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Thread: Slave/Master switch
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21st May 2009, 05:33 PM #1
Slave/Master switch
This may have been covered before - if so apologies.
Lee Valley market a product called:
Automatic Vacuum Switch
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This convenient, efficient device runs a shop vacuum only when it's needed – in unison with a power tool. Simply plug it into a regular 110-volt outlet and plug the tool and vacuum into their individual receptacles. When the circuitry senses the tool drawing power, it automatically turns the vacuum on. The vacuum continues to operate for six seconds after the tool shuts off to ensure the hose is cleared. The vacuum can also run independently at the flick of a switch. The unit has a 1-7/8" thick by 4-5/8" square ABS housing with keyhole hangers for temporary wall mounting and two 110-volt, 15-amp input cords (one 6' long, the other 18" long). One cord is used when tool and vacuum draw less than 15 amps; use both cords in separate circuits for greater capacity (30 amps maximum). Each cord has a built-in circuit breaker.
ETL listed for use in Canada and the U.S.
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</td> <td class="description" width="220">Automatic Vacuum Switch
03J62.10 </td> <td width="10"> </td> <td class="price" valign="top">$49.50</td> <td>
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Is this available as an Australian item or is there an equivalent device sold here in Oz?
Thanks in advance
SG.... some old things are lovely
Warm still with the life of forgotten men who made them ........................D.H. Lawrence
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21st May 2009 05:33 PM # ADSGoogle Adsense Advertisement
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21st May 2009, 05:49 PM #2Golden Member
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Just what I was looking for, but I do need an Oz version.
A 15Amp model would be ideal. Could take 2 15Amp inputs and power two separate 15Amp devices (e.g. tablesaw + vac). Hmmm ...___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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21st May 2009, 05:55 PM #3Golden Member
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Here's a 10Amp consumer version for 240V...
http://store.voltelectronics.com.au/...lave%20Control
Also noticed the model you posted takes two 15Amp inputs. Perfect!___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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21st May 2009, 06:21 PM #4Awaiting Email Confirmation
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Dear Scribbly & Afro,
That is definitely a very nice find, Afro! But Scribbly, the only thing is, though, with its own little 10A Circuit-Breaker in that Powerboard, it would not really be up to the job of switching in a proper Dust Collector if that's what you've got in mind - as opposed to just a Shop Vac. A cotton-pickin' Dust Collector will draw pretty-close to their maximum current no matter whether there's sawdust getting made or not, because they're still shifting air no-matter-what. Add some serious current from the triggering-Machine (when it hits the timber), and it's got to add up to more than 10A... (you've probably worked all of this out already...)
Best Wishes,
Batpig.
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21st May 2009, 06:34 PM #5Golden Member
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Should be fine for a shop vac and hand tools, but definitely want 15A system for a proper dusty. My 2HP dusty draws 7.7A so no way I can use that on the same circuit as my tablesaw.
___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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22nd May 2009, 04:31 PM #6
Jaycar sell this thing for $35
http://www1.jaycar.com.au/productVie...h&form=KEYWORD
It too will switch up to a 10A load once the master switch is activated - and the master switch can cope with an appliance up to 4000 watts. This is more than capable of running any normal 10A dusty.
However same rules apply as previously mentioned.....how many people would be game running a jointer and a dusty off the same 10A circuit? So the answer is to put the slave switch on a second circuit.....easyOurs is not to reason why.....only to point and giggle.
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22nd May 2009, 05:48 PM #7SENIOR MEMBER
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I am pretty sure Felder have something similar (might even have delayed start/stop) in their parts catalogue.
Joez
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23rd May 2009, 10:26 AM #8
Thanks for the replies fellas.
I did see this one SBD, but I didn't know where all those blue wires went to out of the bottom of this thing. Do you then need an electrician to wire it ...??
Also, how does one know which power points are on different circuits? They may be separate power points but on the same circuit.
Still puzzled about this.
I like the look and quality of the Lee Valley item, and was wondering if a similar item existed for Australia.
SG.... some old things are lovely
Warm still with the life of forgotten men who made them ........................D.H. Lawrence
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23rd May 2009, 05:14 PM #9Golden Member
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I contacted Lee Valley about it. They wouldn't let me know who their supplier was (which is fair enough), but did mention that the product is manufactured in China by Mbright Tools (who don't seem to have a website).
Their supplier wouldn't have a 240V/Aus version so contacting them wouldn't work, but if we can find a contact for MBright Tools, then that would be a good start I think.
Cheers,
Af.___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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23rd May 2009, 05:43 PM #10
That KEMO module M103 has the following specification:
10A at 24VAC
6A at 230VAC
That's only 1380W by my calc.
To connect anything higher (and consider the start-up draw) you need to connect another larger capacity relay to the module.
That's how I read the module instructions anyway - see here.
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23rd May 2009, 06:36 PM #11Golden Member
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___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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23rd May 2009, 07:23 PM #12
I was just browsing an old AWR - number 28 - and on page 39 there is an item called the "Automator".
At the time it sold for $275
It seems to be a similar device to the Lee Valley item.
At the time it was marketed by Gregory Machinery in Brisbane.
It doesn't appear on their website.
I wonder if it is still available?
SG.... some old things are lovely
Warm still with the life of forgotten men who made them ........................D.H. Lawrence
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23rd May 2009, 08:18 PM #13Golden Member
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Nice find. I just emailed them so let's see what comes of it.
I've been starting to dream up by "dream switch."
Inputs: 1 x 15A, 1 x 10A
Multiple "master" devices (e.g. tablesaw, thicknesser, jointer). These should all draw from the 15A input but only one at a time. So a nice big circular switch to select which "device" to want to power.
A single "slave" device (e.g. vac). This would draw from the 10A input and automatically switch on/off when it detects current from any of the master devices.
Anyone care to draw up a tech diagram for this? I can run it past my electrician to see what he thinks is possible.
Cheers,
C.___________________________________________________________
"The things I make may be for others, but how I make them is for me."
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23rd May 2009, 08:21 PM #14
With the indulgence of AWR here is a scan of the advertisement from volume 28
.... some old things are lovely
Warm still with the life of forgotten men who made them ........................D.H. Lawrence
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23rd May 2009, 08:37 PM #15
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