topic Re: Are all the sheet metal bodies rigid grouped by default? in Fusion Support Forum

Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sat, 21 Sep 2019 16:26:07 GMT

I'm designing a CNC. It has a linear rail(a) rigid joined on a sheet metal frame(b).I want a different sheet metal body created in the same design (same rules)(c) to be attached to the moving "guide"(d) of the linear rail.

When i try to make a joint, it's resulting in conflict. When i suppressed the joint b/w rail and the frame (a&b) It works fine, but the rail moves out of place. It looks as if all the sheet metal bodies created in a design are rigid grouped by default?!

Is that the case? What am i missing? any solutions?

Re: Are all the sheet metal bodies rigid grouped by default?

HughesTooling — Sat, 21 Sep 2019 16:47:50 GMT

I see what you mean. That doesn't seem right. I've attached an example file to save support some time replicating this. @jeff_strater is this intended behaviour or am I missing something as well?

Mark

Re: Are all the sheet metal bodies rigid grouped by default?

jeff_strater — Sat, 21 Sep 2019 17:53:30 GMT

@HughesTooling - I'm not sure I get it yet. What I see in your model is two components. The first Rigid joint binds those two components rigidly together, and remove all relative degrees of freedom between the two. If you try to create a second rigid joint between those same two components, I would expect an error to result. Here is a screencast showing that behavior with two regular components. Am I missing something?

Re: Are all the sheet metal bodies rigid grouped by default?

HughesTooling — Sat, 21 Sep 2019 18:29:19 GMT

Sorry, I thought the first joint was between the document origin and the first component. Pretty sure I hid the second component when creating the first joint so not sure how the joint ended up between the 2 components. Just tried again and think I only hid the body and the joint command makes the second component's origin visible.

You can see here the document origin is on but the joint is created to the second component's origin even though it hidden in the browser. My mistake, guess @prdevadathk3 will need to share his model as well.

Thanks Mark

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 05:13:56 GMT

The rail is rigid joined to the sheet metal frame. I can't click and drag the sheet metal body i want to join to the moving guide. Nothing in the design is grounded. The sheet metal part i wanted to join was created in the same design as the frame.With the same rules. I can't select the sheet metal body first to join. i had to select the rail guide.

The "joint" dialogue box and error messages are not visible in the screen capture (done using windows game mode) But, you can see the warning inn the timeline.

It looks like all the sheet metal bodies created in a design is rigid grouped by default.

@jeff_strater

Re: Are all the sheet metal bodies rigid grouped by default?

HughesTooling — Sun, 22 Sep 2019 10:08:11 GMT

It looks like all the sheet metal bodies created in a design is rigid grouped by default.

@jeff_strater

Are you using a separate sheet metal component for each part\body? If all bodies are in the same component then they can only have a single joint.

Mark

Re: Are all the sheet metal bodies rigid grouped by default?

TrippyLighting — Sun, 22 Sep 2019 12:34:32 GMT

@prdevadathk3 please share your model!

Export as .f3d and attach to the next post.

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 13:17:46 GMT

But i can't convert a sheet metal body to a component right? This is what i get when i try.

Re: Are all the sheet metal bodies rigid grouped by default?

TrippyLighting — Sun, 22 Sep 2019 13:18:34 GMT

Share your model!

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 13:23:44 GMT

Unfortunately, this design is for a client. He's not happy with me sharing the cad model. I have signed NDAs for this. (I got permission for sharing pics/ vids in this forum to troubleshoot)

But i can design off a similar assembly to replicate this issue. I'll share that shortly.

Re: Are all the sheet metal bodies rigid grouped by default?

jeff_strater — Sun, 22 Sep 2019 13:48:19 GMT

I think @HughesTooling 's question is the critical one - do you have a separate component for each sheet metal component? If all the bodies are in one component, they will be rigidly joined by definition. I can assure you that you can create and join separate sheet metal components - they are not all rigidly grouped together.

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 13:48:59 GMT

Here you go!

Try rigid joining the small sheet metal body ("Extruder mount") to the rail block ("MGN12Hblock")

Both of the sheet metal bodies are created in the same design with the same rules.

This issue gets solved when i insert a sheet metal body from a different design into the design. But i want to design the sheet metal body in the main assembly design so i can design it easily around other components.

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 13:59:48 GMT

But how can i convert a sheet metal body into a component?

when i right click (on the body in the design tree) > create components from bodies , i get this error message ( see attached. notice the browser tree. )

I searched on google but didn't find a solution.

Re: Are all the sheet metal bodies rigid grouped by default?

jeff_strater — Sun, 22 Sep 2019 14:01:35 GMT

This is the difference between bodies and components. You cannot create joints between bodies, only between components. And yes, if a component (even the root component) has more than one bodies, those bodies will all move together. You will need to create separate components for "Frame plate" and "Extruder mount"

Re: Are all the sheet metal bodies rigid grouped by default?

prdevadathk3 — Sun, 22 Sep 2019 14:34:43 GMT

Thank you. Found the solution!

First, i have to create a new sheet metal component before i use the flange command. (create > new component)

That was the key. I'm totally new to sheet metal. thanks for the help!