One reason for owning a Cabinet Saw is the efficient collection of saw dust generated by the tool. After using the saw for a few months I noted that while most of the sawdust generated was evacuated by my dust collection system, the floor behind the saw was always loaded with sawdust. I wanted to solve this issue.
On examination sawdust was being blown over the rear of the saw chassis and the surrounding cabinet. A temporary cover over the space on top of the back of the saw resulted in a buildup of sawdust on the rear trunion bracket and surrounding assemblies. The right solution was to collect the sawdust as it came out of the saw.
I fashioned a box (plenum) the width of the saw cabinet to fit under the rear fence rail. The box is open to the opening over the rear of the saw cabinet..A magnet glued to each end helps to hold the box tightly to the cabinet.
To extract the sawdust a 2 inch dust hose is fitted to the bottom of the new plenum. It connects to the 4 inch dust hose directly below the plenum attached to the rear of the saw cabinet. A Rockler “Dust Right” Router Table Dual Port dust fitting provides the junction in the 4 inch dust hose.
The “Dust Right” attaches directly to the dust port on the saw: the 4” hose to the “Dust Right”
The long closed side of the box is fashioned from 5/4 wood. This allows two bolts to secure the box to the rear fence rail..One of the bolts secures both the added plenum and the out feed table for the saw as well.
The result of adding this small plenum to the rear of the saw is the elimination of 99% of sawdust collecting behind the saw.
-- Bill, Michigan "People don't come preassebled, but are glued together by life"