Snap point at the intersection of two construction lines

[Anonymous]

I have a very simple sketch of intersecting construction lines on the surface of a solid.

My goal was to then use that intersection as a snap point when using the Combine tool.

Seems this intersection is not a snap point by default.

The only solution I can find it to add a point manually while still in the sketch.

Is there a way to make that intersection a snap or inference point automatically? 

Regards, Preston.

[neljoshua]

@Anonymous,

I am only able to do this manually.  An alternate method is to create the point using construction geometry in the model space (rather than in a sketch), but I do not believe the results are different.

[jeevesme]

Like this?

[sales]

No, he's talking about in a sketch. I run into this all the time. When moving circles around, you create construction lines to guide your layout and when you move a circle, you want it to snap to crossed construction lines. It's one of the reasons you create construction lines, placement.

Anyone?

[etfrench]

Using the Break command will give you snapable points.

[sales]

Not on construction lines. An intersection of two construction lines should be snappable, heck, it should be considered a point. They are used for layout purposes. I'll post a video if I can, to show the issue.

[chrisplyler]

I understand the complaint, but I do not understand why you need a snap point during use of the Modify>Combine tool. This tool does not require any positional input.

[sales]

OK, I figured it out. I was grabbing the circle by the circumference, expecting it to then snap to lines, construction lines, grid, etc. Nothing was happening. If you select the circle by the center point, then it will snap to everything as it should. Arg!

Now how do I mark as solved?

[chrisplyler]

You can only mark as solved in threads that you started, unless you hold EE status or are a forum administrator. I think.

[martin.mudry1]

You have to make a coincidence of the center point to both intersecting lines. It's quite logical because the only intersect is a place where you can get the coincidence of the 3rd object.

[eldavid0000]

In my case I had used the Tangent constraint on two circles, making them intersect at one point.  Unfortunately, I was getting intermittent behavior by Fusion 360, where sometimes it was not recognizing this intersection and other times it was (creating a square when hovering over the intersecting point).  Without the square my suspicion is I am doing guesswork rather than parametric sketch/design. 

[eldavid0000]

Start point shows a square at an intersection, as expected:

End point does not create the square at the intersection.  This is not as expected, and seems intermittent as I had seen this previously.  A square is expected at the intersection, and there is clearly an intersection as there is a Tangent constraint (symbol shown). 

[etfrench]

You get the square when the cursor is over an endpoint, not necessarily coincident.  There are at least two ways to find the tangent point between two circles.  One: Use the Break command on one of the circles.  Two: Draw a line between the centers of the circles and trim or break the line.

Note: In your file, you have overlapping lines which is almost always a bad thing to do.  The endpoint of one of the lines will display the square.  Delete the circle and the other line and the square will still be displayed.

[bigtexan]

I did a coincident of a random construction line circle and the two construction lines of which crossed, and whalla, I get a circle at the intersection of the two lines... then i did a coincident to the point I want that intersection to pass through. Seemed to work. Hope this is meaningful to anyone reading this in the future.