Help with partial constraints?

christopher_jirka

I'm loving learning to use OnShape. I learn best when I have a project that forces me to dig deeper, so I'm working on a cutout for a friend.

I can't figure out why the heart (splines) at the top is blue. Can someone take a look and let me know what I need to do to fix the constraints. Also, the box on the left side. Once these are fixed then I'll replicate them.

https://cad.onshape.com/documents/36746d25d7348c913810e494/w/acc47afcdef1530cfc320254/e/3a158bfc16c042baf75506c2

Thanks,
Chris

lemon1324

Short answer: The box on the left the lines are free to move wider/narrower.  On the spline, the endpoints have not been dimensioned to anything, and the control points (which control the path between endpoints) have also not been dimensioned to anything.

In an engineering application, I'd add dimensions to whatever critical parameters you have with respect to function.

In this case, though, since you're tracing an image to match a design, I'd drag points around by hand to lie over the image, and then select and apply the "fix" constraint to prevent further accidental motion.  The "fix" constraint is the one at the far right of the bar, and tells Onshape not to move the geometry you selected, without having to supply additional external dimensions/constraints.

lemon1324

Short answer: The box on the left the lines are free to move wider/narrower.  On the spline, the endpoints have not been dimensioned to anything, and the control points (which control the path between endpoints) have also not been dimensioned to anything.

In an engineering application, I'd add dimensions to whatever critical parameters you have with respect to function.

In this case, though, since you're tracing an image to match a design, I'd drag points around by hand to lie over the image, and then select and apply the "fix" constraint to prevent further accidental motion.  The "fix" constraint is the one at the far right of the bar, and tells Onshape not to move the geometry you selected, without having to supply additional external dimensions/constraints.

christopher_jirka

Awesome, thanks for the quick reply. I'll give that a go.