Thread: Cabinet Dust Extraction On a Hammer Slider

I am modifying my exhaust port at the moment, not actually the port but what happens after that. My thinking behind this work was I am sick and tired of having the vertical drop to the saw for the cabinet and wanted it gone and wanted the extraction hose off the floor. I have been looking at this problem for at least 12 months and actually started a thread on what others have done but there did not seem to be any alternatives that suited me. I looked at moving the exhaust port to the left opposite wall away from the sliding table putting it under the extension table to the right but it was always in the way and was going to restrict material handling or if left on the floor was going to be a trip hazard and a PIA to use the correct terminology.

I am fortunate that my workshop is a two story building with a steel frame and sheet flooring so I came up with the bright idea of ripping up part of the floor and running a duct to the nearest wall but it could only be a short run due to the construction detail of the steel joists and beams. The next problem was the off cuts these saws swallow and preventing them getting into the underfloor duct and also allowing an easy way to get them out. I also had the issue of 5" to 4" differences in pipe size and a blast gate needed to be in there somewhere.

I built a box with an entry from the saw and in the floor of the box is the exit and the wire screen prevents big bits going any further. The perspex lid is easily removed to get the long bits out but the blast gate still had me puzzled until yesterday. I have slotted the wall nearest the saw so that a sheet of plywood can be pushed in and covers the floor exit but that was going to be a pain to get to so I needed a remote control for the BG. I took a long piece of wood and fixed it to the end of the plywood slide, it exits under the machine just where the operator stands do he can push it back and forth with his foot, I haven't tried this bit yet but it sounds good!! Now I have a remote control blast gate, well I hope I have.

The original arrangement, I don't know what genius decided putting the exhaust port under a sliding table was a good idea.....

Original Arrangement.JPG

Any Vertical pipe restricts the movement of sheet goods and the table hits it...

Vertical Off Original Port.JPG


Showing the under floor duct arrangement. Those are steel section Lysaght channels and there are about 300 vertical up welds for the under floor for anyone who is interested all done with Arc standing on a ladder.

Under Floor Duct Rough In.jpg

So I built a box...

Box.jpg

The inside of the box showing plywood slider that acts as a blast gate and wire guard to prevent big stuff getting under the floor. Fletty reckons it needs Guinea Pigs in it.

Sliding Blast Gate Open.JPG

And then I built a remote control for the blast gate. It is actually a long bit of timber that runs under the saw and exits at both ends. I have not cut it yet until I decide how long it needs to be..

Showing control rod.JPG

The other end showing the connection to the plywood slider....

Control Rod Connection.JPG

And the under floor electrical I thought would be a good idea to clean things up...

Box in Place With Underfloor Electrical Connectiom.JPG

I finished it all and the floor went back down this arvo so onto the overhead DE required. I need to refine the hood I made a few years ago that allows the fence to be right up to the blade without losing the ability to collect the dust. Just after I made it I went into hospital for major surgery and have never gotten back to it as I promised another user here I would as he wanted to try it.