Good sunny afternoon fellow creekers. As I finish the repairs on this laser I have been cleaning it. The lack of air flow and lack of cleaning inside the machine, its a wonder they never had a fire. My question of the day is this. I know the machine has and warrants the need for a 6" exhaust duct. However, the way this machine is designed is that the 6" exhaust duct connects to a 2nd 6" opening that is designed in theory to remove dust, particles and smoke off the laser bed. I say in theory because the plenum goes from 6" round to 43 each 1 1/4" x 1/4" slots. The area is not even close. The slots come up to 13 square inches and that is generous since all the slots are rounded top and bottom. Six inch round ducting is around 28.3 square inches.
The real question is do any of you still have this plenum installed? Its tack welded on, not even removable. A real fire hazard if you ask me. I am leaning towards yanking it at a minimum.
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