Relax Contraints

[GMDCNC]

Is there a way to relax contraints in 2D sketchs like there is with Inventor? I can't seem to find it.

[Anonymous]

Hmm, not that I'm aware of (that sounds interesting in Inventor, but have never used that program).  But you can choose to make a dimension driven, so that it indicates the dimension but does not define it. 

It takes some getting used to with constraints and dimensions to get a sense of where overdefinement occurs.  If you ever need some help be sure to post on the forum.

Jesse

[GMDCNC]

Not exactly what I'm looking for. I need to define a dimension. Relax constraints allows you to move around constrained geometry without having to manually remove the constraints holding that geometry in place. Basically telling Inventor to automatically remove whatever constraints it needs to in order to move things the way you want them moved.

What I need to do is adjust the radius of the ends of a slot made with the centerpoint slot tool. Unfortunately, I can't figure out how to delete whatever is constraining the radius, and I don't see a dimension to change. All it will let me do is create a driven dimension, which only tells me what the radius is. I know how to create the slot with the radius I need manually, but I was hoping there was an easier way.

[Anonymous]

Hmm, I just tried creating a slot with the sketch slot tool, then went to Sketch > Sketch Dimension and clicked on one of the half circles of the slot, which then allowed me to enter a radius for it to whatever I want, after which upon hitting enter the whole slot updated.  First of all, try doing this with a newly created slot.  When you can successfully get that to work, move on to the slot in question, and if it is behaving differently, look at possible constraints that are preventing such dimensioning.  A screenshot or even the exported .f3d would help diagnose the issue if it persists.

Good luck!

Jesse

[GMDCNC]

Sorry, my fault for not explaining myself fully. I need to define the length, width AND radius of the slot. Fusion will only let me define two of them.

The slot I need is on the left. The radii are larger than what 360 lets me make with the slot tool. The slot on the right is what 360 will allow. 

[Anonymous]

I believe the issue is the four tangent constraints that are automatically created by the slot tool.  The icons appear in your sketch kind of like the capital greek letter omega.  You need to delete each of these, by clicking on one until highlighted as a light blue, then pressing the delete key on your keyboard, and so on.  Then you should be free to make the arc ends nontangent to the side lines as in your first example.

Jesse

[Anonymous]

Wanted to mention, I ran into the same trouble for awhile of not knowing how to delete constraints 😉

[jeff_strater]

No, unfortunately, there is no automatic way, today, to relax constraints as in Inventor.  As Jesse says, you have to delete 'em yourself.

Jeff Strater (Fusion development)