Editing a sketch makes features disappear

Editing a sketch makes features disappear

wcarlsonM2NUS
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Message 1 of 14

Editing a sketch makes features disappear

wcarlsonM2NUS
Enthusiast
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I need to move the holes on the lug down one mm, but editing the holes makes the troughs adjacent to the lugs disappear. I realize this has to do with the order in the timeline, but how do I resolve this?

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Message 2 of 14

dsouzasujay
Autodesk
Autodesk

Hi @wcarlsonM2NUS 

 

When we edit a feature from the timeline, All the features after the edited features will be suppressed, its expected behaviour.

 

Could you please explain in detail about what the problem you are facing?

There are 6 holes on 3 faces, point them which hole has to me move by a mm. there will be multiple ways to handle a situation.


If my answer helped, please 'Accept Solution'


Join Fusion Insider


Sujay D'souza
Autodesk Fusion

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Message 3 of 14

Bunga777
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This Sketch10 is a little strange.

bunga_0-1671556271745.png

First of all, it is irregular to draw a sketch of a hole horizontally to a flat surface.

And it is also odd to have the dimensions at an angle.

Normally, you should draw the sketch on the plane on which you want to draw the sketch and put in the dimensions.

For example, like this.

bunga_2-1671556529771.png

 

That way, nothing will collapse if this 13 dimension is changed to 12 or 11.

bunga_3-1671556640734.png

 

I have attached the corrected file.

If the corrections are off the mark or if other corrections are needed, please ask additional questions.

 

 

 

Message 4 of 14

wcarlsonM2NUS
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I am very new to this and learning as I go along. Which is likely the issue, since I may not be organizing tasks in the order a more experienced user would.

I'm not sure what this means; "First of all, it is irregular to draw a sketch of a hole horizontally to a flat surface." 

I thought I was doing this; "
Normally, you should draw the sketch on the plane on which you want to draw the sketch and put in the dimensions."

I sketched the rectangle and extruded it for the lug, drew the circles on the lug and extruded them through the lug to make the holes, then drew the rectangle and extruded it a negative value to make the trough.

Please help me to understand the difference in methods. I'll look at the project you did.

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Message 5 of 14

laughingcreek
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@wcarlsonM2NUS wrote:

...I'm not sure what this means; "First of all, it is irregular to draw a sketch of a hole horizontally to a flat surface." 


He means those circles in sketch10 don't lie on the plane the sketch was originally created on. that means you either had 3dsketching checked on and selected a plane on the dongle thingy to get teh circle upright, or you used move to rotate the circles into position.  either way that would be considered bad practice as it adds to the difficulty of properly constraining and making things work parametrically.  in most cases you want to keep your sketches 2d, meaning all elements lie on the plane the sketch was created from.  once you create an element off the sketch plane it is considered a 3d sketch.

 

ideally you place sketches only on the origin planes.  this  object could be made with just 3 sketches, one on each origin plane.  the result would potentially be easier to  make edits to, and also more robust/stable.

Message 6 of 14

laughingcreek
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incase your interested, this is how I tend to approach these types of designs-

laughingcreek_0-1671577151185.png

 

Message 7 of 14

Bunga777
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@wcarlsonM2NUS , Sorry and @laughingcreek Thank you.

 

That expression of mine does not convey the intent, I am sorry.

 

"Usually, you draw a sketch on a plane with the same orientation as the direction you want to extrude and fill in the dimensions."      I have rewritten it as.

 

The Sketch10 in the problem is drawn in the XY plane, so it should be pushed out to the Z axis.

bunga_0-1671581484979.png

 

 

The hole you are trying to make needs to be extruded in the x-axis direction, so it is usually written in the yz-plane. (See. Sketch16)

bunga_2-1671581545646.png

This time, however, for clarity, we indicate the plane near where the hole will be made.

 

The reason why such irregular sketches are possible is that this 3D Sketch is checked.

It is better to turn this switch on only in special 3D situations.

 

 

 

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Message 8 of 14

wcarlsonM2NUS
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I am very interested but I'm not sure I follow. I am trying. I am watching the free tutorials. Haven't gotten to this point yet. If I stay in 2d, how do I extrude a part? Doesn't it then become 3d?


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Message 9 of 14

laughingcreek
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The suggestion is for SKETCHES to stay  2d.  the SOLIDS (i.e. extrudes) are 3d.

in your model, sketch10 is considered a 3d sketch b/c the circles don't lie on the sketch plane (the plane the sketch was created on).  We are suggesting you not do that.  See @Bunga777 explanatory pics in post 7.

 

did you review and step thru the timeline for the model I up loaded?  questions?

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Message 10 of 14

wcarlsonM2NUS
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I have not yet, but I will step through the timeline.

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Message 11 of 14

wcarlsonM2NUS
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Enthusiast

I stepped through the file history several times. I don't understand sketchs 2 and 3. I don't see how they relate to the rest of the sketch.

I see you created half the sketch and then mirrored it for symmetricity. Ordinarily this would be great, but the holes on the other lug don't match.

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Message 12 of 14

laughingcreek
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@wcarlsonM2NUS wrote:

...I don't understand sketchs 2 and 3. I don't see how they relate to the rest of the sketch...


sketches are related/linked to each other with projections from previous sketches (purple articles.) projections are one of the most important tools to use with sketches.  if your not using them now is the time to study up.  there are several types, and they are all useful.

 

turn on the visibility for dimensions for all there sketches so your screen looks like this-

laughingcreek_0-1671729294426.png

DOUBLE CLICK on one of the DIMENSIONS, such as the one I have circled, and change it to a reasonable value.  what do you observe?  play around with all the dims and see what happens.

 

all the extrudes reference sketch articles using the START and EXTENT TYPE inputs in the extrude commands.  the result is that you can look at the model like in the pic above to make adjustments instead of digging around in features in the timeline, which gets increasingly difficult as projects get bigger. 

 

...I see you created half the sketch and then mirrored it for symmetricity. Ordinarily this would be great, but the holes on the other lug don't match.


then don't create holes that aren't mirrored till after the mirror feature.  put them in a sketch and extrude/cut after in the same way the other sketches and extrudes where made.

You can use the sketches already created, or create new ones.  I would still group sketches at the beginning of the timeline, and I would still put them on origin planes and not the faces of the solid.

 

 

 

 

 

 

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Message 13 of 14

wcarlsonM2NUS
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So sketch number 3 creates both lugs and a single set of holes that go through both lugs?

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Message 14 of 14

laughingcreek
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@wcarlsonM2NUS wrote:

So sketch number 3 creates both lugs and a single set of holes that go through both lugs?


currently, yes.  I had assumed a symmetrical layout of holes.  you can just do the lug without the holes by adding the profiles of the holes to the EXTRUDE2 feature.

laughingcreek_0-1671734087138.png

 

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