Reset Revit origin

[ron.sanpedro]

We have established a general rule that the intersection of Grid A and Grid 1 is the Origin. To facilitate this I have a DWG with crossing lines at 0,0. I link this in to Revit origin to origin, and now I know where to put my first grids. This is really helpful when exporting to DWG for consultants, because the backgrounds xref someplace rational, rather than some random point off in space. And given that we will have to deal with DWG based consultants for a long time to come, making this work is pretty important.
All of this is great, until half way thru DD you really do just need to move Grid 1 a few feet. My current approach is to move the grid, then go thru a process of adding the whole building and the grids to a group, move it all back the same distance the grid moved, then ungroup and proceed to fix all the annotation that got screwed up.
Now I know I can reset my shared coordinates by linking in that DWG and acquiring shared coordinates from it. But how might I more efficiently reset the internal Revit origin? Any hope for something less painful?

Thanks,
Gordon

[sbrown]

I would recommend just leaving the exports alone. as the consultant team allready has them established. 0,0,0 in cad/revit doesn't need to align with a grid, its nice but as long as all dwg's share the same 0,0,0 there won't be issues. If you do move your model you'll mess up the consultants drawings to.

Basically you should never use something that may move as an origin. thats why we usually just set 0,0, down and to the left of the building.

But to answer your quesion. NO you can't move the origin.

[david.kingham]

Not entirely true scott, you can change the shared coordinates origin, this only applies if you export using shared instead of project, see Nick's post here http://forums.augi.com/showthread.php?t=76426 we were talking about navisworks but it the same scenario really

[Phil Read]

Hi Gordon -

As you've discovered, predicting an origin that doesn't move isn't possible. Furthermore - projects often have to adhere to many origins - the building grid, the site grid, the city grid and so on.

You can create multiple user defined origins in Revit. They're called Shared Coordinates (the Revit internal origin is the Project Coordinate):

1. Create your user defined coordinate(s)
2. Before exporting, make sure that the coordinate system you want to export is set to "Current"
3. When you export, make sure that the Coordinate System basis is set to "Shared" rather than Project Internal.

See attached Flash file.

Regards -

Phil