3D Printing and Revit STL Files

I recently got an email from a fellow Revit user asking if Revit 2014 changed anything for creating STL files, specifically if we could define inches as the base unit. I haven't had the opportunity to print anything to a 3D printer via a vendor myself yet so I'm clueless.

He shared with me his current frustration which apparently has to do with a fairly automated process that his vendors offer. Apparently it is as simple as: Submit your STL file online and get your automated quote in return. It works great as long as the submitted STL file uses the correct units, which is apparently "inches". If you don't cooperate with the system you end up having to call each vendor and it takes a lot more time than necessary.

He was specifically writing about the STL Exporter for Revit from Autodesk Labs. It exports to the units "Feet" and there is no way to alter that presumption. I've asked about it with a couple friends at Autodesk and it is on their radar so hopefully they can provide an option, in the future, for defining the units of the file output.

Since I have no wisdom to offer him and I know that at least a few readers have experience with this process I'm curious what alternatives he could consider. Can some other application that can edit STL files let him change the units? Perhaps the vendors could make this easier for customers and provide a pricing routine that asks for STL units? Is it more complicated than it seems? Comments are welcome!

Export a Shared Parameter

or alternate title, "Road to Recovery"

When you don't have access to the original Shared Parameter's file there are two ways to get to it, via a family or in a schedule. Either way you need to be able to “touch” the parameter so you can use the Export option for shared parameters. Revit will add the parameter to the current shared parameter file you are using.

In a family you need to open Family Types, select the parameter, choose the Modify button.

In a project schedule you need to take a look at the view properties for the schedule, view the fields, pick the parameter, then click Edit.

In either case you just need to click Export and Revit will warn you that it will add it to the current shared parameter file you are using.

 

If the Export button is not active it is because you don’t have a shared parameter file selected yet. You’ll need to do so first. Go to the Manage Ribbon > Settings panel > Shared Parameters button, browse to find it or create one from scratch.

The only family type that doesn't play along with this scenario is titleblocks. Shared parameters that are used in titleblocks must be "connected" to a project by adding the shared parameter to the project as a project parameter too, since titleblocks are sort of a "tag" for views.

Saving or Sharing Export DWG Layer Standards

The process has changed a bit for exporting to dwg (or DGN for that matter). We used to be able to export our own settings to a .txt file format for use with other projects. In Revit 2011 we had this dialog and Save As button.

With 2012 they've decided to capture our settings in a project file itself. They let us choose one of these four standards to use, or to use as the spring point for our own version.

The fifth option is to "Load settings from file...". Interesting that there aren't any files to use though. We are to capture our changes in the project and then, when desired, pass it along to other projects via the Transfer Project Standards tool.

I've posted the source files that the four export settings templates use because they don't appear in my 2012 installation anywhere. I recovered them from my 2011 installation. Interestingly the other three besides the AIA version didn't show up until I loaded each one in to replace the previous. As soon as I did that, the other files appeared alongside the AIA version. If you really want to edit the .txt version, to grow your own version, you can download them here:

exportlayers-dwg-AIA.txt
exportlayers-dwg-BS1192.txt
exportlayers-dwg-CP83.txt
exportlayers-dwg-ISO13567.txt