Large assemblies

kustaa_nyholm096

I've been following the Marble Machine X saga on Youtube

https://www.youtube.com/watch?v=9zL8pRDxPck

and lately there came up  the discussion on Fusion 360 and  its inability to handle 'large' assemblies:

https://forums.autodesk.com/t5/fusion-360-design-validate/fusion-360-unable-to-handle-quot-large-quot-assemblies/td-p/6701462

Since I'm not active (anymore) Onsape user I'm asking here out of curiosity what would be a 'large' assembly in Onshape and at which point it would be design road block.

cheers Kusti
 

kustaa_nyholm096

Interesting! No one has stepped forward to say "I've got performance issues with an assembly of N parts" or "I have an assembly of M parts and have not experienced problems". Surely there must be people who have large (what ever that is) assemblies, it cannot be that Onshape is used by just toy projects...

owen_sparks

I've seen OS staff demo assemblies of complete radial engines so I believe the limit is "quite a lot". 

Most of my assemblies are dinky so I can't comment more than that, but in the not too distant future I'll be modeling our factory...

Cheers,

Owen S.

3dcad

I think most of Onshape performance issues raise in part studios growing too big for fast regeneration, mainly because they are so handy that people create too much stuff in part studios that should actually be made of multiple part studios, sub-assemblies and main assembly.

3200 components with many duplicates is perfectly fine.

To be honest I haven't yet found limits of Onshape assembly, they have improved performance a lot after beta days though. I have found limits of single part studio and sketcher (using imported dwg). 

This assembly takes a bit to load but once ready it runs smoothly on pc and also on laptop. Samsung S6 usually ends up closing Onshape app.
With $399 Chromebook it's usable but doesn't run very smoothly.

daniel_cook

I've worked in a model with 8,600 part occurrences (1,815 unique) and it works well, not great, but usable in Onshape on desktop. On mobile (Galaxy S8+) it just crashes out the app.

At this point I definitely was hitting hardware limitations (~10GB ram utilisation and ~2GB GPU ram utilisation) that weren't related to Onshape, but purely hardware before I upgraded systems.

I do think once the assembly gets large, you need to closely monitor system utilisation and see if hardware is being maxed out.

MBartlett21

3dcad said:

@3dcad

How do you get this?

daniel_cook

Ctrl-D

Same shortcut as a bookmark.

kustaa_nyholm096

Thanks guys! Just the sort of testimonials/feedback I was looking for.

MBartlett21

daniel_cook said:

Ctrl-D

Same shortcut as a bookmark.

@daniel_cook

It is a bit annoying that it also adds a bookmark.

It is the same situation with the Ctrl+U shortcut for reporting a bug. It opens up the view-source page

NeilCooke

On Windows you have to press is twice (apparently). That’s one advantage of Mac having separate control and command keys. 

MBartlett21

NeilCooke said:

On Windows you have to press is twice (apparently).

@NeilCooke

I don't have to press it twice. It does both actions

john_mcclary

Check out the public documents and see for yourself.
There are some pretty cool large assemblies you can find there and you can see how your hardware will handle it.

https://cad.onshape.com/documents/2d5c0c72cf8a49f59d60fb1b/w/a005335084f044cfae483209/e/089ef407bf5e40ac8ab5b6b4