Subject: Vacuum problems.. Physics lesson???

From: Bill Kapinski <[email-masked]>
Date: Mon, 10 Feb 1997 21:09:08 -0500

I am new to woodworking and am having some problems with saw dust
removal. I have a mitre saw and a belt sander with dust ports and bags. 
If I use the bags I collect about 30% of the sawdust generated. Thinking
if I hooked up my shopvac to the ports I'd get most of the dust...
Wrong!!! It seems that when I power up the shopvac I get less than if I
use just the bags. 

I'm confused...

Lately I've hooked up the vac but only turn it on occasionaly, letting
the sawdust blow into the hose for a while before I turn on the vac.

Any thoughts on this subject will be appreciated.

Bill K.

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From: Termite <[email-masked]>
Date: Mon, 10 Feb 1997 23:11:50 -0500

Bill,
Seems like when I first tried using a shop vac. for big clean ups and
connecting to tools I saw the same thing. The only conclusion that I
came to was that the fliter system in the shop vacs just don't go that
good a job at traping VERY FINE DUST. If you watch the exhaust port on
your vac I'm sure you'll see the dust being blown right back into the
air. This makes the situation even worse than it you didn't use the vac.
 
Oh well......

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From: [email-masked] (Trevor Galvin)
Date: Tue, 11 Feb 1997 09:22:48 GMT

Shop vacs get clogged up with dust real quick and stop sucking. They
make a "dust collector" for woodworkers that is designed for the job.
You might want tolook for someone who is upgrading their system and
wants to sell their unit reasonably (like myself). I have the basic
1hp double bag unit and would like to upgrade to 2hp. For the
woodworker they are the only way to go.

Trevor