I have many drawings with a tangent line sketched so I can dimension the overall width, but after saving and reopen the sketch loses it's relations. Has anyone seen this or know how I can fix it?
You shouldn't be losing relations, but it may be caused by a conflict with the sketch becoming over-defined when you define a line with relations and then add dimensions. Try checking this box and see if it helps.
Thanks for the reply, but we already have that box checked. Is there any other issues that could be causing this problem?
I'm afraid I don't have any other ideas about why you're losing relations. But in the example you've shown above you shouldn't need the line anyway. See #16 at Frequently Asked Forum Questions.
I would agree with you on the above statement, but it is not a circle or arc. It is a silhouette edge and we get the error shown below.
So in this case I think we need the line to attach the dimension.
You're right. In that case it does look like you'll need some sketch geometry. Have you tried making an endpoint of the line coincident with the silhouette edge? I'm shooting in the dark here, but that may work.
Good thought, but I just tried it and had the same result. Something is causing the sketch line relations to go "corrupt" after a save, close and reopen.
Can you Pack and Go the drawing to a zip folder and post it here?
Here are the files, pack and go'd.
I'm sorry Robyn. I couldn't figure it out in the few minutes I could spare to look at it. Maybe someone else will be able to.
I just thought of something as I'm writing this. Create the sketch in your Assembly instead of in the Drawing. Show it in the Drawing and place your dimensions. Sketching is often more stable in models than in Drawings so that may work.
Thanks Glenn, I will give this a try.
Even though you can sketch within the drawings, there is no guarantee of the relations staying within the model, especially when you move the view, unless you right click the view and select "Lock View Focus" and also "Lock View Position"
Even selecting both of those there have been times where it still is a pain to sketch within the drawings, agreed with Glenn, better to sketch within the part, but at times that isn't the best look etc..
Ok Glenn, here is a new one. So I thought I would take your advise and sketch in the model instead of the drawing. Now when I switch configurations that sketch loses its relations!! I guess I am going to go back to doing it in the drawing at least it doesn't blow up the tree with red and yellow!
When you created your sketch did you set it up so that the sketch was active in all configurations? If you have part features that use geometry but aren't absorbed by it even if you setup the feature to be active in multiple configurations the sketch won't be. This would explain why the tree is then breaking as the sketch isn't transferring to the other configurations that use the sketch to generate geometry.
Good thought but I made different sketches per configurations, and it is still losing relations.
You usually can hold down shift while adding dimensions to dimension the inside/outside of a curve. Does that work in your case?
Not really, because these are silhouette edges not actual circles or arcs.
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