a Thien seperator plate

I don’t really understand the point of the plate, Looks like a good idea and as I have a similar collector I’d be interested.

Thanks

Normally these plates are used on cyclone seperators which are placed in the main branch b4 the blower…

But they can also be placed in the discharge to aide in separating the debris in the bag from the filter …

As the chips and dust are spun around the cylindrical chamber they fall out of the stream into the bag, and the slower air in the center can no longer entrain material as it goes up the larger diameter hole into the filter.

Or that’s the idea at a least!

-- Matt, Pine is fine, but Oak's no joke!

I am curious how this effects the suction on the system.

-- when I am not on Lumberjocks I am on @ http://thisoldworkshop.com where we allow free speech

Hey ‘Dude’...

I don’t really have any way to measure whether or not there’s a change to the air flow…. other than to stick my hand up to the pipe…

I fired it up last night to make some cuts on my miter saw and the air flow to my “hood” felt strong.

But since I just cleaned the filter thoroughly, that’s to be expected with or without the plate…

There’re several write ups on these plates out there…. here's one

-- Matt, Pine is fine, but Oak's no joke!

I did this same thing to my DC.

I waited too long to empty the bag and still got a bunch of stuff inside the filter. Further, just before I emptied the bag, I was doing raised panels on my router table that generated a lot of fluffy shavings that clumped inside the router table, and I stupidly sent those clumps into the DC.

I’m not very far along on my second bag so I can’t yet tell how much this helps.

But I still expect to need to clean the filter, probably each time I empty the bag. But maybe the airflow won’t drop off as much as it did between cleanings.

-- Greg D. -- the price of freedom is tolerance

I’m re-using the clear (~6 mil) poly bags that came with the DC….

I should mark a line at about half full with a sharpie as a reminder.

I’m not at all interested in cleaning the filter with every bag change…

I’ll build a trash can top hat pre-seperator b4 I go there.

-- Matt, Pine is fine, but Oak's no joke!

Huh. Haven’t seen it set up like that before… Interesting. I use a separate canister for my separator. So the point is to keep stuff out of the filter is it? Huh. Learn something new every day! Thanks for sharing!

-- Beer, Beer, Thank God for Beer. It's my way of keeping my mind fresh and clear...

Well….. that’s the idea… we’ll soon see whether or not it works.

-- Matt, Pine is fine, but Oak's no joke!

In a true cyclone, the walls are tapered into a cone with a dust outlet at the bottom.
Air enters the top of the cone and accelerates as it is forced into smaller and smaller circles as it moves down the cone.
At some point the dust and particles are separated from the air stream by centrifugal force and flung out to the cone wall while the lighter, clean air spins back up the center of the vortex to exit out the center of the top.
The Thein seperator mimics this action with a baffle and avoids the necessity of making a cone shape. The dirty air is spinning down and through the open slot side of the baffle and it depends on the closed part of the baffle to replace the cone function of letting the particles drop out of suspension before the lighter clean air goes back up the center.

In either system, the more pressure drop you create in the system, the cleaner the exit air. I don’t know if it’s possible in a Thein system, but in a cyclone with 16 to 20 inches of pressure drop it’s possible to capture smoke particles, below .1 microns. But it’s cheaper to capture smoke in a cartridge or bag filter with less pressure drop. The energy to create pressure increases as the cube of the pressure difference. In other words, to double the pressure will take 8 times the horsepower.

-- Michael :-{| Diapers and politicians both need to be changed often; and for the same reason.

I wish I had got involved with woodworking boards and learned more about DC systems a long time ago….

I had salvaged an industrial cyclone with a 3 HP 3 ph motor and always intended to set up a rotary phase invertor to run it. This unit was stuffed into the corner of my shed for years. But when I abandoned the phase invertor project (for fear I would burn my house down and then have the insurance co. deny my claim) I carted the entire rig off to the recycled metal bin at the town dump.

I wish I still had that cyclone and could plumb it to my current Grizzly DC….

Oh well…. live and learn.

-- Matt, Pine is fine, but Oak's no joke!