Author Topic: Dust extraction  (Read 5687 times)

Offline fuzzyturns

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Dust extraction
« on: February 13, 2017, 10:34:26 AM »
I am busy kitting out my new workshop and was planning on having a chip extractor in a cubicle with ducting running throughout the workshop. There will be about 8 outlets (lathe, 2 x radial arm saw, bandsaw, mitre saw and a few spares), mostly 4" piping, with some outlets reduced to 2.5", total pipe length probably around 20m.
At the moment I am looking at one of the bigger units from CamVac, probably the 336 with twin motors, or maybe the 386. Does anybody have any experience with these units when linked to an extraction system (as opposed to being linked to a single machine)?
Any advice on the subject will be highly welcome.

Offline john taylor

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Re: Dust extraction
« Reply #1 on: February 13, 2017, 02:05:18 PM »
I have the Camvac 336 with twin motors and 2.5 inch inlets which I brought back in the day when Camvac was still owned by the family which invented them so it is a good few years old.   

I am probably tempting fate here but I have had no problems with it at all.  One tip I was given is to run the pipe work in the same size tube as the intlet and only alter the size at the last moment this is to get the most suction from it, also if possible avoid 90 degree bends as far as possible.

My workshop is my garage and I have the piping running along both sides of it with blast gates at several points and at each outlet.   It currently serves 2 lathes and one spare inlet on one side and the bandsaw and a spare inlet on the other and is about 9 to 10 meters in total length.  I have a friend who installs vac and air conditioning systems and we did a test to check on air flow and according to his equipment the loss of suction was negligible at each outlet.

Over the years I have made a couple of changes to it to make it better the first one is to reduce the noise and heat output in the shop.   I have a false wall across the front of the shop to block the double doors and there is about a 10 inch gap between the wall and the doors. I have put a hose on each of the motor outlets and piped it through the wall this reduces the noise considerably and also keeps a lot of the heat out of the shop.  If it is very cold in winter I can pull the hoses back into the shop for extra heating if needed, there is still a fair bit of noise but this is coming from the air inlets and there isnt anything you can do about that.

The other problem with them is cleaning them out I found I was having to do this at least once a week and sometimes more due to lose of suction as well as the bin filling up. This involved taking the cloth bag out and cleaning it and then emptying the collection bin, I have a couple of spare cloth bags so I used to wash the dirty one which was not the best thing for the washing machine or the bag. So I brought some disposable bags for it these ones https://www.equip4work.co.uk/cleaning-and-hygiene/vacuum-cleaners/accessories-and-spares/numatic-10x-nvm-5bh-hepa-flo-open-filter-bags-604020.html and that made life a lot easier as once they get too blocked you just throw them away and put a new one in.

It still didn’t solve the problem of having to take the camvac apart to clean it once or twice a week so after some research and experimenting I brought a dust deputy cyclone and 30 litre collection barrel from here http://www.toolovation.co.uk/category_s/125.htm This has made life a lot easier as all I need to do is unclip the top of the barrel and empty it which takes about 2 minutes and I only need to check the Camvac filters every 3 or 4 times I empty the barrel, even then there is only a small amount of dust in it and the suction does not noticeably drop at all.

Below is a photo of my system

John



Offline seventhdevil

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Re: Dust extraction
« Reply #2 on: February 13, 2017, 05:09:59 PM »
i don't have a camvac but recommend how i've set mine up. goes straight into a wheelie bin. nothing goes into the bag except 2" of dust over about 6 months...

you can see what i wrote on a previous thread.
https://www.awgb.co.uk/awgbforum/index.php/topic,3956.0.html


annoyingly i think they are out of production at the moment.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=182142991141#ht_1787wt_714

my extractor is this one.
http://www.axminster.co.uk/axminster-hobby-series-fm300bc-extractor-501264
« Last Edit: February 13, 2017, 05:13:32 PM by seventhdevil »

Offline fuzzyturns

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Re: Dust extraction
« Reply #3 on: February 14, 2017, 09:54:30 AM »
Gents, thank you very much for the comments. I especially want to say thank you to John, going to such lengths deserves a 12 out of 10 (if we had ratings on posts). Exactly what I was looking for.

