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  1. #91
    Join Date
    Jun 2004
    Location
    sydney
    Posts
    77

    Wink Dust Extractors/Cyclone

    Been trying to rig up a mini cyclone. Seen a few sites on them but how far down the cone does the vacuum tube have to be? If its in the cone wouldn't it suck up all that stuff that's going into the botom bin? All the pics I've seen have that part covered. At the moment my dust extractor is just the atmosphere at the backyard-the stronger the breeze the better the extraction. Nuisance having to lug the workcentre/ext table outside-Just got it covered with some plastic sheeting-at least it hasn't been raining here. Also can't use it when the clothes are on the line

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  3. #92
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,786

    Default

    Page 5 of this thread has the answer. The pipe finishes at a point which is around 50mm short of being level with the top of the funnel. Mine is slightly longer, finishing around 30mm short of the funnel. It doesn't seem to make much idfference, as long as it finishes close above the funnel somewhere. I'd start longer and cut it off a bit at a time once you are ready to test it out.

  4. #93
    Join Date
    May 2004
    Location
    Pakenham, outer Melb SE suburb, Vic
    Age
    55
    Posts
    4,158

    Default

    Quote Originally Posted by Gumby
    Page 5 of this thread has the answer. The pipe finishes at a point which is around 50mm short of being level with the top of the funnel. Mine is slightly longer, finishing around 30mm short of the funnel. It doesn't seem to make much idfference, as long as it finishes close above the funnel somewhere. I'd start longer and cut it off a bit at a time once you are ready to test it out.
    I think I read somewhere in some cyclone specs that the minimum length of the centre pipe should be approx the inlet diameter size below the inlet pipe to prevent material going straight from inlet to outlet.....Sean

  5. #94
    Join Date
    May 2003
    Location
    North Ryde, NSW
    Age
    51
    Posts
    98

    Default

    Cheers Sturdee, I spent a couple of hours of the weekend hacking into my Triton dust bucket with some trepidation. Your system went together surprisingly easy, and the difference is mind blowing. NO dust at all in the vaccuum bag. Waaaaay more suction. Thanks again!!
    "I may be drunk, but you ma'am, are ugly. Tomorrow, I will be sober." Winston Churchill

  6. #95
    Join Date
    Jun 2004
    Location
    Grafton, N.S.W.
    Age
    63
    Posts
    1,330

    Default

    G'day All.

    For the life of me, I cannot find the plan on the Triton website that you are all talking about.
    I go to Sturdee's projects but nothing loads.
    Can some one give me a link to the correct page?

    Thanks.
    Hooroo.
    Regards, Trevor
    grafton

  7. #96
    Join Date
    Aug 2003
    Location
    Perth, WA
    Posts
    1,251

    Default

    Try this

    http://www-personal.monash.edu.au/%7...tter/oct03.pdf

    Newsletter from the Triton Woodworkers Club, Holmesglen.
    http://www.tritonwoodworkers.org.au/

  8. #97
    Join Date
    Jun 2004
    Location
    Grafton, N.S.W.
    Age
    63
    Posts
    1,330

    Default

    Thanks Sprog.

  9. #98
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,786

    Default

    I've just shortened the outlet pipe on mine. I'm not sure it has made a big difference. I still get very fine dust in the vacuum after a lot of use but I'm being pretty fussy, it's a great setup. I might cut some more off and see how it goes.

    I also think that ledge on the inside of the bucket collects too much dust and I want to create something to make it sloping. It's going to be called the 'Gumby' mod to the 'Sturdee' mod. (how about that Pete ?) :eek:
    If at first you don't succeed, give something else a go. Life is far too short to waste time trying.

  10. #99
    Join Date
    Jun 2003
    Location
    ...
    Posts
    7,955

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    On friday whilst John and Janet were inspecting my shop we opened the vacuum cleaner to see how much sawdust had collected in the bag. We could find nothing and that was after vacuming about 50 litres of sawdust over the last 4 months since I last looked.

    Gold leader you won't be disappointed with the mod. I have just got myself a new paint drum as I need to make another for my dedicated sanding station. They seem to multiply.

    Gumby, go for it mate, all you need is a $ 2 gapfilling cartridge from Bunnings, a spatula and some artistic flair or maybe use some playdough.

