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How do you place your screws so that the shopbot doesn't hit them?
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For us, we lay out the parts with Cut2D, which although simplistic, is fine for most of our 2.5D parts. We model the entire material piece (~2'x4') usually in CAM, and then have the mill drill its own screw down holes by placing circles throughout the material, with a diameter larger than the screw head.
We screw it down liberally.
When we add a part to the layout to cut, we'll add more screw holes around (or within) the part to ensure good hold down. As long as we don't run a cut line through our hole, we are fine. We have also learned that the bit will cut a screw
