and I didn't even get a couple of adirondack chairs built! It started out
as a simple, fun project. I salvaged 10 or so 4x8x8 redwood beams from a
remodel job last winter and finally decided it was time to make something
from them. Armed with some of drawings, I hit the shop Monday to start
resawing...
After trying to unsuccessfully maneuver those beams around, I decided it
was time to stop and clean up things a little......
One thing soon led to another, and by Friday the shop had undergone a
full restoration. It took two trips into the big city over two days and
spanned at least half a dozen tool stores. . Everything got cleaned, tuned
up, re-arranged, re-arranged again, organized and reorganized. All the
screws, nails, and errant hardware now resides in a couple of pick racks
from Harbor Freight. The new 718 now sports a Forrest Chopmaster and the
old Rockwell "Contractor's Special" now has had a complete tune up with a
Super Bar and sports a WWII. The band saw has a new 3tpi hook tooth, the
jointer has new knives as well as the planer. The mortising machine got all
the chisels sharpened. I also added 20ft. of 2.5" flex pipe to the dust
collector and picked up some shop vac attachments to clean the place up.
Start Saturday morning.... went out there first thing to rough out
all the pieces for the chairs. What a joy it is to work in a clean,
organized shop with tuned up tools and sharp blades all around! (It'll
probably will be the last time until next year!) I made all the templates,
cut all the parts and routed them in what seemed like record time. The
Forrest blades, so far, have been an absolute pleasure to use. That old
table saw has never cut things so smoothly. Cleaning up was almost fun
(did I say almost?) with the shop vac attachments for the DC too.
The one thing I was not looking forward too was sanding all those parts.
As much as I'd like a drum sander, it's just not in the cards (yet). So
today, I built a downdraft table. Just a 18"x30" box with a bottom that
slopes from near the top to the bottom where I cut a 4" hole to attach the
DC, and a piece of scrap pegboard for the top. Works really good, no dust
could be seen in the lights after sanding all 100 or so parts. One bad
thing though, it whistles annoyingly throught the holes in the pegboard .
Oh well, that's another day. Christmas vacation is over after tomorrow, and
I have some chairs to assemble! --dave
-snip-
> After trying to unsuccessfully maneuver those beams around, I decided
> it was time to stop and clean up things a little......
-snip-
> What a joy it is to work in a clean, organized shop with tuned up tools
> and sharp blades all around!
-snip-
Amen to that, brother! I finally got the shop set up and cleaned up after a
move. Took me three solid days of cleaning, sorting, sweeping, dragging,
tossing, digging and lugging. Still haven't really done tool tune-up,
though, at least not on the big floorstanding stuff. That being said, it
sure is nice to run boards through the saw without having to straddle a
lawnmower... :)
Thanks for the tip! BTW, I did overlay the downdraft top with a router mat
(well, shelf liner) and it kept things from sliding around, yet still
allowed the dust to flow down. When I find the time to fix the whistling,
she'll be a real gem. --dave
"David Merrill" <[email protected]> wrote in message
news:Kzcuf.666442$x96.570146@attbi_s72...
> Try chamfering, or better radiusing (abrasive in a split mandrel), the air
> inlet side of the pegboard holes to smooth the air flow to increase CFM
> while reducing peak air velocity though the holes. A sharp edged fluid
> entrance produces a 'vena contracta' which can greatly reduce the
> effective
> flow area of the hole. See, for example
> http://www.bsmagri.com/cgi-bin/dictionary/dictionary.cgi/vent/vena%20contracta/.
> This reference http://www.research.ibm.com/journal/rd/211/ibmrd2101I.pdf
> (figures 12 and 13) indicates that the minimum radius needed to restore
> full
> flow area is about 15 percent of the hole diameter. For example, radius =
> .038" for a .25" diameter hole.
>
> I have noticed in Lowe's small panel area some 2' x 4', molded white
> plastic
> pegboard panels with nicely radiused holes for about $12/each and thought
> that, airflow-wise, they might make a dandy top for a downdraft sanding
> table. Unfortunately, the plastic is rather slippery, but perhaps this
> could be compensated by overlaying with rubber mesh shelf liner material.
>
> David Merrill
>
> "Dave Jackson" <[email protected]> wrote in message
> news:IZ%[email protected]...
>> snip... So
>> today, I built a downdraft table. Just a 18"x30" box with a bottom that
>> slopes from near the top to the bottom where I cut a 4" hole to attach
>> the
>> DC, and a piece of scrap pegboard for the top. Works really good, no
>> dust
>> could be seen in the lights after sanding all 100 or so parts. One bad
>> thing though, it whistles annoyingly throught the holes in the pegboard
>> .
