Is it possible to have a concentric "mate reference" that has the "Lock Rotation" option pre-set?
I don't believe so, but it is possible to Lock Rotation on all Concentric mates in an Assembly with one operation. Right-click on the Mates folder and choose "Lock Concentric Rotation" from the drop-down. That's what I typically do after Mating several pieces of hardware. This will of course need to be repeated any time more Mates are added, or you can wait until the Assembly is finished and get them all at one time.
Wow, that's handy. I wish I had known about that earlier.
On the subject of locking rotations, does locking a concentric mate add much to the assembly's rebuild time? I know that, essentially, the more mates you have, the slower your assembly will be, but I've never been sure if locking the rotation is treated as a "full-blown" mate. I don't like leaving parts undefined, but some of our larger assemblies go so slow that I'm starting to wonder if I should stop locking rotations to help boost performance a little bit.
Austin Broeker - if you have a lot of hardware and your using 2016 or 2017 move the freeze bar down so the part don't get rebuilt every time you need to rebuild..
Ah, I always forget about the Freeze Bar. I have it enabled but I never think to use it. I'll have to slap a giant sticky note on my monitor to help remind me...
I'm still curious about how locking the rotation of concentric mates compares to leaving them undefined though.
Basically locking the rotation is automatically adding a mate and the problem with adding mates - they add time and take up resources. Some people are stuck on, no under defined parts or assemblies in any form, from sketches to mates and I'm one of them. Now here I don't have big assemblies so it don't matter, if it would matter then I definitely wouldn't lock those fasteners..
John Stoltzfus wrote: Basically locking the rotation is automatically adding a mate...
John Stoltzfus wrote:
Basically locking the rotation is automatically adding a mate...
Thanks, good to know. I will definitely have to make our team aware of this.
One minor issue with not locking rotation is that any balloon leader attached to that part will move if the part is unintentionally rotated.
Thanks Glenn, that's very helpful!
Kenneth Barrentine - 100% with Glenn Schroeder on his reply, but just to add to his note - all you need to do is select the Mate Icon in the feature tree, right click and select "Lock Concentric Rotation"
Thanks John, I got it.
I just have to be mindful of other concentric mates that are locating components.
I might want some of those concentric mates to be free to rotate or rely on other mates to lock the rotation.
Kenneth Barrentine wrote: Thanks John, I got it.I just have to be mindful of other concentric mates that are locating components.I might want some of those concentric mates to be free to rotate or rely on other mates to lock the rotation.
Kenneth Barrentine wrote:
If speed and effort is an issue (and when isn't it?) then you might consider the big picture of what is most prevalent - Concentric mates locked or unlocked. If you have a bunch of fasteners that you want locked and only a few other things with concentric mates that still need to be unlocked then lock them all in one fell swoop and then unlock the few that need to be free. I have not tried it, but it might be possible to group all the fasteners into a single folder (that is simple enough) and just lock them by folder.
As far as determining the impact of locking on speed, here is an EASY way to find out how it affects you and determine if the small price of time is worth it to you. In your assembly go to Tools ==> Evaluate ==> Performance Evaluation. There is a ton of information available here. Go about halfway down to Rebuild Performance and look at the Assembly Rebuild Report. Compare the times in this report with and without the large group of concentric mates locked. If you go further down in the Perf Eval at the very bottom you'll see Statistics. Look at the two lines: Number of Total Evaluated Mates, and Top Level Mates. Hint, for the sake of not having to redo a lot of work you might make two configurations of your assembly, one with the mates locked and one with the mates unlocked.
If you would please, report your findings.
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