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Autorouter set to route SMD components onto other layers must have SMD components layer enabled for routing.
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andyfierman 1 year ago
To Autoroute SMD components, the layer that those SMD components are on **must** be selected in: Router Layers > **Configure Layers** If that layer is not selected then the Autorouter cannot route a short segment of track from a single layer pad on the SMD component to a via to then transfer the routing onto any other layer. Here is the schematic for a simple project with 5 through-hole in a circuit and 5 SMD resistors in the same way in a copy of the circuit. ![image.png](//image.easyeda.com/pullimage/6eWu31RO0RrhFe0ia0aT7wNrKHIighTilcqGEYTh.png) And here is the PCB: The SMD resistors are on the top layer. The (Local) Autorouter is set to route on the bottom layer only: ![image.png](//image.easyeda.com/pullimage/Ca6gNxz7Ha70AASKjTw6hZa0x9c84wwZKw4ybG8b.png) ![image.png](//image.easyeda.com/pullimage/9eZl8xe3Ey1WVoOS21YoZnPKj0vP5zrqwZmNFQeD.png) Only the 10 connections to the through hole pins are attempted and completed. No attempts have been made to route top layer 0603 SMD resistors on bottom layer. ![image.png](//image.easyeda.com/pullimage/H1pZzD5F7ebwQihu1eCALbHkB4JK2bO6FAaOCcKj.png) Through hole resistors on top layer route on bottom layer only with no problems but no vias are placed to route top layer 0603 SMD resistors on bottom layer.
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