Dust Collection Long

Re: Dust Collection Long

Jim Shaver, Oakville Ontario

>Hi Dave,

I spoke about at the last HFMS meeting.,..where were you??

:-)

You need a cyclone......

Take care,

Jim

Re: Dust Collection Long

Dave Keay

>Hi Jim,

I was missing in action as usual! I am not convinced the difference in price between the Oneida and Belfab is justified and no way I will build one after reading about your exploits!

Regards,

Dave

But Dave....

Jim Shaver, Oakville Ontario

>I know a place in Cambridge who will build you one!! Now I find out!!

Take care,

Jim

Re: But Dave....

dave in oakville

>JIm,

so tell me your thoughts on my original question and where is the place in Cambridge and maybe I will buy you a Molson "X"

Dave

X says It all!!

Jim Shaver, Oakville Ontario

>Hi Dave,

Come on over and I'll show you how it runs....

Konrad gave me the lead, 3D Sheet Metal, ask for Wayne, 519-624-7575 (no email, no internet web page, No CC either).

They have made me some custom parts for my cyclone and system in the last few weeks, they are great. DC is their speciality.....and they have a wood mill too!

Take care,

Jim

Re: X says It all!!

dave in oakville

>Jim,

when/where?

Dave

Re: Dust Collection Long

Steve Worcester

>Understand that if the DC is in another room and you are pulling x CFMs of air out of a room and moving xCFMs to another (where the DC is), the replacement air has to come from somewhere. This is usually not a big deal except when you have to heat or cool that room that is having 850 CFMs pulled out of it.

Use the largest solid pipe you can attach to it, (please use metal), minimize and elongate curves and use the minimum amount of flexible hose.

Steve Worcester

www.turningwood.com

Re: Dust Collection Long

Barry Irby

>I have been working on my DC system for less than a year and am certainly no expert but I have noticed a few things. My shop is small and in a basement garage. My DC is out side in a shed and was supposed to be a 1300CFM model. (I have not measured, but I am reasonably sure it does not pull 1300 cfm in normal use, the bag gets dirty and it has four inch branches) I have not noticed a significant heat loss out of the shop. I have noticed that it does a better job of keep fines from rising through the house than my homemade air cleaner. The air cleaner cleans whatever air happens to pass through it, but does not remove air form the room. If the shop is warm, air rises from there into the house, taking dust with it. The DC not only sends the dust outdoors, but "depressurizes" the shop, reducing the rise of air into the house. (I think)

I would be skeptical of a 75' run. You must "fly" the particles all the way. If they lose energy and settle out, you get a clog. I might be wrong, but it just seems unlikely to work to me. Also, that air must be replaced and some of it is likely to to flow from the DC back to the basement any way it can find, taking the fines with it, but leaving some along the way.

Re: Dust Collection Long

Fog Tanner

>I have a 2hp Onedia cyclone and a 75 foot run would be past what mine can handle. I think you would be better served with a dedicated unit, preferably a cyclone. The bag units just move the dust from one location in the room and despense it in another. The real fine dust that does the damage goes through the bags, back into the air and your lungs, and in your case house.

Of course you could add an exhaust which would help remove a portion of the airborne dust. And working in a basement I would look seriously at an Airstream to catch the particles that are going to be missed.

Dust Collection Long

Dennis J. Gooding

>Dave, I have a thought for your consideration. The long run from shop to DC presents a serious design trade-off with regard to pipe size if you take the simplest approach. Too small a pipe size will cause too much pressure loss and lead to inadequate air flow to service the dust source properly. Too large a pipe size will reduce the air velocity in the pipe to the point that chips will settle and clog the pipe. Unfortunately, if you have a minimal size DC, you may not be able to meet both requirements with any pipe size. One answer would be to install a simple chip separator in the shop, connected to the dust sources with short pipes of appropriate size to meet the above requirements and to connect the chip separator to the DC with much larger pipe so that there is little pressure loss. Several companies make a lid to fit standard garbage cans that has connections for for DC hose. Alternatively, you can make your own. BTW, I too recommend a cyclone at the DC. I built my own based on plans from Wood Magazine. Dennis

Re: Dust Collection Long

Dave Keay

>Guys, thanks for the feedback and it looks like it is not practical to run a 75' pipe from my garage to the lathe in my basement workshop.

Therefor, what would you use as a dedicated "dust" collector at the lathe would one of the larger Fein shop vac's do the job attached to a dust hood if not what would you suggest? Again, I would use a respirator when sanding but still concerned about captured the dangerous small particle dust that would circulate?