![]() ![]() I would experiment with plugging some of the worst openings with what I've suggested in mind to see if you improve dust extraction. Plugging some of the major openings (like those in your pictures) may help increase the flow at the blade, but the DC static pressure will increase due to more restricted flow. You can drill a finger hole to the left of the blade in the ZCI to help draw dust into the cabinet. If you use Zero Clearance Inserts (ZCI) for your saw blades and dado blades, much of the sawdust stays above the table, so an overhead pickup guard is the best solution. Ideally, you want air to enter the saw around the blade to carry sawdust down into the cabinet and to eliminate "bypass" air that just goes directly to the exhaust port without picking up any dust. As an example, stick some gum to seal around a straw in a lidded drink cup and try to suck through the straw - you'll find you can't (and the cup with cave in)! Before you get too carried away trying to stop up all of the gaps in your saw, remember that for every cubic foot of air that is pulled into the duct through the port connected to your saw, a cubic foot of make-up air must enter the space you are exhausting. ![]()
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