Originally Posted by: NickB Sounds like you have a good understanding of layers, and the weaknesses of the current layer management tools.
well, I'd rather have found to know a tiny percentage of it. Is a bit startling since it turned into a very central tool I am using constantly. Also I thought CAD world's main concern always is work flow.
However being a software guy originally I could imagine that the layer tree structure might not been designed to cope with an extension like that.
Originally Posted by: NickB While modeling I have never come up against the upper limit of layers, even on project files that I have used for months and have grown to over 400 MB.
Indeed, 32000 layers seems more that enough. Given the limitation you describe I begin to consider splitting up my models into serveral files containing all submodules. Would require importing submodules into a full assembly file, but maybe its easier to handle for larger projects.
Originally Posted by: NickB Not being able to re-arrange layer structure is a huge problem, and like you write short of moving the contents of each layer individually there is nothing that can be done. Worse, if you do start changing layer structure by moving objects and controlling construction geometry from layer to layer you stand the risk of breaking a parts history, particularly if you delete the starting layer. An example: two solids created on two different layers, boolean together and delete one of the originating layers. With a simple block it does not blow up, but if there is complex geometry and constructions involved it often does.
Maybe I had a similar issue once as I assigned structure to a different layer but the source layer was left with objects (I saw the count in the concept explorer), but no object were visible. I had no idea what that was or how I could find out more about it, so I ended up with reloading my backup copy (thats what I tend to do now very often when I am dealing with an area I do not feel fully confident in)
Originally Posted by: NickB In practice I have a pretty good idea of what type of layer structure I am going to need for a project, and try to flesh out the outlines of that structure before I start modeling. Usually this works well, but sometimes when I think I am going to be making many iterative models I find myself with a structure that is deeper than I need.
Unfortunately I more often that not end up with something completely different than initially expected. That's part of the reason to use CAD in the first place, because its so much cheaper and quicker to find the mistakes in my design ideas before actually building the stuff.
Originally Posted by: NickB By using the object tools rather than the layer tools to show and hide I don't accidentally blow away the settings on layers that I can't see, or want to to turn on and off as a group.
Thanks, good to know. I had been using them quite intensively as well.
Originally Posted by: NickB
I did that, but I would not enter the project details. Copying them from within the same file would allow me to select the closest one for the other drawing, so there would be just the part name field being different.
Regards
hans