I started the dust collection for the router table today. I fabricated this piece of ductwork from some 4" metal duct I had lying around.
Here it is installed and a view from inside where the router goes.
This is where it exits on the back of the mobile tablesaw base.
I then proceeded to fabricate the 4" blast gate, installed another 6" bastgate to the base of the saw and fabricated a wye connection to hook it up to the 6" ductwork.
I fasten the metal ductwork to the wooden parts using my 18 ga. nail gun and 5/8" nails.
Here is how I'm connecting the router fence and someday will do double duty for an over arm saw dust collection.
I installed a 1/4" piece of plywwod that I space 1-3/4" from the back and left a 1-1/2" high opening at the bottom. With a equal size opening where the door would go it sucked up every bit of sawdust where the cabinet is when I turned on the dust collector.
Now I need to figure out how I want to do the on/off switch and the speed control.