how to edit projections?

[mpriceA47C2]

On other CAD systems, I am used to relying quite a bit on 3D to 2D sketch projections to speed up work flow. Fusion does not behave similarly, but clutters the sketches with a lot of un-editable purple lines. I have looked at some tutorials, but they do not help. How do you use the sketch projection feature and get something useful?

[Brady_Fulton]

Yes, purple indicates projected elements which you can't edit because they're locked to the location you projected them from. You can make them construction lines if you don't want their presence to affect the elements you add to the sketch and then still use them for dimensioning and constraints.

[jeff_strater]

Not quite sure what you mean by "get something useful".  If you have some examples to share of cases where the projection is not useful, that would be helpful.

Regarding "clutters the sketches with a lot of un-editable purple lines", you can disable auto-projection here:

finally, regarding "editing", I assume that you are referring to the fact that in Solidworks, you can trim projected curves.  Yes, you cannot do this in Fusion.  But, you should never need to trim projected curves in Fusion.  You can just use whatever portion of the projection you need by selecting the region defined by the intersection between normal sketch curves and projections.

Jeff

[mpriceA47C2]

Your first  tip was helpful. I am now able to create and edit projections. I  don't get your second point about trimming, but I am exploring and making progress. Thanks.

[laughingcreek]

jeff.strater wrote:

 But, you should never need to trim projected curves in Fusion. 

@jeff_strater-That statement isn't at all accurate.  Lofting in fusion would be so much easier if we could trim projected curves like in solid works.

[cekuhnen]

@laughingcreek @jeff_strater

Ja I agree

If lines overlap it would be beneficial if the surfacing and solid modeling tools could identify line/curve intersections automatically

particularly also in 3D projected profiles onto surfaces

[mpriceA47C2]

I am still having a difficult time with the sketch engine.

In previous CAD systems, I learned to rely on projections for creating sketches. In F360, I never know when the purple clutter appearing  in my sketches represents projected geometry or not. Some of it is editable, some is not. Some actually seems to provide geometry to the new sketch, some does not.  Getting rid of it is like whack-a-mole. I find hidden areas that don't reveal their clutter unless I highlight them, but if I don't find them, the sketch is useless. I have stopped using the projection feature, just manually tracing curves with the spline tool. But this doesn't completely avoid the problem. I have sketches corrupted with purple clutter where I never used the projection tool, F360 projecting edges into my sketches unasked, forcing me to go back and try to clean them up manually.

It is clear to me that the projection feature is poorly implemented and confuses the graphics engine. I tried to clean up a sketch today and and the graphics engine introduced  bunch of artifacts, shrank the sketch into a microscopic point on the screen, then lost the component entirely. I had to reload from an earlier file.

Suggestion: Cut the purple clutter. If you project a line or a curve or a surface, the projection should be just another editable sketch component on the plane of the sketch. That is the whole point of a projection. There should not be any uncertainty about what you are dealing with, and no introduction of projections unasked.

There are other problems with  the UI. Maybe the users are beta-testing it while the programmers have moved on to sexy new features. Lotsa potential here, but providing a bombproof UI for basic CAD functionality should be the priority, for my money.

[cekuhnen]

@mpriceA47C2

"But this doesn't completely avoid the problem. I have sketches corrupted with purple clutter where I never used the projection tool, F360 projecting edges into my sketches unasked, forcing me to go back and try to clean them up manually."

This reads to me that you still have auto project on - meaning when sketching and the mouse is close to a different object it will project curves from that object into the sketch.

Can you doulbe check this in your prefs? Or make a screen recording?

[mpriceA47C2]

I just checked my preferences and autoproject is OFF. 

As a side issue, it appears I have to turn off constraint display every time I enter a sketch. I would expect it to be persistent. Maybe that is somewhere other than the sketch pallet.

Just now, I created a sketch and projected a circle onto the sketch plane from a hole edge of another component. But when I got out of sketch mode, I was unable to select the circular area for a pull operation, though I could see the circle outline clearly in the proper plane. So I decided to edit the sketch to see what was wrong with it, but I couldn't find it anywhere in the object tree. I eventually turned off the visibility of every component, including the project root, until the screen was blank, except for the circle. I couldn't select, delete, or move it; it was a ghost. I reloaded F360 and it was gone.

[cekuhnen · Accepted solution]

@mpriceA47C2

If outside of sketch you only see the lines and no fill than right mouse button click onto the sketch in the browser and select show Profile.

Profile is the yellow fill area of a closed sketch.

Claas

[mpriceA47C2]

Still having major difficulty with projections. I projected a curved edge onto the sketch plane, but had to put in some lines to make it a closed figure. Can't get a profile out of it, can't tell what projections are contributing or not to the figure, can't edit some of the projections, can't see why it won't give a profile. Included an image of the sketch. Please advise.

[mpriceA47C2]

OK. I finally got a profile. The trick was saving the file, exiting out of Fusion, then reloading fusion. There were gaps in the sketch that did not show unless I reloaded. I repaired them, then reloaded again, repaired again, and presto! a profile. 

Unless there is more progress on the sketch UI, I am reluctant to pull the trigger on a subscription to Fusion. Anybody have news on an update?

[cekuhnen]

@mpriceA47C2

Can u share your design

or make a screen recording of where you had issues

[mpriceA47C2]

I just posted my first screencast in a new thread of ghost bodies. If I have another tantrum about projections, I will post something here. Thanks @cekuhnen for your attention and advice.

[mullcom]

Hello.

I open upp this post by adding my comments her to.

I finding a dificult with prodject funktion when i working with import STL.  When i try to make new bodys with projekt line it still make this lines. and its really enoying vecouse i cant modify prodject lines.

I wish this was more easy to get rid of this. lines with extruder funktion

se image as follow.

[g-andresen]

Hi,

try this:

günther

[mullcom]

Thx for the tip but dont get rid off the line. but now i can edit and god progress. 

[g-andresen]

Hi,

if the line already exists:

break link

rightclick > break link

günther