topic Re: Horizontal and vertical sketch constraint in Inventor Forum

Horizontal and vertical sketch constraint

Anonymous — Sat, 18 May 2019 12:54:10 GMT

In the machining section of a weldment:

Sketches on the X-Y plane (view cube "front"), Y is vertical on the UCS and the vertical sketch constraint is vertical.

Sketches on Y-Z plane (view cube "right"), Y is vertical on the UCS and the vertical sketch constraint is horizontal.

WHY?

Re: Horizontal and vertical sketch constraint

johnsonshiue — Mon, 20 May 2019 00:34:00 GMT

Hi! This has something to do with how Inventor chooses the default sketch coordinate. There is room for improvement for sure. In the meantime, if you want more predictable sketch coordinate, I suggest you consider using UCS. In this way, the sketch coordinate is always X and Y regardless of orientations.

Many thanks!

Re: Horizontal and vertical sketch constraint

Anonymous — Fri, 24 May 2019 13:00:01 GMT

Please excuse my ignorance on this, but how do I create a sketch using the UCS in the machining section of a weldment so the orientation will be as you describe? Depending on the application, I am either using an origin plane, user plane or surface as the sketch plane.

Keep in mind, "it is what it is" is also an acceptable answer.

Thanks,

Rick

Re: Horizontal and vertical sketch constraint

johnsonshiue — Fri, 24 May 2019 23:24:53 GMT

Hi Rick,

I don't think you can create UCS within Machining folder in a Weldment assembly. What you can do is to create assembly-level UCS or part-level UCS. Then you can create assembly sketch on one of the planes within the UCS.

Please note that assembly-level UCS is parametrically driven, meaning it is driven by 3 distance parameters and 3 angular parameters. For part-level UCS, it can be geometry-based (pick three vertices), or parametrically driven just like assembly UCS. Could you try it out?

Many thanks!