Thread: Auto On/Off Dust Extractors/Vacuum Cleaners

The flaw with all those simple tool initiated on-off switches is one should keep the dust extraction running for at least a few minutes and preferably 10-20 minutes after using the tool - otherwise the very fine dust just flows into the shed and never gets extracted.

G'day I use item 35397 from www.rockby.com.au. They only handle 1000W, but I modify them to handle 10 Amps which is a simple mod.
Have a look at that and the additional outlets in the same flyer. The remote includes one power outlet for the princely sum of $15:60 plus postage.

I understand stretched budgets but i just bought 1 of these shop vacs on ebay, works fine & at $70 its pretty cheap & has a max power takeoff of 1400w.

http://cgi.ebay.com.au/ws/eBayISAPI....2BSI%26otn%3D4

2nd the vacuum Ratttrap bought , I got the same, and was bought especially for the Domino.

G'Day

Thanks for responding.

BobL

I'm looking at a room dust filter to clear the air. The units I'm thinking of are just little shop vacs not full blown dust extractors so I don't know that they'd move much air if left on for a while. If I bought a proper dust extractor that would certainly be an SOP.

Watson

That RC switch looks neat. I can think of several applications for that, dust extraction included.

Ratter, Waldo

At $70 the ebay Shop vac has it! I'm tempted to buy two! One permanently mounted in the SCMS bench and another for all my other tools.

I'm sure I could get by on mung beans and leftover for the next few weeks.

Thanks again

regards

Manix

Hi Manix and others,

devices to control a vac parallel to a tool, can be bought separately. It is a little relay box with added electronics for current sensing and adjustable time delays. It is connected between the mains and the tool and has a second outlet plug connection for the vac (= any vac you already own). You just plug in the vac and set its own switch to "on" and let the device take over the control over on and off at the right times.

The superior types of such devices switch the vac not simultaneously but a second or so after the tool has started up, to spread the current peaks of both machines. This is handy for remote tool sheds or in the home, with limited fuse or mains wiring capacity.The time lag between tool switch-off and vac switch-off (necessary to empty the hose and clean any clogged remnants in the tool), is also adjustable. Cheap versions may comprise only a basic current sensing relay system (on and off exactly simultaneously) or may feature the time lag in vac switch-on only and lack the time lag in vac swich-off after tool switch-off.

Complete deluxe specialised options like the Festool vacs usually have all features mentioned above built in as standard, plus a motor soft start to further reduce its own current peak. Together with the multistage microfiltering and brand specific drawing-board-spawned systemised attachments and thingamejigs, these are all the ingredients that make any type of vac expensive. On a budget, watching out for a switching device to make an existing vac more versatile, might be the ticket.

greetings

gerhard

Master/slave switcher from Jaycar. $30.

www.jaycar.com.au and search for cat. no. AA0212 or master slave switch. 10 amp capacity.

Originally Posted by watson

G'day I use item 35397 from www.rockby.com.au. They only handle 1000W, but I modify them to handle 10 Amps which is a simple mod.
Have a look at that and the additional outlets in the same flyer. The remote includes one power outlet for the princely sum of $15:60 plus postage.

Hi Noel,

Hoping you will share what your simple mod is to have it handle 10amps.
Is it having the unit activate a relay whose contacts can handle 10amps?

Thanks in anticipation

Yes it is Baz,
I'll do a search and detail some suitable relays.......but it'll probably again use the www.rockby.com.au site as they are the $2 shop for electronic components.
In the past I've pulled the units apart and re-boxed them as usually the relays won't fit in the space provided. When this method is used, I leave the channel switch attached to its plastic bits, otherwise it falls apart.
I don't want to publicly display a circuit, as there is 240volt ac involved, but basically you replace the unit's relay with one that can handle the contact current.

I totally agree with the Gerhard. Furthermore, I really like you post. Thanks!

Originally Posted by Master Splinter

Master/slave switcher from Jaycar. $30.

www.jaycar.com.au and search for cat. no. AA0212 or master slave switch. 10 amp capacity.

I had a look at this online but it did not show what the blue cables go to or are, do they go to plugs that you connet to? Or do you have to wire them in to the system?

SB