Copy and pasted inverted

[Anonymous]

Copy and pasted inverted issue.

There is a long lasting bug regarding the copy and paste function within fusion 360. When I tried to copy a sketch and paste the sketch under another component, the pasted sketch will be inverted and mirrored to the other side. I searched over the forum and this problem appears to be around for more than 3 years. Yet, no one came up a solution for that. Is there any updates for this problem?

Attached link is a screencast of the problem.
https://autode.sk/35Xf61i

[TheCADWhisperer]

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

[jeff_strater]

sketch geometry is stored relative to the coordinate system of the sketch itself.  Each sketch will have its own CS, and pasting geometry from one sketch to another will simply make it relative to the new sketch's CS.  Depending on how the sketch was created, it can have a CS which is way different from the source sketch, hence the rotation/inversion.  You have to move/rotate the geometry to be how you want it in the new sketch.

[mgianzero]

I don't think what you're saying is entirely correct.  When the Z axis is defaulted up, for some reason F360 doesn't like to copy a sketch onto the XZ plane properly - it is inverted.  The same coordinate system is used in both the source and destination XZ planes. 

I can reproduce this error over and over again.  I have a sketch in the XZ direction on one plane and if I create a new sketch on another XZ plane and copy from the source to the destination, it always comes up flipped as, for some reason, the new plane is flipped with greater positive Z values now going downwards if they were going upwards in the source plane.

You can even see it when you're selecting a plane when creating a new sketch.  The 3D cube shows Z+ as up (you would think this is the convention) but when F360 shows the new plane surface, it shows Z+ as pointing downwards, which it counter-intuitive.

Marc G.

[jeff_strater]

@mgianzero - This issue is not quite so simple.  It has come up many times in the past, and there is a good reason for the behavior.  I don't disagree that it is undesirable, but it is "correct".  See this thread for the details.

why-is-my-sketch-text-appearing-upside-down 

this response later in the thread also expands on it:

why-is-my-sketch-text-appearing-upside-down2 

We have since masked this issue for text by automatically flipping the text on creation, FWIW.  That is not possible with Paste, unfortunately...

[HughesTooling]

@jeff_strater  I guess when pasting sketch geometry it would be nice to have the flip options from the insert SVG dialog. Could do with these controls on the Insert DXF dialog as well.

[mgianzero]

Jeff,

I have read your references regarding the same question as you noted.  I know about right-handed and left-handed coordinate systems as we've learned that in engineering.  I am aware that F360 has issues with the XZ plane when using the right-handed Z-up coordinate system (CS).  But that still doesn't negate the fact that a simple maneuver doesn't work correctly here. 

Let me restate the problem here.  ...    If I wanted to simply copy and paste the IDENTICAL sketch from one XZ plane to another XZ plane (with the same design, component or new design or new component), it should do exactly that.  If I set my 3-D cube as a front view in my source XZ plane and copy and paste it to a new XZ plane (cube not touched) then it should copy and display both coordinates identically. This should have nothing to do with right-handed or left-handed coordinate systems.  I can demonstrate with a screencast, but I am sure you know exactly what I am talking about.

I guess a possible simple solution to this problem for F360 developers would be to have a "copy sketch plane" option which does exactly as it says - i.e. copy the source plane in one orientation to the SAME orientation in a new sketch plane.