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hi, this is my first time on the forum so i would like to say thanks for the resource and that i'm deferring to your expertise.
Im trying to make a board that will mount into a precisely 3d printed part and I want to align the components very precisely. however the devices / components i made/altered are designed in millimeters ( does eagle use lowercase mm in ulp / scr?). i've changed the default grid of a board to .5 mm in the eagle.scr file. however when i create the board from a schematic the parts are still placed, by their origins, on a 50 mil grid.
how does eagle figure out where to place devices when it auto creates a board file? and how can one change the grid the devices are auto placed on to mm?
The initial placement of parts on the blank board is almost entirely irrelevant. It's certainly fairly arbitrary and they're all off in the negative coordinate space, which is illegal for real placement.
If you want to move them onto your grid, hold <CTRL> as you pick the part up for MOVE. That places it on grid when you drop it.
If you want to place components precisely, and you know the exact coordinates, just use the command line:
MOVE R1 (34.0 25.5);
(I think... not at a machine with Eagle right now to check)
