If it happens to be a problem too often, it could be a good excuse for making a special Altium script, I suppose. At at least it's pretty obvious when 3d bodies and courtyard layer primitives end up in the wrong layers. Will have to see how well the new layer types feature actually works, in keeping this stuff together.

A shame that it seems these different settings are going to become the *default* for new Altium users, though. So at least I can keep things inline with the rest of my parts lib for now, it's only using parts from other people using different settings to generate footprints that needs to be considered.

and mine seem set to what they have always been. had a quick look in my AD19, and it looks like the wizard has a dropdown list to select the mech layers to use for courtyard, assembly and component body info generation. have Altium changed the mech layer use for the IPC wizard? I hadn't noticed this yet - but I haven't used 18 or 19 that much, and may have only used it with my existing dblibs, come to think of it. PCB fab houses require this when the order is made.Oh no. In your email with these files, you also need to tell me the board dimensions in INCHES (x by y). This README.TXT tells the PCB fab house how to correlate files to layers. By default, a component is always created in the library from the top layer perspective, and the component is initially placed on the top of the PCB layout. This is especially useful for matching layers representing the top and bottom of a particular layer representation. OLN (board outline, rename whatever layer used for the board outline to be something.OLN). Mechanical Layer Pairs Most PCB tools can match the layers. GBO - bottom overlay (silk screen) - only needed if you have silk screen on the bottom of your board. You may also want to create a README.TXT in this directory with contents of: The pcbfiles directory will now contain all of the files needed by a PCB house. Also copy whatever layer you used for the outline line layer and give it a file extension of. Also copy the NC Drill/.TXT file (this is the drill file for the holes in your PCB).

If you have bottom overlay, then you also need to copy the Gerber/.GBO file. Make a new directory called pcbfiles, and copy Gerber/ files. After clicking on the Generate button, a compressed zip archive will be created that has two directories named Gerber and NC Drill.

Mechanical layer altium