How do I make this switch work?

[j]

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on. Sears sells a switch that is
the right idea but it only works for 2 tools on the same 110volt circuit

http://www.sears.com/sr/javasr/product.do?BV_SessionID=@@@@1411227950.1068401263@@@@&BV_EngineID=ccdladcjlgihhfhcehgcemgdffmdflg.0&vertical=TOOL&pid=00924031000&bidsite=CRAFT

I don't think that it can be very difficult. can someone point me in the
right direction to start figuring outhow to make one that is more flexable?

tia
jw

jw_nyc at yahoo dot com

 

[Michael]

Why cant you use dust collectors and tools of the same voltage?

If the sears device you are describing is a device which detects when
a tool is drawing current, and then switches on a vacuume, then there
is no reason why you cant run as many tools as you like from it
providing you dont overload it by using too many tools at once.

j <j@nospam.yea> wrote in message news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on. Sears sells a switch that is
the right idea but it only works for 2 tools on the same 110volt circuit

http://www.sears.com/sr/javasr/product.do?BV_SessionID=@@@@1411227950.1068401263@@@@&BV_EngineID=ccdladcjlgihhfhcehgcemgdffmdflg.0&vertical=TOOL&pid=00924031000&bidsite=CRAFT

I don't think that it can be very difficult. can someone point me in the
right direction to start figuring outhow to make one that is more flexable?

tia
jw

jw_nyc at yahoo dot com

 

[j]

Michael wrote:

Why cant you use dust collectors and tools of the same voltage?

I suppose I could get a new dust collector that would run on 220 volts
but then because of the amount of amps these tools draw I wouldn't want
to run them on the same circuit anyway.

If the sears device you are describing is a device which detects when
a tool is drawing current, and then switches on a vacuume, then there
is no reason why you cant run as many tools as you like from it
providing you dont overload it by using too many tools at once.

yes, but you've hit the nail on the head. The tools I want to use draw
too much current to run on one circuit. In addition there is a limit to
the number of amps you can run through the Sears defice, I think it is
10 amps or so

jw

j <j@nospam.yea> wrote in message news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on. Sears sells a switch that is
the right idea but it only works for 2 tools on the same 110volt circuit

http://www.sears.com/sr/javasr/product.do?BV_SessionID=@@@@1411227950.1068401263@@@@&BV_EngineID=ccdladcjlgihhfhcehgcemgdffmdflg.0&vertical=TOOL&pid=00924031000&bidsite=CRAFT

I don't think that it can be very difficult. can someone point me in the
right direction to start figuring outhow to make one that is more flexable?

tia
jw

jw_nyc at yahoo dot com

 

[N. Thornton]

j <j@nospam.yea> wrote in message news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on.

I don't think that it can be very difficult. can someone point me in the
right direction to start figuring outhow to make one that is more flexable?

A current relay in the supply to the power tool can switch your 110v
when tool is powered. A small number of turns of thick wire on a
standard relay would do it, long as its contacts are suitably rated.


Regards, NT

 

[Jim Thompson]

On 9 Nov 2003 16:31:49 -0800, bigcat@meeow.co.uk (N. Thornton) wrote:

j <j@nospam.yea> wrote in message news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on.

I don't think that it can be very difficult. can someone point me in the
right direction to start figuring outhow to make one that is more flexable?

A current relay in the supply to the power tool can switch your 110v
when tool is powered. A small number of turns of thick wire on a
standard relay would do it, long as its contacts are suitably rated.


Regards, NT

Pondering my navel here... I wonder if you couldn't drive a
low-voltage relay via a current transformer? That would save you
having to try to put a winding on a relay bobbin that you probably
can't get your fingers into.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Rheilly Phoull]

"Jim Thompson" <invalid@invalid.invalid> wrote in message
news:a9ntqvsg77vtudh6b0sc8v5s6tnr3cschm@4ax.com...

On 9 Nov 2003 16:31:49 -0800, bigcat@meeow.co.uk (N. Thornton) wrote:

j <j@nospam.yea> wrote in message
news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on.

I don't think that it can be very difficult. can someone point me in
the
right direction to start figuring outhow to make one that is more
flexable?

A current relay in the supply to the power tool can switch your 110v
when tool is powered. A small number of turns of thick wire on a
standard relay would do it, long as its contacts are suitably rated.


