I use the dust collection from fwharris too, and recommend it highly.
http://www.ringneckblues.com
Using Designer 1.187, STL importer, Center line, conforming vectors, scanning probe/PE, and the ROCK chuck.
Eddie
Once you have a good "Vacuum Head", I feel you no longer need the downdraft.
As you know, when you have wide boards there is little or no way for external air to enter the cutting area. This is due to the rollers, and sandpaper belts being compressed against the board and restricting possible air-flow.
I took this theory and reversed my thinking on the old downdraft system and reasoned (and tested) sending the air that was vented via the muffler into the old DD piping. This gives me a good source of extra air into the cutting area as long as the cut motor is active. Thus, even on the widest board I'm blowing dry air into the cutting area without having to rig another air supply. The point is to keep as much air-flow as possible to keep the unit clear of dust & chips. You notice a great difference with the cleanliness of the unit, and very little clean-up time.
AskBud
AskBud Downloads =>> CLICK HERE
Lesson added 7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"
CW Vacuum Head Project =>> CLICK HERE
AskBud Home Page =>> CLICK HERE <<=PC lessons or CW lessons
More than 1250 AskBud patterns vvv-CLICK BELOW-vvv
http://store.carvewright.com/manufac...ufacturerid=29
Here are some plans for a system you can make yourself:
http://forum.carvewright.com/showthr...ht=Frederick_P
Frederick Potter
Editions by Frederick
http://www.editionsbyfrederick.com
Keep 98% of the dust out of your machine with this free dust collector:
http://forum.carvewright.com/showthr...e-final-answer
RingNeckBlues
My patterns on the Depot
DC-INSERT It Just Sucks!
Proven to out perform all others!
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All patterns and projects that I share on the CarveWright forum are for your personal carving purpose. They are not to be shared, sold or posted on any other web site without permission from RingNeckBlues Designs.
FW,
What I have found, is that my Exhaust Reversal helps on cut-outs by venting the cut dust upward and the Vacuum Head(s) draws it off the project.
Further, by not attempting a Downdraft, at the same time I use the vacuum, I maintain maximum draw (vacuum) with the vacuum head.
I know, if I had a much stronger Dust Collector (600 CFM or better), I could do your "dual" method, but I only have a small DC.
AskBud
AskBud Downloads =>> CLICK HERE
Lesson added 7/15/2012 Titles begin with "2D-3D Build a Pattern-Part-3"
CW Vacuum Head Project =>> CLICK HERE
AskBud Home Page =>> CLICK HERE <<=PC lessons or CW lessons
More than 1250 AskBud patterns vvv-CLICK BELOW-vvv
http://store.carvewright.com/manufac...ufacturerid=29
RingNeckBlues
My patterns on the Depot
DC-INSERT It Just Sucks!
Proven to out perform all others!
Buy CarveWright
Colorado FaceBook Users Group
All patterns and projects that I share on the CarveWright forum are for your personal carving purpose. They are not to be shared, sold or posted on any other web site without permission from RingNeckBlues Designs.
I built a down draft box out of 2X6's and a 3/4" plywood base. I attached the CW on to the top of this. I used a 4" line to the side of the base. I also added a second 2" line to the exhaust port of the motor and tied this into my dust collection system as well. this stops all that really fine dust escaping though the cloth bag originally provided. I get very little dust escaping and most everything remains clean while the system is running. I get some sawdust collecting on the shelf below the clear lexan cover but beyond this all is well. I use a Powermatic PM1300 as my collector.
Good Luck
Thomas