Problems with BOUNDARY

[y_chang]

I'm working on a lot of custom parts for a curved wall that I'm trying to get out to our CNC. One of my engineers is modelling the parts in Fusion and sending it to me as various formats all of which have issues. When I break down the parts and try to generate Pline boundaries for extruding I get the error that the boundary can't be found and the option to create a region which only works half the time. 

I have been able to get his 3D models broken down into regions but on my end I need to separate the holes and extrude them to a different height than the other parts so things need to be exploded. My thinking was to BOUNDARY the regions but AutoCAD absolutely cannot consistently handle this. In addidion to getting incomplete regions, I will also get the computer to "think" for long periods of time trying to find these boundaries which is another source of frustration. 

The regions will break down into splines (which were generated from a template from the job site) so I can't PEDIT them into plines otherwise I get a bunch of straight segments instead of a real curve.

I've had no issues with this in the past and really, we're talking about two lines and two curves that make up these geometries so it blows my mind that this is this difficult. When compounded with the general wretched performance of AutoCAD when a simple 3D model is introduced to a drawing, I really really wish we had a proper post to get the parts out directly from Fusion. 

[pendean]

BOUNDARY command works exactly like HATCH command does: when you ask it to find a boundary and leave on screen a lot of irrelevant items to the boundary creation, it can take forever for the program to figure it out on its own.

Either start freezing unneeded layers and temporarily hiding irrelevant objects off screen, or manually draw the boundary yourself with PLINE and other drafting commands if it truly easy as you state.

Give it a shot.

[y_chang]

This is my understanding too but it seems even with isolation of geometries, AutoCAD struggles. I haven't turned off all the layers though so that's something to try. Maybe my use of BOUNDARY has been non-conventional but I always thought it was to simplify multiple lines to one closed geometry and that's how I've been using it. This allows me to extrude a 3D geometry to send to the router that the router won't spit back at me. 

[y_chang]

Does anyone know if there is an issue with SPLINES interfering with the finding/creation of boundaries? When I explode these parts, the curved lines become SPLINES and I close all the corners by overlapping the lines and still get the same issue. When I HATCH the area, the hatch actually jumps the borders of my closed space. I see no vertexes that are open anywhere. I considered PEDITing the splines with a bunch of vertexes but the visibility of these structures would probably make the notchiness noticable. 

An I wish I could generate these things from scratch using plines and arcs but custom template of an elipse would make that tough. 

[pendean]

Post a sample DWG file, we can help you decipher the problem(s) better that way.

[leeminardi]

Note, when performance is an issue it is better to freeze layers rather than turn them off.  Layers that are off are still maintained in memory, frozen layers are not.  Some commands will recognize geometry on off layers but not frozen layers.  More info here...

[y_chang]

I might have deleted the example above but I will try to recreate it b/c I want to know if this will work or not. I've already moved forward and was able to dissect the 3D models from my coworker and use the remaining regions to achieve what I needed to and the parts are being cut right now.