Regards, NT

Pondering my navel here... I wonder if you couldn't drive a
low-voltage relay via a current transformer? That would save you
having to try to put a winding on a relay bobbin that you probably
can't get your fingers into.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

How about a 110vac relay powered by one of the switched outlets ??

--
Regards ............... Rheilly Phoull

 

[j]

OK so there is something called a current relay that I might be able to
use. Is this something I should be able to find at an el;ectronicds
supply house? Maybe someplace on the internet? Any recomendations?


How are current relays rated and how do they work. The relay is an
on/off switch activated by the rise and fall of current. Are they rated
for switched and switching volts and current? Can I say I want a current
relay that that will sence the current in a 220 volt appliance, the max
current on the appliance will be 15 amps and I want the switch activated
at threshold of 2 amps. The appliacne being switched will have voltage
110 and max amps of 15. That is in effect what I want to do and if I can
buy that for $5 - $7 I can wire it up myself.

thanks

jw


jw_nyc at yahoo dot com

 

[Bushy]

Have not tried with AC but would probably work. Someone else may have more
experience and may post extra info.

There is a device called a reed relay that is a simple set of contacts in a
glass bulb that is often used inside a specialised coil. The reed relay
itself is only a couple of dollars for both parts and they are often
available separately.

The reed contact can be used in a coil of your own design, and a dozen turns
of one of the wires to your machine with about 15 amps should cause the reed
contacts to close. (Note I have only used this with DC but AC may work just
as well) The reed contacts can then be used to operate a larger relay that
can handle the current required for your dust collector.

As you can see I don't know for sure if this will operate with the Ac but
suspect it will. Be careful with your wiring. For the couple of bucks it
will cost to get a reed relay and the time to insert in a couple of turns of
the active supply line it might be a worthwhile experiment.

Hope this helps,
Peter

 

[Watson A.Name - "Watt Sun]

In article <boo2dl$aq2$1@bunyip.cc.uq.edu.au>, please@reply.to.group
mentioned...

Have not tried with AC but would probably work. Someone else may have more
experience and may post extra info.

There is a device called a reed relay that is a simple set of contacts in a
glass bulb that is often used inside a specialised coil. The reed relay
itself is only a couple of dollars for both parts and they are often
available separately.

The reed contact can be used in a coil of your own design, and a dozen turns
of one of the wires to your machine with about 15 amps should cause the reed
contacts to close. (Note I have only used this with DC but AC may work just
as well) The reed contacts can then be used to operate a larger relay that
can handle the current required for your dust collector.

As you can see I don't know for sure if this will operate with the Ac but
suspect it will. Be careful with your wiring. For the couple of bucks it
will cost to get a reed relay and the time to insert in a couple of turns of
the active supply line it might be a worthwhile experiment.

Problem is that the reed relay contacts are so light that they will
probably open and close 120 times a second, once for each half cycle
of the AC line. I don't know if they are rated for millions of
cycles, but this would be a good way to find out!

Hope this helps,
Peter

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
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@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@

 

[Jeff]

I saw a shop set up like this a long time ago - the main feed for the
machine breaker box panel had a little current transformer on it. A hall
effect sensor would also work.


"Jim Thompson" <invalid@invalid.invalid> wrote in message
news:a9ntqvsg77vtudh6b0sc8v5s6tnr3cschm@4ax.com...

On 9 Nov 2003 16:31:49 -0800, bigcat@meeow.co.uk (N. Thornton) wrote:

j <j@nospam.yea> wrote in message
news:<Vqvrb.19754$9M3.1954@newsread2.news.atl.earthlink.net>...

Sorry for the cross posting, wasn't sure where to put this. I am a
woodworker and I have a table saw and a dust collector the saw is
220volts and the collector is 110volts. When I turn the saw on I want
the dust colector to automaticaly come on.

I don't think that it can be very difficult. can someone point me in
the
right direction to start figuring outhow to make one that is more
flexable?

A current relay in the supply to the power tool can switch your 110v
when tool is powered. A small number of turns of thick wire on a
standard relay would do it, long as its contacts are suitably rated.


Regards, NT

Pondering my navel here... I wonder if you couldn't drive a
low-voltage relay via a current transformer? That would save you
having to try to put a winding on a relay bobbin that you probably
can't get your fingers into.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[GPG]

220 V AC relay on tool motor wires. Contacts to switch dust collector.