to be careful about that in the future. Thank you for your help!

[Anonymous]

In regards to replicating the issue, I'll have to wait until I get back home to see if I can retrace what it was that originally caused the issue.

[Anonymous]

I have encountered the issue again just now in working with a modified version of this model I showed you.

Here is where I am finding the issue to occur:

I have created a sketch, which I wish to replicate and then mirror for use on another part of a body (using split body and the sketch as the tool). What I have done is to open the original sketch I wish to copy, which properly allows for snapping and the like. I then select the contents of the sketch and copy them. Next, I create a new and separate sketch and I past the contents in. One they are pasted, the automatically give me the option to move this new sketch around. I have placed the sketch elsewhere. After placement, I later rotated the sketch using the 'move' command.

From that point, I am no longer able to snap to the object or do things like add/edit sketch dimensions.

I'll keep posting my findings, but I hope this helps narrow it.

EDIT: 

I have tried to replicate the problem one more time and I think I may have found where the error is occuring. If I simply copy the contents of one sketch and then paste them into a new sketch and move them using the move tool that automatically pops up, everything remains fine; snapping/dimensions/etc work fine. However, if I later move or rotate the new sketch object using the move tool (under modify) all of the snapping and dimensions no longer work.