I've been working on this for some time: A cyclone separator lid that
approaches true cyclones in separation efficiency and is scrub-proof.

http://www.cgallery.com/jpthien/cy.htm

On Nov 24, 2:07 pm, wrote:
I've been working on this for some time: A cyclone separator lid that
approaches true cyclones in separation efficiency and is scrub-proof.

http://www.cgallery.com/jpthien/cy.htm

I tried to post a note on your forum software. It just went into la-la
land and would not accept it. So I'll post it here.

I read about the idea of expanding your design to 4" hose sizes,
implying use with a fullsize dust collector. I read about the
problems you were trying to solve - but all of these were manifested
with shop vac -2.5" size implementations. I do not think the
carrryover problem you solved exists with larger scale dust collector
solutions. The traditional trashcan solution for a fullsize dust
collector uses 4" hoses and a 30 gallon trash can, which is
considerably taller than the 10 gallon can you used. I have used a 30
gallon trashcan with a homemade lid and a 2 hp Jet dust collector for
years. I never experienced the carryover problem you mentioned. My
lid looked just like yours, except it has no baffle. I suspect it
works as well as it does because its so much deeper and a larger
diameter.

Bob

On Nov 25, 6:40 pm, Bob wrote:
I tried to post a note on your forum software. It just went into la-la
land and would not accept it. So I'll post it here.

Sorry about that. I'll test it some more.

I read about the idea of expanding your design to 4" hose sizes,
implying use with a fullsize dust collector. I read about the
problems you were trying to solve - but all of these were manifested
with shop vac -2.5" size implementations. I do not think the
carrryover problem you solved exists with larger scale dust collector
solutions. The traditional trashcan solution for a fullsize dust
collector uses 4" hoses and a 30 gallon trash can, which is
considerably taller than the 10 gallon can you used. I have used a 30
gallon trashcan with a homemade lid and a 2 hp Jet dust collector for
years. I never experienced the carryover problem you mentioned. My
lid looked just like yours, except it has no baffle. I suspect it
works as well as it does because its so much deeper and a larger
diameter.

Bob

Thanks Bob. Interesting observations. I have personally witnessed
horrific scrubbing in shops I've visited, even with the 30-gallon
cans. Many people I know only use the cans with their planers because
they can't keep anything smaller than very large chips in their cans.

But I will do testing w/ and w/o the baffle when I finish building my
larger model.

On Sun, 25 Nov 2007 17:23:21 -0800 (PST), wrote:


Thanks Bob. Interesting observations. I have personally witnessed
horrific scrubbing in shops I've visited, even with the 30-gallon
cans. Many people I know only use the cans with their planers because
they can't keep anything smaller than very large chips in their cans.

But I will do testing w/ and w/o the baffle when I finish building my
larger model.

I've been using a shop-made separator with my Harbor freight DC for years.. Just
a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90
degree elbow on the outer edge.. no baffle, etc..
Used with lathe and band saw and palm sanders, mostly..
I empty the drum every couple of months and check the DC bags once a year and
they've never collected enough to tell that they did...

All 4" fittings on the Can and tools, except a 2 1/2" nozzle on the lathe..


mac

Please remove splinters before emailing

mac davis wrote:

I've been using a shop-made separator with my Harbor freight DC for years.. Just
a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90
degree elbow on the outer edge.. no baffle, etc..

According to Bill Pentz, this type of design doesn't work with 800+ cfm.
The increased airflow just scours the drum.

Chris

On Mon, 26 Nov 2007 14:20:27 -0600, Chris Friesen wrote:

mac davis wrote:

I've been using a shop-made separator with my Harbor freight DC for years.. Just
a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90
degree elbow on the outer edge.. no baffle, etc..

According to Bill Pentz, this type of design doesn't work with 800+ cfm.
The increased airflow just scours the drum.

Chris

You're way over my head, Chris..
I just know it works and have no idea why.. lol


mac

Please remove splinters before emailing

On Nov 26, 1:00 pm, mac davis wrote:
On Sun, 25 Nov 2007 17:23:21 -0800 (PST), wrote:

I've been using a shop-made separator with my Harbor freight DC for years.. Just
a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90
degree elbow on the outer edge.. no baffle, etc..
Used with lathe and band saw and palm sanders, mostly..
I empty the drum every couple of months and check the DC bags once a year and
they've never collected enough to tell that they did...

All 4" fittings on the Can and tools, except a 2 1/2" nozzle on the lathe..

mac

Please remove splinters before emailing

Well if it works that's great. I'm not here to fix what works, just
provide a possible solution for people that may not be as happy with
their setup as you.

Sorry if I somehow offended anyone by posting.

On Mon, 26 Nov 2007 15:04:02 -0800 (PST), wrote:

On Nov 26, 1:00 pm, mac davis wrote:
On Sun, 25 Nov 2007 17:23:21 -0800 (PST), wrote:

I've been using a shop-made separator with my Harbor freight DC for years.. Just
a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90
degree elbow on the outer edge.. no baffle, etc..
Used with lathe and band saw and palm sanders, mostly..
I empty the drum every couple of months and check the DC bags once a year and
they've never collected enough to tell that they did...

All 4" fittings on the Can and tools, except a 2 1/2" nozzle on the lathe..

mac

Please remove splinters before emailing

Well if it works that's great. I'm not here to fix what works, just
provide a possible solution for people that may not be as happy with
their setup as you.

Sorry if I somehow offended anyone by posting.

Please don't take my posts wrong..
I understood that you were researching designs and wanted examples of what folks
used..
sorry..


mac

Please remove splinters before emailing

On Sun, 25 Nov 2007 16:40:42 -0800 (PST), Bob wrote:

On Nov 24, 2:07 pm, wrote:
I've been working on this for some time: A cyclone separator lid that
approaches true cyclones in separation efficiency and is scrub-proof.

http://www.cgallery.com/jpthien/cy.htm

I tried to post a note on your forum software. It just went into la-la
land and would not accept it. So I'll post it here.

I read about the idea of expanding your design to 4" hose sizes,
implying use with a fullsize dust collector. I read about the
problems you were trying to solve - but all of these were manifested
with shop vac -2.5" size implementations. I do not think the
carrryover problem you solved exists with larger scale dust collector
solutions. The traditional trashcan solution for a fullsize dust
collector uses 4" hoses and a 30 gallon trash can, which is
considerably taller than the 10 gallon can you used. I have used a 30
gallon trashcan with a homemade lid and a 2 hp Jet dust collector for
years. I never experienced the carryover problem you mentioned. My
lid looked just like yours, except it has no baffle. I suspect it
works as well as it does because its so much deeper and a larger
diameter.

Bob

Me too, Bob..
Just posted for another "vote" for the OP..


mac

Please remove splinters before emailing