Component coordinate system orientated differently than ViewCube

[Anonymous]

I have a situation in a simple assembly where the component coordinate system is rotated on an axis from the ViewCube.  When I isolate the component for edits and start a sketch the window does as it is supposed to, such that the grid and axes are normal to the screen, but the ViewCube is slightly rotated.  If I click on the ViewCube the screen changes to reflect the particular view I selected, but now the grid and the two axes are not normal to the vertical and horizontal of the screen.  I do not know how to realign the ViewCube to the sketch orientation.

I have been using Fusion 360 for over 2 years, and this one is new to me... I presume the ViewCube is the WCS

[TheCADWhisperer]

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Can you Reset the View Cube?

[Anonymous]

If you look at the turntable component and check the 3 sketches in the timeline you will find that the coordinate system for the component is different than the ViewCube.

With assembly activated I rotated the turntable to a random angle.  Then I activated the turntable component and created a sketch on the face of the turntable, I select capture position and it opens the sketch view.

I understand how this is happening...now, but I cannot figure out why you would want the entire sketch view other than normal to the screen and the ViewCube.  If I happen to move the 3d mouse and get things a little askew, the ViewCube standard views do not help.

Edit one of the sketches in the timeline, and then without adding any sketch elements dimension the cutout.  There dimensions eventually place correctly, but during the selection process some odd things happen.

Maybe this is how F360 always behaved, but I do not remember it being so.

Thanks for your help

[jeff_strater]

The short answer is yes, this is how Fusion works, and how it has always worked.  What you are seeing are the artifacts caused by you having moved the "turntable" component, primarily by adding a joint to your assembly.

Here is a screencast (with audio) showing a bit about why this is the case.  If this is not clear, please feel free to ask additional questions.

Jeff

[Anonymous]

Jeff,

Thanks for your screencast, it is appreciated.  However my question/concern has to do with going a little deeper into the assembly.  Select and activate the turntable component, and isolate.  There are several sketches without any features, please edit one of those, and if questioned select capture position.

What I find happening is that the component coordinate system is now different than the ViewCube but the sketch opens as you would expect, with the grid oriented horizontally and vertically to the computer screen.  If you look at the ViewCube, and click on it to "normalize" the view, the sketch grid will now present at an angle to the screen horizontal and vertical.

I do not understand why this would be desired, as I would expect when editing a specific component I would probably desire to use the components coordinate system rather than the world coordinate system.

If there is a reason that one would want the sketch grid at and angle I would like to learn why it would be desired.

Thanks

[jeff_strater]

Hi @Anonymous,

The sketch coordinate system orientation is really the same issue as with the component.  In the screencast below, you will see that the coordinate system of those sketches are aligned with the owning component's coordinate system.  In the case of the turntable component, because that component has been moved by the joint and Position features, that CS is not aligned with the global CS.  This is what I would expect to see.  And, if you move the component further, the sketches do an should move with that component.

Jeff

[Anonymous]

Hi Jeff,

Thanks again for the screencast.  Problem for me is that it appears that it is not practical to edit components in an assembly where the component coordinate system is oriented differently than the world coordinate system, because of a move or a joint or whatever.

This is a serious problem, at least for me.  I understand that when components are moved their coordinate system might be different than the assembly world coordinate, but when I wish to edit a component I guess I need the component's coordinate system to become the temporary WCS.  I just tried to do a delta measure using the inspect tool, while in edit with the component isolated, and the measurement came up with the xyz delta measurements oriented to the assembly world coordinate system; for my intended purpose, it was totally useless.

[Anonymous · Accepted solution]

Jeff,

Probably common knowledge, but based on your screencast I suppressed the joint, rather than delete it, the local cs and the global cs are aligned.

I then opened my actual project and tried the same work around and found that it behaved the same way, which is good.

To me it is not an ideal solution, but I will consider it solved.

Thanks