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Problem: How can i connect 2 switches to 1 motor without burning it?

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did the last picture make sense, our posts are passing each other while we type
Nop, kinarfi, i still don't get it lol.

I don't know what's the piece used on Start and Stop, is that a relay?

What can i use to make the 30 seconds timer?

I'm afraid i still don't understand your schematic, it looks logical, but i don't understand it. D:
 
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the set up is interlocked so if you push up and dn at the same time, only one will work because it is electrically interlocked, first one closed wins and the stop button over rides the starts button. all the contact are drawn in their natural state, as you hold them in you hand with no power, I assume you need a timer because the shutters do not have any have any end of travel switches, if you do, you don't need a timer. The start and stop buttons are momentary, the contact in parallel with start buttons is called hold in contact so you can release the button and the relay stays pulled in.
Let me know if you have more question, depending on the size of you shutters, a 4 pole ice cube relay should handle every thing, or you may need 3 pole relay and a heavier relay for the motor here some examples **broken link removed**
CHANGE DRAWINGS TO MORE CONVENTIONAL SET UP PLUS EXPLANATION
 

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Hi,

Watching with interest.

Fluence,

I am not sure about the timer thing.
What if the shutters have reached the end before the timer cuts it off.

Will it jam up?
Is there a friction drive?

I think limit switches would be more suitable.

However the arrangement suggested by 'Kinarfi' looks Ok,
and the three wire for swithing,
is similar to how i was thinking,
but not the same.

I was thinking of four wires,
one for up,
one for down,
one for stop,
and one for common.

I still think that limit switches would be the way to go.
I cant see that any timer is going to get it right.

Maybe just close is good enough,
and a person can pull the shutter the last bit,
to fasten it ?
Like that a timer might be Ok.

Regards, John :)
 
redid the schematic, again
 

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