Having trouble with Fusion in general

[Anonymous]

So I'm having a bit of a workflow crisis with Fusion in general.

If I go top-down and just blast out stuff without a care in the world, it works out okay, but parametric relationships are terrible and none of the parts are drawn 'as manufactured.' This works out OK.

If I go 'bottom-up' and draw really concise 2d sketches I get really slow sketches and Fusion does a terrible job of handling constraints. I can't get a well functioning 2d sketch like is required of you in a program like SolidWorks. Then when I go back to make changes the whole thing explodes.

It seems like I can go willy nilly making random stuff and it works, but it's nothing manufacturable. Or I can go step by step and make something manufacturable but it's impossible to make changes.

I don't know what I'm doing wrong and it's extremely frustrating.

I'm at month 4 with Fusion and still feel like I'm making fun shapes and nothing that's real.

[Anonymous]

Dude, you just straight up designed an assistive device? That's awesome! 

[Anonymous]

Try to shorten the length of "chassis" by changing Chassis-Sketch5 or the width of the 4 extrudes in Chassis-Sketch6.

[daniel_lyall]

I realy like when someone makes an assistive and all they say is I made a assistive divices wish there were more people around like that who just make one and say they did it and dont make a big deal about it good stuff luke.

I realy get pissey when I need something I get told no cant get that cost to much espesily when a disablity supply company buys some thing for a $1000 and sells it for $10,000 and has the company that make it locked in a contract to sell only to them.

[jeff_strater]

Well, the good news is that it's not the edit...  The bad news is that the model has errors before you edit.  Just Compute All show the problems.  So, my assertion that I could fix your model easily is proving to be a bit hasty...

This will take some study.  Clearly the thing computed at the point it was created, but somehow we are seeing compute failures.  The failures I see are:

Fillet6 on Fingers

Combine5 and Combine6 on Fingers

Fillet9 on Fingers

DeleteFace2 on Fingers

Fillet10 on Fingers

Sketch2 on 3d print supports

Extrude2 on 3d print supports

Extrude3 on 3d print supports

Combine2 on 3d print supports

Mirror1 on 3d print supports

Combine4 on Chassis

We will take a look.  Thanks for sharing the model

Jeff

[Anonymous]

Wow, I don't know what blows my mind more, the drawing or the actual mechanical design of that recorder thing!  And then you're going to 3D print that, amazing

[Anonymous]

Yeah, it's a real shame empowering useful stuff often costs so darn much.  Not so with Fusion though!  And I read earlier you were designing and fabricating some pretty nice stuff for your laptop and what not, impressive stuff too. 

[daniel_lyall]

problem being I cant shear it yet I have to work out how different it is to what is available and if whats available has a patients on it most of what I have found so far is in inch, so doing it in metric with different type of nuts and bolts and a different way of adjustment it might be OK.

as I come across something I need I draw it up and check if I can release the drawings so far I cant unless someone else has done it and I copy there idea as they will be in the poo not me as I am copying there work, its very trickey to get it right also I don't what to stuff the company's that make the stuff and got there self locked into a contract with one of the rip of medical supply company's,

there's move under way in NZ for a outfit to take all the contracts of the medical supply outfits in NZ and only sell stuff at a small profit not a 900% profit.

I will be making the laptop table next week its not something hard to do just need a lathe and a mill to do it what I have access to.

that's my rant this week

luke sometimes when I do a drawing it goes funny what is a bug in fusion its hard to spot when it happens it does not happen all the time If I spot it in time I have to delete what went bad and save and shut fusion down I have had to restart the computer onces to clear the bug, if I dont catch it the whole drawing goes made if I change something down the line.

what usely happen is a line or a hole will put it self into the drawing when i press pull its even happend in a squire i had a line in the middle of the squire what I did not put there if I undo and press pull again the line or hole comes back  

[LMD001]

Hi Luke,

Doing fillets and chamfers at the end of the design is a modelling "rule" since many years, it still applies so it seems.

Downloaded your model for the recorder assistive device, pretty impressive I must say. Can you elaborate on how it will work? 

Managed to clear some fillet warnings by unchecking "tangent chain" but that's about it.

Best regards,

Ludo

[Anonymous]

Daniel, could you maybe upload an example f3d file sometime showing difficult behavior, such as a hole reappearing as you mentioned?  It's interesting to try figuring out why a problem is happening.  I read though especially for a Mac you need to zip the f3d file to upload it in this forum.

Jesse

[daniel_lyall]

I will try to remember I forget each time it has happened has not happened since the update a couple days ago

[Anonymous]

@jeff_strater Interestingly enough, I did a recompute when I first opened that file... it worked fine. Did another recompute and it broke. Opened it again and did a recompute and it was fine.

@LMD001  yes, that is true, except in other CAD programs you can do these things at the end of your part. In Fusion I am finding you must do it at the end of your ASSEMBLY. 

 Here's a photo op of the part after print. 🙂

[LMD001]

Nice piece of work Luke, love the 3D print!

When the fillets and chamfers are cosmetic, it actually does make sense to wait with edge treatment, you avoid all kinds of funny things with the filleted edges as referenced geometry, I try to wait till the model is almost finished.

And yes you are absolutely correct: some modellers are more forgiving.

Like with every tool: learn the limitations, but ergonomically speaking, it should not be that way.

Best regards,

Ludo

[Anonymous]

I think combine is my favorite tool in Fusion. Combine allowed me to move those 'fingers' into position and subtract the interference. This allowed me to build max and min rotation constraints into the model very quickly and easily... and it worked really well for this complex lofted geometry where each part is slightly different. Amazing!

[LMD001]

So Luke, besides a few oddities, can we say, a big kudo for Fusion 360?

Like I wrote before: in the end it is about getting things done, and you did.

Best regards,
Ludo

[Anonymous]

That is one tricked out recorder.

[Anonymous]

tons of loft issues. I know this profile isn't exactly simple, but I always find I use lofts for complex parts that can't be drawn really any other way.

So many issues I can't reproduce them all or recall them all.

Basically offset sketch doesn't create closed sketch geometry. And when I do extend to try to fix it I get sketch warnings. And it's really difficult to find the geometry that's causing the issue because the arcs wont extend either.

It throws soo many errors.

I can't loft from the existing body faces (which is from a loft & extrude) without errors.

I can't project the geometry and offset 1mm or .5mm but I seem to have been able to at .75mm. It's a total cluster.

So here's the file and some images!

[TrippyLighting]

Try this

[Anonymous]

Hey Peter! Glad to see you on here again, hope all is well.

Sorry I didn't make it clear, I was trying to loft the inside profile. The outside profile was just left over from the projection. 🙂

[Anonymous]

I was sitting here thinking about linked designsin Fusion... I think this is going to be a game changer for this software.

The way Fusion is now, it's extremely powerful... EXTREMELY! powerful for sub-assemblies or basic assemblies. Where it starts to have trouble is when you are getting into larger assemblies, especially in history mode it's completely insane trying to get through everything. If you make changes the whole thing has to recompute etc etc.

So the idea of getting documents that contain sub assemblies linked into Fusion is a very exciting one because I think it will fix a lot of workflow issues and speed issues in this area.

I would only add that I hope Fusion team offers a way to make a linked in document "static." And by that I mean take all the steps necessary to make it so it is treated as a single body that cannot be edited or have the joints move. The reason for this would be to greatly speed up working with large assemblies by turning off darn near everything that requires a solver. You can open up the document containing the sub assembly if you need to make those edits.

Just some thoughts.

[Anonymous]

the topic has to be changed...:)