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Double sided board etch file problems #2-layer


 

I have a newly designed circuit board using mainly SMD components with just? few through hole connectors as well.? The board is double sided to allow connection to the TH components, and 1/32" rivets provide connections between top and bottom layers.? Eagle revision is 9.6.2.

Running "pcb-gcode" with options set for top mill and stencil and both top and bottom outlines,? generated all the top layer files correctly. However the bottom outline is totally garbled!!.?? After much tearing of hair and gnashing of teeth, I found that a proper bottom etch file was only generated if all the top layer options are unticked leaving just bottom layer outline set.? So the workaround is to generate all top layer files first, then run a separate pass for just the bottom etch file.

I've no idea if this problem is unique to my setup or if it is caused by some "feature" of the latest Eagle revision.?