Using a 3D printer to make its own heater by leadinglights

As an alternative to using photographic techniques to make a heater PCB for a Reprap or similar 3D printer the copperclad laminate can be marked for etching with an etch resist pen using the 3D printer itself to do the marking. The plotting in progress can be seen on https://www.youtube.com/watch?v=XfjI_UXrnJ8

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