DC system noise

Signed-In Members Don't See This Ad
lorbay

lorbay

Member
Joined
Jul 2, 2009
Messages
3,391
Location
BC. Canada
So I finally got my DC system all piped in with the DC being in a seporate room. I vented the DC outside with a vented louver which closes when the DC is off.
I did all of this to get the noise away from the shop and not have to wear ear protection but there is nearly as much noise coming back through the piping, with the loudest one being at the lathe as I have a large dusthood there.
Has anyone else had this problem or have any ideas what I can do to get the noise down???:confused::confused:

Lin.
 
Signed-In Members Don't See This Ad
If it's the extreme "whooshing" wind noise your talking about then I would think that about the only thing to be done is to literally make the surfaces of your air scoops and hoods more "aerodynamic" so to speak. Smooth them out, no sharp edge transitions, no screw heads sticking up, etc......

If it's actuall mechanical noise from the blower coming back thru the ducting then I'm not sure....... some sort of a series of baffles inline between the blower and the outlets?

These are just almost random semi-educated guestimates. Hopefully someone more in the know will chime in:)
 
MatthewZS said:
If it's the extreme "whooshing" wind noise your talking about then I would think that about the only thing to be done is to literally make the surfaces of your air scoops and hoods more "aerodynamic" so to speak. Smooth them out, no sharp edge transitions, no screw heads sticking up, etc......

If it's actuall mechanical noise from the blower coming back thru the ducting then I'm not sure....... some sort of a series of baffles inline between the blower and the outlets?

These are just almost random semi-educated guestimates. Hopefully someone more in the know will chime in:)
Click to expand...
Yes it is the drone from the impella.

Lin.
 
You did all you can do by with moving the collector to an out building. Dust collectors make noise, that's all there is to it!
I have an Oneida system and it's powerful!! One thing I have found is that I don't need to have the blast gates all the way open. If you close the gate about half way it will reduce the noise quite a bit.:wink:
 
I also put a DC in my garage and its very loud. It got quiet when the bag slipped off the bottom and I didn't notice. I noticed that most of the noise is comming after the impeller like Lin said but closing all the gates except for one at each branch helps a lot. I don't know about your lathe hood but if your standing right in front of it your going to hear it. I just have a 4 inch flex pipe proped up behind my lathe with paint cans. Works okay but not squeeky clean.
 
I have the same setup you have and mine is very loud at the lathe. Sounds like a jet plane taking off. I was thinking of going to 6" pipes rather than the 4" I currently have to see it that would help.
 
manatee said:
I have the same setup you have and mine is very loud at the lathe. Sounds like a jet plane taking off. I was thinking of going to 6" pipes rather than the 4" I currently have to see it that would help.
Click to expand...

I did run 6" pipe end to end then 4" flex hose from the blast gate to the machine, i was also going to put one of the Phil Thien seporators just before the DC unit. As mentioned in this thread it may make some kind of baffle or mufler from the shop to the unit.
Lin.
 
Look on Grizzley's site for what is called noise reducer they sell them they go on near the impellers
 
Even with a very quiet DC, you will still get a LOT of noise from the air movement itself. I have my Clearvue Cyclone outside the main shop with enough 6" ducting that I do not hear any noise from the impeller coming back though the pipe. I do still have to wear e-plugs when using the lathe just from the air noise. When moving 1,800 of so CFM though a 6" pipe, there is a lot of noise generated! If I am giving a lesson, I will usually open another blast gate and that help TREMENDOUSLY.

That said, my hearing is getting bad enough as it is from being around construction sites all day so I have now gotten into the habit of wearing a pair of corded ear plugs around my when I first get dressed in the morning! I will not even make a simply cut on my mitersaw, even without the DC running without using the earplugs.

Getting used to using them all the time is really facilitated by using really good ear plugs. I tried a dozen or so different ones and absolutely love the Peltor Skull Screws corded plugs. They are the no roll push in kind and can easily be inserted with one had. They are not like most push in that are hard and uncomfortable, though. They are nice and soft and very comfortable. They also have the highest noise reduction rating of any of the in-ear plugs, just as good as the best roll type plugs.

I buy them by the box of 120 pairs and actually have the box fastened to the wall by the door of my shop so they are read convenient if I loose a pair. I highly recommend them. Here is a link to see what I am talking about.

http://earplugstore.stores.yahoo.net/peltor-skull-screws-earplugs-corded-bx.html
 
+1 for what Curtis says. Anytime you are in the shop with anything running, hearing, eye and breathing protection is a must. I have ear problems that make plugs uncomfortable, so I have a pair of electronic ear muffs. A bit pricey but well worth the cost. I have worked in high noise areas most of my life so far, heavy construction. My hearing is damaged beyond repair. It will never be what it once was. Protect what you have now with the best you can find. Wood shops are noisy by definition. "I am in a hurry. This will only take a moment." Not an excuse. Wear all your needed PPE all the time. Been there and did it all wrong way too much.
Charles
 
You must log in or register to reply here.
Back
Top Bottom