Snap Trouble

[tomGKJVK]

Hello,

I'm  enjoying working with Fusion360, but one thing I keep getting stuck on is all of a sudden I'm unable to snap to objects/points in a sketch.  I think I might be hitting something by accident to change the snap options, but I can't figure out what it is. 

It only happens when I'm trying to create an object (line, circle, etc) or move/copy or have another tool engaged.  It snaps to points/objects when I don't have a tool selected, but when I click on a tool to create a new line, it will only snap to the grid.  Not to my exisiting lines/points.

I also have trouble trimming/expanding.  It will expand or trim way beyond the intersecting line that I want it to expand to.

When I first create a sketch, everything works great.  Somewhere along the line, it stops working.  The only way I've found to fix it is to delete my sketch and start a new one.

Any advice would be greatly appreciated!  I'm sure it's something dumb I'm doing by mistake.

[Phil.E]

@tomGKJVK

Welcome to the Fusion 360 community.

Sorry to hear you are having some issues with sketch. It's really hard to imagine what's going on, despite your thorough explanation.

What would really help is a video. Can you give that a try?

The best recorder for Fusion 360 is Autodesk Screencast.

https://knowledge.autodesk.com/community/screencast

It will record all picks and clicks and allow me to see what's going on. You can embed the video here or just post a link.

Thanks for reporting, let's figure out how to make this work for you.

Regards,

[tomGKJVK]

Hey Phil, I'll record it as soon as it happens again.  Unfortunately I
don't know how to recreate it or when it's going to happen again. I've
downloaded screencast so I'm ready if it does.  Thanks.

[Phil.E]

That's all we ask. Sorry I didn't have a better solution at this point. Feel free to comment at any time or ask questions, even if this proves elusive. I'm happy to help.

[tomGKJVK]

Well, I went a good while without an issue and now it has popped back up.  Here's the screencast:

https://autode.sk/2HbJGGS

FYI, putting the screencast URL in the box where it's suppose to go on the forum gives an error "Not a Screencast URL". This URL was copied from the share button in screencast.

[tomGKJVK]

Actually resetting has not solved it this time.  I'm dead in the water at the moment.   

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@tomGKJVKwrote:

Well, I went a good while without an issue and now it has popped back up.  Here's the screencast:

https://autode.sk/2HbJGGS

FYI, putting the screencast URL in the box where it's suppose to go on the forum gives an error "Not a Screencast URL". This URL was copied from the share button in screencast.

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[chrisplyler · Accepted solution]

AHA!

You aren't trying to snap a sketch line onto another item within the same sketch. You are trying to snap a sketch line onto something else that exists outside of that sketch.

Try using the Sketch>Project>Project tool to bring the location of your desired point into the current sketch. Then you will have a magenta colored point IN YOUR SKETCH that you can snap to.

[tomGKJVK]

You're the man!   I don't know how I got this far without knowing that, haha.  Thank you.

[Phil.E]

Hi,

Thanks for following up.

Do you think this happens only with sketches that are placed on the axis of a cylinder?  I was able to reproduce this but only sporadically. I can log a report on it with this information.

The workaround is to project the body into the sketch using Sketch > Project/Include > Intersect or Project. This does what you expect to happen automatically - projecting in the intersected edge so you can snap to it.

Sorry for the trouble and thanks for posting.

Regards,

[tomGKJVK]

It’s been so inconsistent, I haven’t really identified any specific cause.   It seems that I’ve had it happen on square parts as well as round parts, but I don’t remember what my axis when it has happened in the past, sorry.

[davebYYPCU]

Just to round off this discussion, there are two preferences involved with Projecting, likely you changed a setting in the preferences along the way, where it used to go get the reference when asked for, but now it is turned off.

Might help...

[chrisplyler]

Phil, I think the reason I realized it is that I've long since turned off the auto-project option. And of course the option is only useful if you create a sketch right on an existing face of a body, so of course is isn't going to work as desired when you're create a sketch parallel to a cylinder. Good thinking. Not really a "bug" in my mind though, as I never expected auto-project to pick up intersects even when it was on.