>> Oh well, that's another day.
>>
>
>
Try chamfering, or better radiusing (abrasive in a split mandrel), the air
inlet side of the pegboard holes to smooth the air flow to increase CFM
while reducing peak air velocity though the holes. A sharp edged fluid
entrance produces a 'vena contracta' which can greatly reduce the effective
flow area of the hole. See, for example
http://www.bsmagri.com/cgi-bin/dictionary/dictionary.cgi/vent/vena%20contracta/.
This reference http://www.research.ibm.com/journal/rd/211/ibmrd2101I.pdf
(figures 12 and 13) indicates that the minimum radius needed to restore full
flow area is about 15 percent of the hole diameter. For example, radius =
.038" for a .25" diameter hole.
I have noticed in Lowe's small panel area some 2' x 4', molded white plastic
pegboard panels with nicely radiused holes for about $12/each and thought
that, airflow-wise, they might make a dandy top for a downdraft sanding
table. Unfortunately, the plastic is rather slippery, but perhaps this
could be compensated by overlaying with rubber mesh shelf liner material.
David Merrill
"Dave Jackson" <[email protected]> wrote in message
news:IZ%[email protected]...
> snip... So
> today, I built a downdraft table. Just a 18"x30" box with a bottom that
> slopes from near the top to the bottom where I cut a 4" hole to attach the
> DC, and a piece of scrap pegboard for the top. Works really good, no dust
> could be seen in the lights after sanding all 100 or so parts. One bad
> thing though, it whistles annoyingly throught the holes in the pegboard .
> Oh well, that's another day.
>
"Dave Jackson" wrote in message
> could be seen in the lights after sanding all 100 or so parts. One bad
> thing though, it whistles annoyingly throught the holes in the pegboard .
> Oh well, that's another day.
Your obvious task for next time is to resize those holes so it whistles
"Dixie". ;)
Good story ...
--
www.e-woodshop.net
Last update: 12/13/05
On Mon, 02 Jan 2006 02:11:52 GMT, "Dave Jackson" <[email protected]>
wrote:
>and I didn't even get a couple of adirondack chairs built! It started out
>as a simple, fun project. I salvaged 10 or so 4x8x8 redwood beams from a
>remodel job last winter and finally decided it was time to make something
>from them. Armed with some of drawings, I hit the shop Monday to start
>resawing...
> After trying to unsuccessfully maneuver those beams around, I decided it
>was time to stop and clean up things a little......
> One thing soon led to another, and by Friday the shop had undergone a
>full restoration. It took two trips into the big city over two days and
>spanned at least half a dozen tool stores. . Everything got cleaned, tuned
>up, re-arranged, re-arranged again, organized and reorganized. All the
>screws, nails, and errant hardware now resides in a couple of pick racks
>from Harbor Freight. The new 718 now sports a Forrest Chopmaster and the
>old Rockwell "Contractor's Special" now has had a complete tune up with a
>Super Bar and sports a WWII. The band saw has a new 3tpi hook tooth, the
>jointer has new knives as well as the planer. The mortising machine got all
>the chisels sharpened. I also added 20ft. of 2.5" flex pipe to the dust
>collector and picked up some shop vac attachments to clean the place up.
> Start Saturday morning.... went out there first thing to rough out
>all the pieces for the chairs. What a joy it is to work in a clean,
>organized shop with tuned up tools and sharp blades all around! (It'll
>probably will be the last time until next year!) I made all the templates,
>cut all the parts and routed them in what seemed like record time. The
>Forrest blades, so far, have been an absolute pleasure to use. That old
>table saw has never cut things so smoothly. Cleaning up was almost fun
>(did I say almost?) with the shop vac attachments for the DC too.
> The one thing I was not looking forward too was sanding all those parts.
>As much as I'd like a drum sander, it's just not in the cards (yet). So
>today, I built a downdraft table. Just a 18"x30" box with a bottom that
>slopes from near the top to the bottom where I cut a 4" hole to attach the
>DC, and a piece of scrap pegboard for the top. Works really good, no dust
>could be seen in the lights after sanding all 100 or so parts. One bad
>thing though, it whistles annoyingly throught the holes in the pegboard .
>Oh well, that's another day. Christmas vacation is over after tomorrow, and
>I have some chairs to assemble! --dave
>
Great post!
Congratulations!
Tom Watson
http://home.comcast.net/~tjwatson1/