topic Re: fundamental problems with assemblies in Fusion Support Forum

fundamental problems with assemblies

Anonymous — Fri, 28 Feb 2020 10:02:24 GMT

We have two stations with Fusion 360 and the same terrible CAD problems in assemblies:
1. we can't to freeze definetly component's position - anybody can take and move each component from his placement;
2. we can't to replace a component by his newer version (for i.e.as in Inventor) in the same position;
3. we can't right update the assemblies by newer files from server (when we see yellow triangle warning sign), because after the update many components change their positions in different directions and their relations/constraints/freezing are not working;
4. when we start the sketch in the assembly plane, many components change their positions in different directions and their relations/constraints/freezing are not working;

These type of problems are totaly fundamental for our decision about the CAD working future. If you can not resolve the problems, we will have to change the CAD system.

Re: fundamental problems with assemblies

TrippyLighting — Fri, 28 Feb 2020 10:18:25 GMT

Can you share an assembly ?

I have no problems creating properly functioning assemblies and based on my experience the problem isn’t the software 😉

Re: fundamental problems with assemblies

Anonymous — Fri, 28 Feb 2020 12:04:14 GMT

Hi, thx for the answer. I can't share you this client's assembly, but till tomorrow I will create a new one simple assy with the same problems and this file I can share you if you wish. Probably we don't know something important about F360.

ps. Can you replace any components by e newer simillar version in assy - as in Inventor for example ? In Fusion forum I found only short note - it is not possible/you have to add a new component, make constraints to older one and ...after that to delete older component. It's problem for us, and constraints in assy are destroyed by that idea.

Re: fundamental problems with assemblies

TheCADWhisperer — Fri, 28 Feb 2020 13:04:51 GMT

@Anonymous wrote:
ps. Can you replace any components by e newer similar version in assy - as in Inventor for example ?

I could be wrong, but I don't think you are going to find the equivalent functionality in Fusion.

Attach your dummy set of files for experimentation in Fusion.

Re: fundamental problems with assemblies

Anonymous — Fri, 28 Feb 2020 14:14:07 GMT

Unfortunately I was talking with Autodesk local support - exactly in Fusion we can not replace components as in other CAD as Inventor. Only manually put the second component and make constraints to older one, after that we have to delete older component. Unfortunately a new component have not any constraints as the older one.

Re: fundamental problems with assemblies

jeff_strater — Fri, 28 Feb 2020 18:14:25 GMT

correct. Fusion does not yet support Replace Component. But all other of your "fundamental problems" should be addressable using common Fusion assembly practices such as Joints, Ground, and Rigid Group.

Re: fundamental problems with assemblies

jhackney1972 — Fri, 28 Feb 2020 18:36:08 GMT

If you switch to using “linked components” in your assemblies, you can solved a lot of your replace problems with the Save As and Replace command. Take a look at this blog post to see it is action from the included video.

Re: fundamental problems with assemblies

jhackney1972 — Fri, 28 Feb 2020 18:45:45 GMT

Sorry Jeff, I meant to direct my post to @Anonymous

Re: fundamental problems with assemblies

TrippyLighting — Fri, 28 Feb 2020 18:56:41 GMT

@jhackney1972 wrote:

If you switch to using “linked components” in your assemblies, you can solved a lot of your replace problems with the Save As and Replace command. Take a look at this blog post to see it is action from the included video.

Yes, but you also lose a lot of the speed inherent in top-down design workflows, which is Fusion 360's strength.

It also does not really address the problem it rather evades it!

Re: fundamental problems with assemblies

Anonymous — Sun, 01 Mar 2020 00:54:11 GMT

please check this assembly -

https://a360.co/2wRDLX4

here I can move each component, also grounded

Re: fundamental problems with assemblies

jeff_strater — Sun, 01 Mar 2020 01:12:50 GMT

can you post a video of what you are seeing, and describe what you think is incorrect? I am unable to move the grounded components in this design. How are you attempting to move things? Dragging a component? Or using the Move command? If you are using Move, are you sure that the move type is set to Components?

Re: fundamental problems with assemblies

TrippyLighting — Sun, 01 Mar 2020 01:45:49 GMT

@Anonymous wrote

... here I can move each component, also grounded

I don't see that at all in the assembly I downloaded.

Re: fundamental problems with assemblies

Anonymous — Sun, 01 Mar 2020 13:09:16 GMT

In film you will see my Fusion version, Lenovo E590, and drag moving of grounded sub part.

Interested - only part from grounded subassy I can move by mouse drag, but after ground of 1st level component I can not move it. https://youtu.be/eYY_UfzlCWg

Re: fundamental problems with assemblies

jeff_strater — Sun, 01 Mar 2020 14:57:31 GMT

I don't think you sent us the correct design. This is the top level of the design from the link you sent:

This looks much different that what is in your video:

I think you sent us only the sub-assembly.

However, I think the key is in your explanation: " part from grounded subassy". You have applied the ground to the subassembly, but that does not ground the child components under that subassembly:

You need to apply the ground directly to the lowest-level components (or perhaps create a rigid group, and ground just one of them)

Re: fundamental problems with assemblies

TrippyLighting — Sun, 01 Mar 2020 15:41:56 GMT

Please use the Autodesk screencast tool. We have some minimum standards here on the forum! This isn't Facebook!

I have a hard time looking at a video taken with a handheld phone in portrait mode.

Re: fundamental problems with assemblies

Anonymous — Sun, 01 Mar 2020 15:58:23 GMT

Thx for the signal.

It is strange two times - 1st because I uploaded and shared you whole folder. 2nd because in the subassembly all 4 components are grounded, but after putting into new higher assembly I see the same files ungounded !

Here you can see screenshot of the correct assembly numbered _a0

The hand drag moving of subassembly components is blocked only after re-grounding these subcomponents.

Do you know why we have to ground again the same all subcomponents after putting their subassembly in new assy ?

Re: fundamental problems with assemblies

TrippyLighting — Sun, 01 Mar 2020 16:07:29 GMT

As opposed to any other CAD systems I am familiar with in Fusion 360 all components by default float.

So you'll have to ground them. However, grounding is only local to that assembly.

You can also use a rigid group joint between the component and the top-level origin. That is maintained when you inert the design into another assembly.

What grounding does it that it locks the origin of the component to the top level in that design.

However, when you insert that design into another design, that grounding becomes irrelevant.

You can also only ground an assembly if you make sure that the components in that assembly are joined to the origin of that assembly.

90% of "strange" behavior in assemblies is down to not managing component origins properly.