topic Re: Offset Sketch Arc appearing incorrectly in Fusion Design, Validate & Document Forum

Offset Sketch Arc appearing incorrectly

Anonymous — Wed, 11 Jul 2018 18:55:53 GMT

Im trying to create an offset sketch of an intersection of a body. With certain sketch arcs that make up this intersection, the offset preview (red line) shows up correctly as I want it to. However, once I actually create the sketch it gives me a different sketch that looks like maybe is defined by a circle that arc might be defined by.

Is there a way to make it sketch what it shows in the preview? Only this model specifically gives me trouble with this (maybe because it was created in some other program), but I wanted to confirm if I'm missing something.

The two arcs on the left side dont show up as the preview does. It will also do this if I select the arc individually.

Re: Offset Sketch Arc appearing incorrectly

TheCADWhisperer — Wed, 11 Jul 2018 19:46:35 GMT

I didn't see the sketch that exhibits the behavior you describe in the file that you attached?

In any case, rather than fight it - I would simply change the offending arcs to Construction and then sketch in tangent arcs in the correct orientation.

Re: Offset Sketch Arc appearing incorrectly

rohit.bapat — Thu, 12 Jul 2018 17:36:20 GMT

Hello @Anonymous

Thank you for posting the issue. I was not able to reproduce this behavior. Could you please let us know the version number of the Fusion you are using? (You can find it in the top right menu->About)

Thank you

Best Regards

Rohit Bapat

Re: Offset Sketch Arc appearing incorrectly

Anonymous — Fri, 13 Jul 2018 18:53:50 GMT

Thanks for the quick response @TheCADWhisperer,

So I should say that Im actually trying to automate this using a Python Script, and it was showing this unexpected behavior via the script so I tried it manually which also showed the same behavior. After trying a few things, I realized that it does this when I create the intersection from a plane offset from the XZ plane.

@rohit.bapat,

The version I am using is 2.0.4279. However, I was able to find where it is being drawn differently. The file I sent was a slightly earlier one (my mistake) in which the plane was defined as an offset from the bottom face of the body. This mistake is only happening when Im using the plane offset from the XZplane, which is part of the automatic process performed in my script.

I have attached a more recent file showing the difference. The two planes are at slightly different heights.

I appreciate your help!

Re: Offset Sketch Arc appearing incorrectly

rohit.bapat — Mon, 16 Jul 2018 11:08:31 GMT

Hello @Anonymous

Sorry for delayed reply. I will try out intersection on the latest file attached.

Thank you

Rohit

Re: Offset Sketch Arc appearing incorrectly

TheCADWhisperer — Mon, 16 Jul 2018 11:28:45 GMT

If you attempt to dimension the offset curves - you will note that some will permit radius dimension.

The others (the ones presenting unexpected behavior) are splines rather than arcs.