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Pull Out Dust Bin For My Separator

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Project by DaveTPilot posted 03-07-2013 02:06 AM 1462 views 2 times favorited 8 comments Add to Favorites Watch

I finally added a pull-out bin for my Dust Collector Bin. One thing that I noticed is, although this system works VERY well, the dust and chips collected in the front left corner of the bin as seen in the 3rd picture. This was true even before I added the pull-out bin. The problem with that is, the window would show that the bin was full when in fact it was only about 1/3 full.

I added a “fence” in an attempt to break the swirling action that drove the debris to the front left corner. I would love to tell you that I used my vast knowledge and understanding of physics and mechanics, (said with tongue in cheek), but the truth is…the first thing I tried…worked, by shear luck. Sometimes it is better to be lucky than good!

The last photo shows how the chips spread around evenly in the pull-out bin.

A few people have asked if this system still works well and would I do it again or go another route. I can say without any apprehension that I would absolutely use this solution again. It was so easy and quick to build and far exceeds any expectations that I had.

When I designed it, I expected it to work and that it would increase the efficiency of the separator by keeping the trash can empty thereby allowing it to perform like a poor man’s cyclone. I never expected it to collect 98% of everything I throw at it! I am still amazed whenever I empty the bin to see the amount of fine, talcum-like dust that never makes it to the collector bags.

Thanks for looking.

Note: In case you are wondering what the white debris is in the bin…it is pvc shavings from cutting pipes for the DC system.

UPDATE: The “fence” in the bin didn’t work all that well after all. It worked well for a small amount of debris then everything started collecting in the corner. I just removed it.

-- How valuable is time to a person who spends his disparaging the beliefs of others? --David Berthelette www.pilotwoodworks.com





8 comments so far

View woodbutcherbynight's profile

woodbutcherbynight

1311 posts in 1164 days


#1 posted 03-07-2013 02:31 AM

Good idea and nice work solving the issue with physics for the rest of us. Next we need the answer to the great question of life, the universe, everything ya know? (laughing)

I added a drawer like yours under my contractors saw for the same reason, easy to clean up and less mess.

-- Live to tell the stories, they sound better that way.

View robscastle's profile

robscastle

1881 posts in 959 days


#2 posted 03-07-2013 02:40 AM

Good job Dave,
I build something similar and used the same amount of physics and maths and hey presto I believe I get about 95% collection of waste.
There is a blog on it within LJs
I dont have a collection tray as such,... just two bins.
I might have to “look into” doing it too!

-- Regards Robert

View RogerInColorado's profile

RogerInColorado

310 posts in 709 days


#3 posted 03-07-2013 04:41 AM

I’m curious about how deep your box is. This is really a great idea and I’m thinking that a box that is only a foot and a half deep or so would collect about half of what a 30 gallon can would which means emptying it more frequently but would also fit nicely under my blower and save a couple square feet of space and shorten that duct run. I love to see thinking outside the box.

View Ken90712's profile

Ken90712

15337 posts in 1943 days


#4 posted 03-07-2013 09:08 AM

Great job and congrats on the fix!

-- Ken, "Everyday above ground is a good day!"

View DaveTPilot's profile

DaveTPilot

271 posts in 2053 days


#5 posted 03-07-2013 12:50 PM

Thanks for the comments, guys.

@Roger—Using an online calculator, (because I’m still on my first cup of coffee this morning and the mathematics portion of my brain is still catching some zzzz’s :) I have compared the stats:

The Pull-out bin I built is 18.5”x16.75”x10” The width and length of the original bin (pre Pull-out) were simply to accommodate the bottom diameter of the trash can. The depth was arbitrary. I believe it was determined by the width of the MDF I had leftover from something else. When I first built this, it was simply a proof of concept exercise. When it worked so well, I felt no need to build another of larger depth.

So, 18.5”x16.75”x10” = 3098.75 cubic inches or 1.8 cubic feet which is the equivalent in liquid measure to approximately 13 Gallons.

So, to answer your question…yes and no. The bin clearly would hold less debris than the trash can if you were to fill both to the top. However, the trash can separator, without a collection bin, starts to become quite inefficient very quickly. With the can less than half full, my DC bags were collecting the majority of the debris…even the larger chips from my jointer.

Realistically, I needed to empty the can by the time it was 1/3 full to maintain any level of efficiency. Using that logic, the can alone was only effectively capable of holding about 10 gallons or about 2500 cubic inches (1.45 cubic feet). So when you look at the effective volume of each container, the bin holds more.

Now, this is mostly theoretical in that I am using my experience and observations regarding the efficiency of the can separator without the bin vs. with the bin. But I will say that the can alone only collected a tiny amount of fine dust. A large majority went into the bags even when the can was empty.

So, in practice, I empty the bin less frequently than I emptied the can without the bin. Also, and much more importantly, I never need to empty my DC bags!

One more bonus is, now that I have the pull-out bin, emptying the debris is a snap. ;-)

-- How valuable is time to a person who spends his disparaging the beliefs of others? --David Berthelette www.pilotwoodworks.com

View woodbutcherbynight's profile

woodbutcherbynight

1311 posts in 1164 days


#6 posted 03-08-2013 12:36 AM

I think the math worked out great but it is HIGHLY unlikely with or without coffee I would have taken the time to do the math. (Laughing) I would have said, hey it works, great. (laughing)

-- Live to tell the stories, they sound better that way.

View DaveTPilot's profile

DaveTPilot

271 posts in 2053 days


#7 posted 03-08-2013 12:41 AM

Dang it! I could have saved like 20 minutes this morning using your answer. LOL :-)

-- How valuable is time to a person who spends his disparaging the beliefs of others? --David Berthelette www.pilotwoodworks.com

View woodbutcherbynight's profile

woodbutcherbynight

1311 posts in 1164 days


#8 posted 03-08-2013 04:20 AM

AND had time for some more coffee…. (laughing)

-- Live to tell the stories, they sound better that way.

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