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How far to the edge of a 4x8 can the Maslow cut? I see a lot of wasted plywood.
Welcome to the Forum.
Theoretical, to the edge, however you might get increasing accuracy issues the closer you get to the bottom left and right edge and the top middle one. To cut till the edge a thin ‘frame’ of same thickness as your stock is needed so the sled does not tilt once at the edge.
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Here is an example of a frame providing a contour.
In this case, the contour is 1/4 thicker than the spoil board.
So 1/4" thick material gets a flush surface for the sled all around up to the edge.
Thicker material would need some different setup.
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This is exactly what I was thinking. As long as the frame is a minimum half the width of the router support base you should be able to use most if not all the 4 X 8 sheet.
If you have the chains at the balance point on the sled (and they are parallel
to the workpiece) you can cut within a half inch of the sides, all the way to
the top, but without support below the workpiece you cn only get down to ~6"
from the bottom of the workpiece
David Lang