You can, of course, change the default assignment in PCB Visualizer using the functionality provided in the Buildup selector If you prefer to send Gerber and Excellon files, please follow these basic rules to avoid data issues. Layer 44 – Drills and layer 45 – Holes are combined to give the correct drill layers (plated/unplated/blind) Layer 46 – Milling - Rout for additional cutouts. By default, PCB Visualizer always assigns EAGLE layers (if present) to the Buildup as follows: 20 – Dimension - Used to detect the PCB Outline 29 – tStop - Top soldermask 30 – bStop - Bottom soldermask 21 – tPlace PLUS 25 – tNames – Top legend 22 – bPlace PLUS 26 – bNames - Bottom legend 31 – tCream - Top solderpaste 32 – bCream - Bottom solderpaste Individual EAGLE copper layers are automatically combined with layer 17 – Pads and layer 18 – Vias to complete outer and inner layers. These 2 layers are automatically combined with the copper layers of EAGLE to generate a complete layer image (the copper layers in EAGLE only contain traces and polygons, no pads). It is available in both a free and paid version, with the free version including a few design restrictions related to the number of sheets, number of layers, and board area a PCB project can contain. IMPORTANT NOTE: 2 EAGLE layers are NOT visible as separate EAGLE layers in the Imported layers section: “17 – Pads” and “18 – Vias”. Autodesk EAGLE is a cross-platform CAD application that engineers and hobbyists use to design Printed Circuit Boards (PCBs). ![]() ![]() There you can assign or un-assign the EAGLE layers to the Buildup as required.
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