Yet, most can lift all that information transparently from the files, without having to manually repeat information in separate layers or add manual notes, it just seems to be a CAM issue on the fabs side. We try to minimize the engineering questions we get back from our PCB fab as just one of those slows down the entire process and this is part of that process. It is only for OshPark and Macrofab that I have to go to the extra, error-prone step of duplicating the callout on the mill layer. These are used on breakout boards and similar module style boards. The inside corners are rounded and the edge of the PCB is cut to the middle of the border line. This is because the smallest tool used for routing out boards is 1.0mm in diameter. The smallest inside corner radius possible at MacroFab is 0.5mm. Thus inside corners of cut outs will not be sharp but will have a round edge to them. That is all you need to do to denote the difference in your design files. This is similar to a drill placed in the center of a copper pad for a via. The example shows three different kinds of cut outs or routes external cut out, internal cut out, and internal plated cut out. I drew the cut outs on the dimension layer for Eagle which is Layer 20. Making the thickness of the lines a non zero number will reduce problems down the road with external gerber viewers. The board is milledcut to the middle of the line, so thickness of the line does not impact the result.
You can check after uploading to MacroFab by reviewing the Border Layer in the PCB viewer.ĭRC rules for cut outs and slots can be found on our Assembly Specification Page. If you are uploading an ODB package you will have to make sure the cut outs are drawn on with your border tool. In the EDA Tool Eagle this is generated from the Dimension layer 20.
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