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Machine Fabrication Polystyrne

Aug 19 2020nbsp018332I am machining polystyrene on a 3axis CNC milling machine if anyone could help me with some parameters like feed rpm and what tools should i use My material is expanded polystyrene 80mm thick i am thinking of using ball nose for curves and simple one flutes endmill cutter but as you know higher spindle speed might burn the form

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