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Thread: Dust extension
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7th March 2017, 09:08 PM #1
Dust extension
Hi guys been spending a lot of time on the Big Blue Monster (Excalibur 30) and I was wondering who uses a dusty with there scroll saw?
i have a 1hp under bench one I can hook up its nice and Quiet
just got to get fittings and smaller hoseDANGER!!!!I'm Dyslexic Spelling may offend!!!!!
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7th March 2017, 09:38 PM #2.
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While a super high air flow rate is not needed for a scroll saw, a significant problem that most scroll saw operators don't seem to understand is that nearly all dust extractors simply do not trap the finest dust that machines like scroll saws generate.
I have tested several of those under-bench 1HP DC and they are the worst performers of all the DCs I have tested.
It's not the dust you can see that is a health problem but the invisible dust that most DC filters and especially those on the under-bench 1HP DCs just cannot contain.
This is further compounded because scroll saw operators are like lathe operators in that they work relatively close to the source of the dust making so are subject to greater exposure.
I suggest you head over to the Dust forum and have a read of some of the threads there to see what is required to adequately control fine dust.
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7th March 2017, 11:43 PM #3
Yes. I use a 2hp dusty with a 4" hose when using the scrollsaw.
The saw is plugged into a Festool vac with auto-on and the standard hose plugged into the bottom under-table collector I modified (the original Excaliur was lame). The suction is turned to low to keep it quiet.
Additionally, I just rest the 4" pipe near the arm and suspend it somewhat from the roof with occy straps. This lets me move it around. This generates heaps of air for the tiny output of the saw.
It surprises me that better collection isn't part of the overall design.
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8th March 2017, 12:31 AM #4.
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I like the occy straps idea rWP but it doesn't surprise me that these machines are poorly designed for catching dust. It really is no different to just about all other wood working machines out there.
Most of the really fine dust will follow air currents and blade direction - remember the blades on a SS moves just as often upwards as it does downwards. Cutting wood generates slightly heated air which rises away from a Scroll Saw table so the super fine dust will ride these warm air upwards away from the table. The chances of this being captured by anything underneath a table is near nil.
Dave Reed uses a 2HP system connected to an over head 6" bell mouth hood above his lathe.
DRsetup.jpg
With a bit of an extension to the flex he is going to be able to swing the bell mouth over above his nearby scroll saw and it should take care of the fine dust just like it does from his lathe. I've tested it on his lathe and it works very well.
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8th March 2017, 09:41 AM #5
Bobl please stop completing this thread it was not a question on dust extraction its was a question asking who uses one and what do the use.
Thanks for hijackingDANGER!!!!I'm Dyslexic Spelling may offend!!!!!
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8th March 2017, 10:16 AM #6
How incredibly rude.
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8th March 2017, 10:40 AM #7.
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The way I read your post you said you are spending a lot of time on a big scroll saw and plan to use it with an under-bench 1HP DC?
I would have thought it would have been of some value to any wood workers health to know how poorly those DCs perform.
Whatever DC is used on a scroll saw, all these saws appear to be inadequate in terms of the connections provided for fine dust collection.
It's not just a problem for scroll saws, all small WW machines have this problem.
Is that not useful information either?
At the men's shed, at last count we had 3 scroll saws but as they hardly get used they have not been a priority for connection to the dust extraction system. I have looked at their dust extraction connections and have decided their connections will either have to be rebuilt or maybe the whole saw placed inside 4 sided vented bench top enclosures.
I would for one would be interested to know if anyone has done this and if so post some pictures of their setups
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8th March 2017, 01:29 PM #8
On the underside of mine (a 21" Excalibur) it came with a flat little plastic thing. It was only about 7mm tall and the airflow capability would strangle a cat.
In pretty short order there was dust underneath and on top everywhere. I hate noise more than dust too
There were a few videos I watched when first starting out and I was surprised at the lack of collection even professionals used. This encouraged me to sit outside when its nice and do some scrolling in the sun. Its very therapeutic!
But Canberra is a place where idyllic days are rare- UV levels to strip paint, blistering heat or bone cold are the norms, so inside I came up with a compromise.
Underneath there is a modified yogurt container (the nice tough clear plastic) with a 36mm nozzle attachment. This catches the downward thrust stuff which seems to be the nastiest. It doesnt have an end, it simply acts like a "tunnel". Its been my intention for ages to change this for a PVC one.... intentions!
On top is similar to the photo BobL posted with the lathe, but far less.... elegant. Its literally the pipe from the DC, hanging in place with 2 long occy straps, one further back to keep the pipe flat and even with the one in front. The front one is simple located "close" to the work, either to the left or right of the jigger-arm. I simply bat it to the other side as needed for clearance.
I've found the volume of air from the 4" easily sucks up all the bits and floaters.
However, I do have one of BobL's new 4" bell mouthed horns which will go on the 4" hose, plus a few for the 6" that will replace it. Im a bit unreasonably excited about these, especially for the lathe. The BMH will really help with the scrollsaw.
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8th March 2017, 02:01 PM #9
Hey Dave, What the heck are you worried about; DUST COLLECTION FOR A SCROLL-SAW...
Get off the grass sport and get real, they product next to nothing of saw dust so why are you asking such a NON ISSUE question...
Just connect up your shop vacuum, problem solved, that's if there was ever one... Cheers, Peter
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8th March 2017, 03:17 PM #10.
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They do indeed produce next to nothing "that can be seen" but unfortunately like a lot of wood working gear and wood dust, "what you see is not what you get".
Total Exposure = dust levels X time exposed
If a SS user was to use one for a couple of hours a month there would indeed be little to worry about but even a little dust over a long time period does add up to significant exposure.
My main concern with the OP was less the SS and more the use of a 1HP DC. These and many other DCs continuously spew out fine dust even when when it not collecting any duct from the SS - if you want to know how it does this post something in the Dust forum about it.
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