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post #1 of 18 (permalink) Old 04-12-2009, 09:58 PM Thread Starter
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Default Dust Collection Question

Hi folks. I'm a hobbiest and newcomer to the forum. This is my first post.

I recently finished building my first router table - a melamine variation on the NYW design - and I'm surprised by what I've encountered in my dust collection set up. I spent a lot of time trying to figure out how to best configure the cabinet cavity underneath the router to channel dust into the 4" dust collection port at the back of the case. (My dust collector is a ClearVue cyclone.) I didn't pay as much attention to dust collection at the table level - I just hooked up another 4" hose to a plastic blast gate attached to the fence.

What surprises me is that I really don't seem to get much dust in the cabinet cavity because the fence hose seems to grab almost everything. (I've only used the table for edge routing so far.) Somehow I figured that I needed a big space surrounding the router because of the volume of chips and dust that would be flowing down there. If I had known that dust collection down there didn't require a big space, I probably would have made a much smaller cavity and used the savings for another drawer or something.

Am I missing something? Is a lot of space needed around the router to generate air flow to keep the router cool? Or is there some other reason for not making the cavity as tight as possible without restricting access to the router? Or is that, in fact, what people who know what they're doing do, and I just screwed up?

Thanks
Chris
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post #2 of 18 (permalink) Old 04-12-2009, 10:33 PM
 
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Hello Chris,
When I built a enclosed cabinet for my router, which is a Porter Cable 3 1/2 hp router, I placed a 4 inch hose outlet going to my cyclone collector. Once I added an adjustable vent on the side of the cabinet my dust collection improved greatly. You need more air entering the enclosure than what you get from the opening around your router bit. A cyclone will pull a lot of air through a 4 inch hose and it needs enough air flowing in to keep the router from overheating in addition to enough air coming in to match what goes out with the chips. Mismatched airflow will affect dust collection pressure.
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post #3 of 18 (permalink) Old 04-13-2009, 06:17 AM
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Hello Chris;
To answer your question, only enough room to make the router accessible is needed.
The amount of dust going to the cavity depends on what you are doing. If you are routing dados, the dust will go down, but also out the end of the dado. And, like you found out, much of it will go out the fence port.

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post #4 of 18 (permalink) Old 04-13-2009, 11:50 AM
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Quote:
Originally Posted by Tigerpaw View Post
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Somehow I figured that I needed a big space surrounding the router because of the volume of chips and dust that would be flowing down there. If I had known that dust collection down there didn't require a big space, I probably would have made a much smaller cavity and used the savings for another drawer or something.

Thanks
Chris
Spent a lot of time last weekend on my table too and same thing. My router "cavity" is about 25" wide and 26" north to south and maybe 25" deep IIRC. The table is a big honker at roughly 28" deep by 47" wide and now a big waste of space IMO inside that cavity. I'm thinking I try to slide in some shallow drawers for meauring tools or??? Just seems to be a huge dead space that I sure didn't need to incorporate into the design.
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post #5 of 18 (permalink) Old 04-13-2009, 12:15 PM
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Collecting dust from the top and bottom is the way to go. I think the space on the OP table for the router is all you need and probably a perfect size.
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post #6 of 18 (permalink) Old 04-13-2009, 03:31 PM
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Welcome to the RouterForums Chris.




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post #7 of 18 (permalink) Old 04-13-2009, 04:03 PM
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I'll edit mine when I can figure out how to. lol
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post #8 of 18 (permalink) Old 04-13-2009, 08:05 PM
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Greetings Chris and welcome to the forum glad you could make it.

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post #9 of 18 (permalink) Old 04-16-2009, 04:27 AM
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Interesting subject.
Since my Rockler was missing the Dust Collector I wasn't even going to add one.
I do have a suggestion which may or may not apply.
Could you save space by just adding a Woman Stocking ?

Using my Ridgit TS2400 Table Saw for an example, I could never find a 2 1/2" collect for it to mount my Wet/Dry Vac I decided to just hang a Woman Silk Stocking - to my surprise it is ample and allows air flow.

Just an idea.
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post #10 of 18 (permalink) Old 04-16-2009, 01:02 PM
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Quote:
Originally Posted by Rooky View Post
Spent a lot of time last weekend on my table too and same thing. My router "cavity" is about 25" wide and 26" north to south and maybe 25" deep IIRC. The table is a big honker at roughly 28" deep by 47" wide and now a big waste of space IMO inside that cavity. I'm thinking I try to slide in some shallow drawers for meauring tools or??? Just seems to be a huge dead space that I sure didn't need to incorporate into the design.
That is a lot of dead space. Mine is 14" D x 14" H x 10" W.. I sized it close to a volume that allows easy installtion of the motor into the base and that's it. Attached is a pic of the router space with a dirty plexiglass door.

Here's an idea, why not attach a couple of cleats to the sides, one on the back, install a shelf, and use most of that router cavity for bit storage or other.

I think I'll have to deal with air handling when I get the shop vac back in the shop. I have read that some type of inlet should be provided for dust collection from the router cavity, to work effectively. I do have a 1 1/4" hole cut in the side of the cavity for the router wire to reach the adjacent outlet. I don't know if that will be enough "make-up" air. We will see. Even with the small cavity, my router doesn't get hot so that shouldn't be a concern.

Post up some pics when you have reached the "admiration" stage of your table build. It's cool to see what others have incorporated in their table.
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