Offline Docjohn

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Re: Dust extraction
« Reply #4 on: February 14, 2017, 08:31:18 PM »
I have used a Camvac 336 similar to John's for about 8 years with no problems; I originally tried it with a 4" out let but was a bit disappointed with the suction force (I'm sure this will have a correct term?) however it works so much better with 2.5" outlet. I too have it ducted with blast gates. I've also gone down the cyclone route but mine is an upside down road cone (dead cone base had broken off!)
Regards John (lot of us about!!)

Offline Lazurus

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Re: Dust extraction
« Reply #5 on: February 15, 2017, 07:44:24 AM »
i don't have a camvac but recommend how i've set mine up. goes straight into a wheelie bin. nothing goes into the bag except 2" of dust over about 6 months...

you can see what i wrote on a previous thread.
https://www.awgb.co.uk/awgbforum/index.php/topic,3956.0.html


annoyingly i think they are out of production at the moment.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=182142991141#ht_1787wt_714

my extractor is this one.
http://www.axminster.co.uk/axminster-hobby-series-fm300bc-extractor-501264


I emailed the makers of the cyclone Steve suggested as I am keen to get one myself the reply was as below


Unfortunately we don't have any in stock at the moment but we will have them in a month or two.

Kind regards
David Adamides
 
 
OMNIPOLE SYSTEMS LTD
Phone: 0208 4056781/2
Email: omnipole@btinternet.com
Website: www.omnipole-systems.com
Address: 3 Hermitage Lane, London, SE25 5HH
Living and working on the Norfolk Broads

Offline seventhdevil

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Re: Dust extraction
« Reply #6 on: February 15, 2017, 10:48:57 AM »
i know £150 seem like alot but i still maintain that it's one of the best purchases i've made that hasn't been wood...


are you going to get one stuart?

Offline Lazurus

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Re: Dust extraction
« Reply #7 on: February 15, 2017, 11:43:52 AM »
Yes I have had my wheelie bin for ages since we last discussed the cyclone, but since then they have been out of stock.
Living and working on the Norfolk Broads

Offline George Watkins

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Re: Dust extraction
« Reply #8 on: February 15, 2017, 03:04:29 PM »
I bought some tools for my dad from this company before xmas and noticed they had the cyclones for sale
http://www.toolovation.co.uk/category_s/98.htm

I had a triple motor camvac with 6 metres of 2 1/2" ducting to my lathe and it was o.k to pull away the sanding dust, I had mine in another room as it was too loud for me to have in my workshop.

I upgraded to one of the axminister cylocne extractors and that is much better both in terms on noise and suction
http://www.axminster.co.uk/axminster-industrial-series-ub-2200veck-cyclone-extractor-210642

Offline fuzzyturns

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Re: Dust extraction
« Reply #9 on: February 16, 2017, 09:04:25 AM »
I'll definitely have a look at the various cyclone options. Looking at the extractor that George bought himself: yeah, i'd love to have one of those, but at £1800 it's just a wee bit on the dear side. And it's a little too big for my workshop, too.

Offline seventhdevil

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Re: Dust extraction
« Reply #10 on: February 16, 2017, 03:34:30 PM »
also it's only got a tiny bin for the shavings. if you work alot it would keep needing to be emptied...

Offline George Watkins

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Re: Dust extraction
« Reply #11 on: February 16, 2017, 03:46:51 PM »
as a woodturner I don't use an extractor for shavings but its bigger than the camvac

..and easier to empty   ::)

Offline fuzzyturns

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Re: Dust extraction
« Reply #12 on: February 17, 2017, 09:14:58 AM »
Yes, true, but it's also 5 times more expensive.