willyinaus wrote:I used plywood a lot and keep it between two 18mm MDF Boards with about 200kg rolled onto via a 44gallon drum full of water kept it straight for my CNC Router 6,9,12mm it also helps if you keep it in a warm place as well sandwiched like above in QLD Australia that isn't a problem for me but if I just leave it lying on the floor flat it bows in a matter of days.
Can I ask what thickness you are cutting with your CO2 Lasers and watts,passes etc.
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