    Trevor, thanks for your comments about your difficulty in finding the details of the mod, bits are posted under various threads and in various locations. I'll try to find them all and create a new thread quoting all the references.
    Meanwhile if you have difficulty in finding all let me know and I'll email them direct to you.


    Peter.

  11. #100
    Join Date
    May 2003
    Location
    North Ryde, NSW
    Age
    51
    Posts
    98

    Default

    I found my funnel at a 2 dollar shop. Well actually it was at Lane Cove, so it was $6.99. But the diameter was actually BIGGER than the Triton dust bucket, so some careful time at the bandsaw and sanding machine got the funnel in with a close interference fit. No ledge in my bucket!
    And the paint drum was sourced of all places from bunnies. And it had never had paint in it, so was clean as new.
    An 80mm (or thereabouts) Hole saw took care of mating holes through all the necessary components.
    All in all a top mod, I'm blown away by how good it works, and how easy it was
    "I may be drunk, but you ma'am, are ugly. Tomorrow, I will be sober." Winston Churchill

  12. #101
    Join Date
    Jan 2005
    Location
    Wodonga, Vic.
    Age
    72
    Posts
    40

    Default

    Our local Mitre 10 (Wodonga) has 280mm diam funnels at the moment - on one of the "cheapies" tables that they put up now and then - maybe other Mitre 10s do the same? They are "Lion" brand and are selling for $5.95 but are probably out of the same factory in China that produced the 2 dollar shop ones.

    Like Gold Leader's experience I found it was a simple job to take a bit off the top rim and get a good squeeze fit into the bottom of one of Bunnings' 20 litre buckets (as per Barry White's cyclone approach but with no ledge at the top to trap dust).

    Works like a charm.

    Jeff.

  13. #102
    Join Date
    Jan 2005
    Location
    Wodonga, Vic.
    Age
    72
    Posts
    40

    Default Fine dust getting through

    Quote Originally Posted by Gumby
    I still get very fine dust in the vacuum after a lot of use but I'm being pretty fussy, it's a great setup.
    I haven't had my Sturdee/Barry setup working for long enough yet to see how much fine dust is getting through to the vacuum cleaner paper filter.

    But thinking about these mini cyclones (as opposed to dedicated shop cylones) I wonder if the on-off nature of their use when used with small tools could explain some of the fine dust getting through? Presumably every time you switch them on, there is a net movement of air up from the collection drum and cone towards the exhaust tube, as the presure inside the whole unit (drum, funnel, upper bucket) drops. Once it's running that's not a problem, but in the startup, possibly fine dust which is adhering to the surface of the funnel, and maybe from the collection drum, gets dislodged and sucked into the vacuum cleaner before the swirling action of the cyclone gets established. That might account for a lot of what's appearing in the bag.

    Maybe Wayne or other cyclone gurus who know more about their behaviour could comment?

    Cheers...Jeff.

  14. #103
    Join Date
    Jun 2003
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    ...
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    7,955

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    Jeff,


    You probably are correct with your deductions as to why some dust still gets through with the mini cyclones. This would also be true for the big cyclones as all that I have seen have a final filter attached to it.

    However, the amount that gets through to the bag is so small that if you have to clean the bag once every six month of a little bit of dust, which hasn't caused any lack of suction, you have to be really fussy to worry about it.


    Peter.

  15. #104
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,786

    Default

    A few posts back, I said I'd cut the return pipe a bit shorter. I'm happy to report that there seems to be a noticable reduction in fine dust in my vacuum unit since I did that.

    The pipe now comes down approx half way between the lid and the funnel. Evereything else is still fine so I'm sure it's an improvement on my setup. I wonder though, that we seem to get different reports about fine dust collection and i think it has to be due to the differences in each vacuum unit which does the sucking. mine is only a small machine and maybe something with a bit more grunt would reduce the dust even further - just a thought. (But I'm still very happy with it Pete ! Sure beats the original Triton setup.
    If at first you don't succeed, give something else a go. Life is far too short to waste time trying.

  16. #105
    Join Date
    Jul 2004
    Location
    Brisbane
    Posts
    114

    Default

    Sorry to revive this very old thread, but I have a question.

    I have found a source for a 300mm diameter funnel, which will save me making my own cone. However, it's a pretty shallow funnel: it's about 170mm deep.

    I think most of the cones I've seen in mini cyclones built by you fellas are a deeper V than that.

    Do you think this will work?

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