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30th September 2012, 12:58 PM #16
My DC costs about 65 to 70 cents/hr, 3kw (4hp) certainly I would like it to be less but for 2 to 3 hrs use a day I think it is reasonable, there is more I can do to improve the DC itself, associated piping/hose and collection points/hoods, as I see it, this is Soundman's point....How much do we have to do to collect a high percentage of dust, from statistics (bell curve) it becomes harder and harder to get further improvement after an initial modification that we might make to a dust hood or such, I am assuming here that an improvement was made rather than going backwards. A simple mod might be a bell mouth to a pipe inlet, Does that improve flow and is it worth doing? I would say a definate yes, a small improvment but every bit helps. If I didn't know about a bell mouth and if I was chasing one or two percent improvement that mod might be the one I was looking for and a forum like this is where a lot of us find out that bit of info.
However for the biggest percentage of dust collection there would seem to be a minimum of hp/flow/airspeed that does collect enough particles big and small.
I don't know how efficient my system is at collecting a range of particle sizes, I have been in the "up to the armpits in s##t", but now I can wipe my bum, there are some wood cutting operations that like SM says seem to defy dust collection and makes a mess but perhaps it just takes a different bum wiping method to effectively wipe, realistically I'll probably never be at the very top of the curve, if I can acheive a level of dust collection that doesn't harm that will do me
Pete
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30th September 2012, 01:13 PM #17GOLD MEMBER
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My thought on this is does it actually matter whether or not we have to get out the broom after using tools in a home shed? I use a powered dust mask when I am working. WHen I actually have a permanent shed set up I will probably look at cross ventilation and/or a room filter to remove airborne dust to prevent it going into lungs after the mask is removed. That can be a fairly low power/low cost option to protect health from what I understand. I am then more than happy to sweep/vacuum up the stuff that isn't a danger to my health, hence efficient chip extraction is a low priority. Am I understanding something poorly?
The other day I described to my daughter how to find something in the garage by saying "It's right near my big saw". A few minutes later she came back to ask: "Do you mean the black one, the green one, or the blue one?".
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30th September 2012, 01:28 PM #18
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30th September 2012, 06:08 PM #19
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30th September 2012, 09:35 PM #20
Ya probably understanding just fine.
If ya like most of us you havn't got a lazy couple of grand to spend on a truly effective dust extraction system, so ya gona be sweeping or vacuming, and ya probalby need to be wearing a dust mask of some sort at times.
If ya worried about sweeping circulating the evil and tretorous "invisable dust", ask ya self how that "invisable dust" got on the floor in the first place.....it almost certainly fell out of the air, unless the fairys put it there.
Now if you go to suck the dust up with a vacume cleaner you will simply be spewing "invisable dust" into the air at a great rate, because the filtration on most workshop vacume cleaners is pretty poor....lots of houshold vacs are not much better......we can talk about "invisable dust" in the home another time.
There has been some ongoing discussion as to the effectivness of those interiour air filters.....some postulate that they actually continue to circulate very fine, dare I say it "invisable dust", that would otherwise settle out of the air....( probably fall on the floor where we could sweep it up )
One of the most important things to consider with any workshop is ventilation, no dust extractor or air filter will do a damn thing about gassious fumes, and there are plenty of those involved in woodworking and good ventilation will remove the "invisable dust" far more effectivly that anything else.
Good ventilation is far cheaper than realy effective dust extraction and solves many problems appart from..you guessed it "invisable dust".
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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9th October 2012, 05:15 PM #21Senior Member
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Hey Doug, there are no guarantees that some small microbe totally unrelated to woodworking might beat the dust to it, so don’t give up what you enjoy for what might happen. You have to take as much care as you can afford / see practical and from there just take it as it comes.
I won’t give up riding a motorbike because of what might happen. It has been 40 years next year since I first rode a bike, and still Mr dead hasn’t jumped me… Doesn’t mean he won’t tomorrow, but I’m not going to waste today worrying about it.
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9th October 2012, 09:46 PM #22
It is my view that a workshop with clean air free of " Invisable Dust" simply is not practicaly achieveble for most of us, only by use of high efficiency dust extraction.
However by opening some windows and doors, perhaps installing an exhaust fan and may be puuting the dust extractor out side.......and using some sensible PPE, we can enjoy healthy woodworking.
Just like we can reduce the chances of death or serious injury from motorbike, simply by learning to ride defensivly, buying a good set of leathers and above all wearing a helmet.
You can die very very easily, and even easier ge messed up good, if you are stupid on a motorbike, take some sensible precautions and you can live long enough to die from old age.
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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9th October 2012, 11:00 PM #23
We are all going to die, it's just not knowing when and how that makes life exiting.
Enjoy it while you can.
RegardsHugh
Enough is enough, more than enough is too much.
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10th October 2012, 07:06 AM #24Senior Member
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Hi Soundman
Now don't take this the wrong way i am only "taking the p#ss" as aussie's do, but having seen your shed and health problems from dust is the least of your worries i think your wife will find you banged up on the floor after you tripped over something on the floor and hit your head on the way down.
Only joking Mate
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10th October 2012, 12:58 PM #25Senior Member
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- Brisbane
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Soundman - Sometimes despite your own still stupidity you can still live long enough to wonder how you did it, that certainly has been the case for me. I should have been dead a thousand times over, and that is why every day I wake up in one piece, I count my blessings that I am still here, and enjoy every day like it is my last day, because one day I will be...
Exactly... as they say don't take life too seriously you won't get out of it alive.
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13th October 2012, 11:04 AM #26Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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