Insert modification for better table DC - Page 2 - Router Forums
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post #11 of 28 (permalink) Old 03-12-2020, 10:33 AM
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@sunnybob
I like that ,Bob, that is the way my router DC is set up too. I don't have any additional hole drilled in the plate, i just use an oversized hole in the plate that I use for Dadoes etc, or no ZC plate at all.
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post #12 of 28 (permalink) Old 03-12-2020, 11:32 AM
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I've kind of swamped the original post. Sorry about that.
What youve done is good. Knowing what I know now, if I still had the kreg plate i would do the same.
Just be prepared for the dust to blow upwards, instead of downwards.
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post #13 of 28 (permalink) Old 04-09-2020, 07:33 PM
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Bill, your experiment has me curious to learn how things work out for you after you have your box in place.

In the last 6 months I have built two different dust collection boxes. The first one was just a prototype to allow me to see just how much saw dust I could collect using downdraft collection along. The second one was the permanent one where I heeded the advise of Stick and others to make sure the motor had good clean air to breath. In both cases, I was and am absolutely thrilled with how much sawdust gets captured when dadoing and edge routing. I am never routing again without it.

When dadoing, I experience a slight burst of dust right when the cut is started, but once the bit is about 2x the diameter into the cut virtually nothing comes out on the table. It is all be sucked back through the dado slot and down into the box and out the dust collection port.

When edge routing, using my particular custom router fence (which has no dust port BTW), the dust from the edge route is sucked down through the insert plate as well. I attribute this to the 45mm cave behind the bit that traps, breathes and allows the dust to be sucked downward. Works so well, I do not see myself modifying its design to add the more traditional above table dust collection.

The added downdraft afforded by the extra holes in your plate may be all that is needed to improve upon what I perceive to be the weakest performing dust collection scenario - freehand edge routing (i.e. edge routing without the fence).

BTW, I am using the 7518 router, same as you.


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post #14 of 28 (permalink) Old 04-09-2020, 08:05 PM
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Quote:
Originally Posted by mbrun View Post

When edge routing, using my particular custom router fence (which has no dust port BTW), the dust from the edge route is sucked down through the insert plate as well. I attribute this to the 45mm cave behind the bit that traps, breathes and allows the dust to be sucked downward. Works so well, I do not see myself modifying its design to add the more traditional above table dust collection.

The added downdraft afforded by the extra holes in your plate may be all that is needed to improve upon what I perceive to be the weakest performing dust collection scenario - freehand edge routing (i.e. edge routing without the fence).
to add above table at the fence DC is a major plus... SERIOUSLY MAJOR!!! VOE...
see the PDF to make an above table pickup...
a PVC build is illustrated...
a sheet metal HVAC wye fitting is a lot easier easier to work w/ and more adaptable...

.
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File Type: pdf PVC DC hood.pdf (138.0 KB, 11 views)

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If only new layers hadn't been added....

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post #15 of 28 (permalink) Old 04-09-2020, 08:12 PM
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Stick, you have got me wondering about adapting that PVC Trap for use in a standard-alone contraption that could be used for free-hand routing. Hmmmm?


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post #16 of 28 (permalink) Old 04-09-2020, 08:12 PM
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Stick also suggested adding a "snorkle" tube that is attached to the air intake (top) of the router and that pulls clean air in. This would mean cutting a hole through the dust collection box in my case, and being fussy, I'd want that snorkel to draw air from a filtered chamber, a box with a gille on the bottom and sized to fit a paper filter or two. That cleaned air will probably clear the insert holes by blowing on them so the sawdust will fall into the DC box, not the motor. Is that pretty much what you did?

The more I do, the less I accomplish.
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post #17 of 28 (permalink) Old 04-09-2020, 08:15 PM
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Quote:
Originally Posted by mbrun View Post
Stick, you have got me wondering about adapting that PVC Trap for use in a standard-alone contraption that could be used for free-hand routing. Hmmmm?
free hand as in not using an RT???...

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post #18 of 28 (permalink) Old 04-09-2020, 08:26 PM
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Quote:
Originally Posted by mbrun View Post
Stick, you have got me wondering about adapting that PVC Trap for use in a standard-alone contraption that could be used for free-hand routing. Hmmmm?


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Cut away a section that hangs over the edge. Make an oversized plate to mount both the router and the trap, connect a hose to one end and cap the other end.

Or check to see if the router brand has a DC boot that fits inside the router. I know there area a few brands that have this attachment.

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post #19 of 28 (permalink) Old 04-09-2020, 08:30 PM
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Default Insert modification for better table DC

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free hand as in not using an RT???...

Version 2 Freehand. Freehand as in routing an irregular shape using a bearing bit or template on the table but without a fence.


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Last edited by mbrun; 04-09-2020 at 08:33 PM.
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post #20 of 28 (permalink) Old 04-09-2020, 08:45 PM
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Default Insert modification for better table DC

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Stick also suggested adding a "snorkle" tube that is attached to the air intake (top) of the router and that pulls clean air in. This would mean cutting a hole through the dust collection box in my case, and being fussy, I'd want that snorkel to draw air from a filtered chamber, a box with a gille on the bottom and sized to fit a paper filter or two. That cleaned air will probably clear the insert holes by blowing on them so the sawdust will fall into the DC box, not the motor. Is that pretty much what you did?

No snorkel tube, but effectively the same result. In my case, clean fresh air is drawn into lower motor chamber, it flows up through and around the motor into an upper chamber where it gets mixed with sawdust and air being drawn into and through the upper chamber and then exhausted to the dust collector.

Here is a front view of box with vented door open (after about 10 minutes of routing BTW).



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Last edited by mbrun; 04-09-2020 at 08:50 PM.
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