3 way latching swich

[CataM]

You can limit voltage across the motor by adding a resistor in series. The thing is that build up 12 V supply implies additional cost.

 

[Englewood]

Okay, so I have made the circuit on breadboard. (Got a couple of relays )

The open door switch starts the relay which turns the motor in one direction and hits the laser switch and turns the laser on and the motor stops. (Okay here)

The door switch is then closed which starts the relay which turns the motor in the opposite direction and the laser goes off but is being dragged down and parts get very hot!.

- - - Updated - - -

Image of my parts.


Its now working how I want it too work but the motor is pulled down a lot and gets hot at times

I'm not sure if my relay is wired up correctly, ive used 2 of these for the moment.

https://www.schukat.com/schukat/sch...11&refDoc=CMSDAD9057DF9FBACE3C125708A004D3703

and ive just put the switch and motor to either side of the coil

 

[Englewood]

As you may tell my relay knowledge is poor.

Still learning, hopefully I will get this working when I get back from working abroad!!.

 

[wdmsystem]

Hope the following link helps.
http://www.fs.com/c/optical-switches_628

 

[Englewood]

Worked out the relay finally and working . Cheers guys

Got another issue, can you get a double ended latching push button switch?

So when the switch is pressed one end it stays on and when pressed the other it goes off, visa vera

 

[Warpspeed]

Only thing I can think of that does something like that might be a slider switch.

Slide it one way for on, slide it the other way for off.

 

[Englewood]

That's all I could find too :-(. Might have to have a redesign.

 

[CataM]

So when the switch is pressed one end it stays on and when pressed the other it goes off, visa vera

It sounds like a Stop-Run mechanism. But that involves 2 push buttons and 1 relay.

 

[Englewood]

It sounds like a Stop-Run mechanism. But that involves 2 push buttons and 1 relay.

Yeah I could do it that way. :grin:

 

[CataM]

Want a schematic?

 

[Englewood]

I know what you mean, if you don't mind, then ill know if we mean the same thing

 

[Warpspeed]

Confucius say:
"schematic worth thousand words".

 

[CataM]

Confucius say:
"schematic worth thousand words".

:grin: The engineering part of Confucius.

 

[CataM]

KM is a relay. When energized, it closes the contact normally opened associated with it also called KM.

 

[Englewood]

I cant get the motor to turn backwards when the first switch is in the second position



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Is the coil the BOX on your schematic of a thousand words

 

[CataM]

I am not used to the simulator you use so I do not know in what state are your push buttons normally (opened or closed ? ).

To turn the motor the other way around, you can use schematic provided by Wasperpeed on some above posts.

 

[Englewood]

Ive figured it all out but only with help from you guys .

Works as I want it too but now breadboard time!!!.

Wish me luck haha

 

[Englewood]

Can you get a small 6 pole relay?, been looking cant fine one