September 5, 20187 yr 1 hour ago, Dadio said: After reading this: http://billpentz.com/woodworking/cyclone/downdraft.cfm This article has a number of incorrect ideas. I think the large hole design that started this discussion will work pretty well.
September 5, 20187 yr Author 24 minutes ago, PeteM said: This article has a number of incorrect ideas. I think the large hole design that started this discussion will work pretty well. Well I thought so too, Pete, but Bill Pentz is the Pioneer and best regarded authority on Dust Collection, so I take his opinions seriously. I will add some side boards to mine and see if that helps to contain the dust long enough to fall through to holes. I can not seem to wrap my mind around the peg board having a 1" space around it being more efficient than larger holes. The smaller holes cut down the air flow in my opinion, it is like holding your hand over the end of the vac hose reduces the air flow. Herb
September 6, 20187 yr 8 hours ago, Dadio said: Well I thought so too, Pete, but Bill Pentz is the Pioneer and best regarded authority on Dust Collection, so I take his opinions seriously. I will add some side boards to mine and see if that helps to contain the dust long enough to fall through to holes. I can not seem to wrap my mind around the peg board having a 1" space around it being more efficient than larger holes. The smaller holes cut down the air flow in my opinion, it is like holding your hand over the end of the vac hose reduces the air flow. Herb Herb it depends on the size of the DC and the hose that is attached. Large holes and the air will seek the first opening. Smaller holes and the suction will be graduated thru out the device.
September 9, 20187 yr Author Popular Post I well today I completed the downdraft box and all my fear were for naught, I works great. I do have a rubber pad for it coming, but might not even need it. I am happy camper ,it works way better than I had imagined. I did put side boards on it and they makes a big difference. Herb
September 10, 20187 yr Herb: That is a very nice job on your downdraft box. I made one years ago 1/8" peg board. When the bottom of mine gets a build up I slide the peg board out one end and clean away. When I sand sometimes I'll cover some of the 1/8" hole with a piece of cardboard for more suction on the remaining not coved holes. Will enclose some pictures. I have an overhead dust collection hose installed in the rafters for more flexible hookup. Preston Edited September 10, 20187 yr by steamshovel forgot a word
September 10, 20187 yr Author 4 hours ago, steamshovel said: I have an overhead dust collection hose installed in the rafters for more flexible hookup. I was going to drop a hose down right over the workbench, but then couldn't figure out how to do it with the garage door opening over the bench. So I moved it to the other end of the shop and use the drum sander drop instead. Herb
September 12, 20187 yr Just got this in an E mail from Rockler. Posting it here as humor. I mean, what self respecting woodworker would pay $180 for this? Herb MIGHT have that much in his but, his is bigger and better.
September 12, 20187 yr Gene I know there are some that would rather buy than build but that is why I started woodworking and working in my shop so I won't have to buy. If an older guy don't stay busy the body goes haywire. But going back and forth to the mail box might be enough exercise for some.
September 12, 20187 yr Popular Post After looking at the other sanding drown drafts I see my is really uncomplete. Herb and Gene have shown me the way, a light has come on. I need a handle, that makes a whole lot of sense. Makes me feel better. Preston
September 12, 20187 yr I think the most effective dust capture involves the "other 5 faces of the cube": the base is a sort of "gimme" because dust naturally falls due to gravity. It's the other faces that are a challenge. Every additional face--or partial face--that you barrier, the better the containment. The picture is my first personal attempt (and the 50th design I've every done!), and someday I'll tweak it again. Clear plastic on four sides maintains visibility/light. I'd like to have the cheeks and top extend a bit more over the tool (about 2"). I have a fan (out of pic) on the left that blows sideways across the face of the shroud, and that is not good because good capture needs only one air motion: toward the suction. But this design is about 85% efficient. Control of dust occurs at the tool. Trying to do room or area air treatment means you have to process 20--30 times more air, and you're breathing all that stuff as it waits in line to be sucked out. Edited September 12, 20187 yr by PeteM graphic
September 12, 20187 yr Author 3 hours ago, Gene Howe said: Just got this in an E mail from Rockler. Posting it here as humor. I mean, what self respecting woodworker would pay $180 for this? Herb MIGHT have that much in his but, his is bigger and better. Gene those are the same size panels on the top only I made mine for 4 panels that size per the Rockler pdf plan. http://go.rockler.com/tech/25077-Down-Draft-Ezplan2.pdf Herb
September 13, 20187 yr On 9/9/2018 at 3:50 PM, Dadio said: I do have a rubber pad for it coming, but might not even need it. This works pretty good...https://www.harborfreight.com/solid-nonslip-drawer-liner-65565.html Plus you get a free flashlite, tape measure, screwdrivers or multi-meter. This works too...and only $1/roll https://www.dollartree.com/search/go?w=drawer liner No free stuff though. BTW...like the side boards. Nice addition.
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