Thread: Slave/Master switch

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 ...

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!

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.

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.

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.....easy

I am pretty sure Felder have something similar (might even have delayed start/stop) in their parts catalogue.

Joez

Originally Posted by SilentButDeadly

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.....easy

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

Originally Posted by Scribbly Gum

I like the look and quality of the Lee Valley item, and was wondering if a similar item existed for Australia.

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.

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.

Originally Posted by nt900

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.

I just had a quick read and that's what I understood too. If your initial draw is above 1380W (6A at 230V) then the relay will blow. You need a bigger unit.

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

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.

With the indulgence of AWR here is a scan of the advertisement from volume 28

Originally Posted by Afro Boy

Anyone care to draw up a tech diagram for this?

Here is a conceptual diagram I was working on. The question is how to have both M103 modules manage the relay.

I imagine a shop made switch, containing the necessary electrical components in a housing, with suitable amperage powerpoints on the outside.