Cannot select a line

[ninthabandit]

I want to create a sketch that "traces" the outline of this model, but I cannot select it when I am trying to use the parallel constraint on it. Does anyone have an idea? Thanks in advance!

[JDMather]

Project Geometry.

(In this case you might want to Project the Face in one click.)

Attach your file here if you can’t figure it out.

[ninthabandit]

Hello, I did project the geometry. But still I cannot select that particular line. The file is attached. Thank you for your reply!

[JDMather]

@ninthabandit 

I am not at my Inventor machine to check the ipt file that you attached, but from the image I do not see a Projection.

If you do actually have it projected,(but not shown in your image) my next thought is that the edge is defined as a Spline and not as a Line.  But you can Offset a Spline if that is what it is.

[ampster40]

the lower surface where that face connects has a radius, suspect this may be giving you an issue.

Not sure where "from insert.ipt" came from but that reference file is missing from your original attachment.  Providing that file may assist us in coming up with something that works.

edit, following along with JD's suggestion about projections, I also tried simply projecting the lines you show you are attempting to "offset" (that is what you would typically do here) and in mulitple attempts it fails in particular to the line you are experiencing issues with.  So the normal method of offsetting an existing profile doesn't work either.

[ninthabandit]

Is the newly attached

1.394 insert + part.iam

the reference file? I hope it is. I created the original .ipt file by deriving this .iam file. Please let me know if it is not correct. I appreciate your help!

[ampster40]

The model opens but complains bout missing reference file, the path to it is shown below;

[ninthabandit]

Hi ampster,

The second file I've attached wasn't the reference file? Thanks!

[ampster40]

caught that it was added to the first msg.  I can get back to this later on but not immediately.  May be tomorrow, sorry - at work.

[johnsonshiue]

Hi! I suspect the target edge may not be straight. Try creating a workaxis on that edge. Does it work?

Many thanks!

[BeKirra]

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@johnsonshiue wrote:

Hi! I suspect the target edge may not be straight.

...

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Yes, agreed with @johnsonshiue.

I also guess it is a curve with a large radius (i.e. oval) or it is a spline in the sketch.

[JDMather]

The edge is a spline, not a line.

You can Project the face and the Offset the Projected Geometry.

If this Offsets more than you want you can toggle the extraneous to Construction...

BTW you could have observed that the projected edge was not a line by sketching a line from endpoint to endpoint and zoomed in...

...the geometric definition of a line.