Thread: Slave/Master switch

Originally Posted by Afro Boy

Nice diagram. I think something like that would work nicely with your setup. For me, I would only be running one machine at a time so one 15A input and one 10A input would be more than enough.

This is why I was heading down the modular design path.

15A for the extractor just for some headroom.
Start with one primary machine, and know the circuit design can accommodate a second machine and M103 module if required in the future.

But for a strictly single primary machine configuration that would be easy. The electronics (M103 module and relay) are inexpensive and even using a quality housing and quality 230V plugs and sockets it would not cost much to make up.

A relay like these would suit:
Double pole.
Single pole.

I am still interested in a twin or more machine solution if anyone with electronics background would care to contribute to a design.

There's always this product from Jackson http://www.ji.com.au/products/PT9778/
http://www.ji.com.au/pdfs/PT9778.pdf plus something similar from Crest called Earth Smart.

Originally Posted by SilentButDeadly

There's always this product from Jackson http://www.ji.com.au/products/PT9778/
http://www.ji.com.au/pdfs/PT9778.pdf plus something similar from Crest called Earth Smart.

Hi SBD.

Functionally the Jackson device is good, but just can't cope with either master or slave machines greater than 10A. Bugger.

Searching around, I found this older thread. Looks like similar discussion to ours.

I have sent an inquiry to Gregory Machinery to see if something is still available.
Will get back to you.
SG

Originally Posted by Scribbly Gum

I have sent an inquiry to Gregory Machinery to see if something is still available.
Will get back to you.
SG

Received a reply today from Gregory Machinery.

Hello tom,
<o></o><o></o>
We have 2 sizes available in stock, 1 is 1-15amp with 10 amp plug and the other is 4-25amp with a 15amp plug on it. Both these units now cost $350.00 inc gst and are still made in <st1:country-region w:st="on"><st1>Australia</st1></st1:country-region>
I hope this helps<o>></o>>
<o>> </o>>
Best regards<o>></o>>
Phil Luyten

So they are available and are Aussie made.
I'm not a power junkie and I don't understand what the figures quoted mean.
How do each of those two units translate into what machines they will operate?
Thanks
SG

Made in Australia......I don't think so!!! Nice product though.

http://www.ecogate.com/contact.htm

Scribbly Gum, did you ever get one of those automaters?


I am keen to get one but my i am not 100% sure i would get away with running my saw's / dusty on the one circuit.

Worst case will basically be running 2 x 4hp machines (4hp bandsaw, 4hp dusty) on the same 20amp circuit...


joez

I bought one but have yet to use it. If you look at url mbrightsolutions.com (Canadian) their logo is almost identical to MBright Tools Inc. on url ivacswitch.com/index.php (also Canadian).

You might contact mbright solutions about a 240v version. If a big enough market exists they might well produce one.

I do not know the construction of the ivac but hope that the vac power is relay controlled. I once used an isocket 110m that, when it failed, output a low voltage to my vac. Some motors can be damaged by low voltage for too long a time. When your power tool is on and you have ear protection you can't hear the vac and long exposure could be bad.

Sorry, the isocket is only for 120v.

Originally Posted by nt900

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.

If you tell me how the Thicknesser, Extractor & Planer are to work together (ie do you use all 3 of these together or only 2 at a time?), I can provide you with a circuit diagram.

The big question I have is can one of these M103 units withstand the locked rotor current of a motor without destroying itself (& other equipment)?
From a design point of view, using one of these units is a good idea...providing you have your equipment & the wiring appropriately protected. Quite simply, "protection" means "dollars". If the want reliability & if you value your equipment, you will provide appropriate protection.

I notice that occasionally, technical questions of an electrical nature are discussed here. Do you gentlemen not realise that there is a forum NEXT DOOR that can provide you with answers to many of your electrical questions? The link is below:
PLUMBING, ELECTRICAL, HEATING, COOLING, etc - Renovate Forums

I know this is a dead thread, but it got me thinking, so i have refreshed it here
https://www.woodworkforums.com/f13/ma...9/#post1493226