Sketch over constraint with no obvious reason

[alexaxenty26]

I have this issue with a sketch being constrained for no obvious reason.

If I add a parallel constrain between line 1 and line 2, dimension 3 can be modified(see attached screenshot).

I don't get it, I should be able to modify dimension 3. I attached a very simplified sketch of my model with this problem.

[TheCADWhisperer]

Note how this point must shift with the way you have it set up.

Oops, my mistake...

Try the Attached...

[alexaxenty26]

OK, maybe trying to simplify things to give as an example was not the best idea. That line I used as an example.

I'll attach the complete sketch. -> here when I try to modify the same dimension as in 1st picture I get the over constrained message. I deleted everything and found out that even if I have a simple line constrained to line 1 I have the same problem.

[TheCADWhisperer]

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@alexaxenty26 wrote:

OK, maybe trying to simplify things...

I prefer to use many simple sketches rather than a complex sketch. I don't think I know I have ever had a sketch with that many dimensions/geometry constraints.

[alexaxenty26]

I'll try to split in 2 different sketches and project what I need from 1st to the 2nd one, maybe this will work

[TheCADWhisperer · Accepted solution]

Be sure to "exercise" the first sketch before going on to the second sketch.

You want to make sure that edits do not break the sketch before making additional cross-sketch relationships.

Also - I would look for stuff that can be patterned as feature/bodies/components rather than as duplicated sketch elements.

[g-andresen]

Hi,

just watch the screencast using text commands.

günther

[alexaxenty26]

Thanks for the hints, splitting into 2 sketches finally did the trick.

No more problem, also improved some things here and there. Only a coupe of hours trying to figure out what was over constrained.