Cannot extend

[tmccar]

When sketching on the face of a solid, using the projected geometry of the edge, I get the error message "cannot extend a curve that is reference geometry" when trying to extend the line. 

[blair]

Can you post a screen capture or attached the offending file.

[JDMather]

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@tmccar wrote:

.... using the projected geometry of the edge, ..."cannot extend a curve that is reference geometry" when trying to extend the line. 

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Projected geometry is what it is.  You would need to Break Link the geometry if you want to edit it.

If it is just a line (and not a curve (understanding that in math a line is just a special curve)) I would simply turn it to construction and trace overtop of the projected geometry (I always do this in all cases).  That way if I make a significant change earlier in the history my entire part doesn't "go sick", only minor bits of sick geometry to fix.

[tmccar]

I have tried the construction option, but I still can't extend.

[JDMather]

You are constrained to endpoints (and where did you intend to extend to).

[tmccar]

I want to extend them to each other (to the apex).

[WHolzwarth · Accepted solution]

IMO, you should use separate lines with colinear constraints.

Walter

[Curtis_Waguespack]

Hi tmccar,

Generally speaking I think the wh's collinear constraint approach is the best approach, but attached is an alternate method.

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

[tmccar]

Yes, the collinear approach works great, but thanks for the alternative.

[WHolzwarth]

Curtis, I like your way. No sketching and constraining is needed with your solution for this special case.