I have to change the bottom frame of my cart that is hss4X2 tubing to C4X5.4 Channel, is there anyway of changing the memeber without losing all the mates and having to mate everything together?
That really depends on how you structured your workflow and design intent. I always start my design with an open mind for changes. Seeing your feature tree would help in our evaluation..
should I just send you the file?
No - we have IT restrictions for downloading any files..... You can expand the feature tree and take snapshots
could you give me an idea of what to take shots of? it would take all day to post shots of my tree.
Mate datum planes only. If no custom features, faces, edges, temporary axis, and so on involved, all your mates are safe.
As John said, it's difficult to say without seeing more detail. Any mates that involve surfaces or edges of the frame will blow up. If you used planes you might have fewer problems, but that will require a lot of care also.
Did you make it using weldments? If so you should just be able to change your profile.
If not I usually right click on the components I need to change and select replace component:
You most likely will have to go through and re-select faces for the mates but from that image it's doesn't look like it would take more than 5 minutes to change.
That depends on if the parts are built in context.
As an experiment, you could save a copy of your assembly first, then try changing it and see what blows up. If there's red all over the tree, close and open up the original assembly from last save.
If everything looks ok you may just have to do minor tweaks or possibly none at all.
There may be some errors or goofed up mates but more often than not, it doesn't take long to fix them if there's only a few.
Here's another option, without knowing anything of your workflow or design intent other than you want to change structural member profiles.
Do not mate to objects you will want to change. Mate to a reference plane or sketch instead. Adjust reference entities to adapt the rest of the assembly to the new dimension or location. Then, nothing breaks when changing weldment profile. You could change to dissimilar profile shapes, and it'd adapt quickly but not automatically.
Doing this requires attention to design intent and implementation in advance, as you go, actively throughout, and most likely after any potential change. I recommend Skeleton Sketch Part method, which is better described in other threads. Search for that or SSP here on forums. It can be difficult to wrap your head around, and even more difficult to implement retroactively.
it's possible that I might not have to change the members which is really good news, I so first off thanks for the help and information from everyone and second,
Is there anymore advice for the proper way to mate things? I guess keep the mating of surfaces to a minimum? I find myself using width mate, distance mate a fare amount.
Like Vladimir said mate datum planes only.
If your Parts are symmetric, and it looks like yours are in at least in one direction, keep planes at the center, and use these Planes when mating whenever possible. With that being said, sometimes it's best to just go ahead and Mate to surfaces. If they blow up because of a design change just bite the bullet and fix them.
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