using motor to open and close ventilation

[cimbri]

hi im new here and first i have to appologize for my english because is not my native language.

i need help with ventilation, however i do have thermostat which controls open and close and problem is i believe in the motor, (missing some circuit) when temp reach critical it start to open but when fully opened wont stop still spins and it is same with closing.
what i need when thermostat send signal to motor to open after he fully opened to stop(power) and same thing when cools off to close and stop

thanks

i hope you will be able to undestand what i need

 

[canadaelk]

What you need, I believe, is a limit switch. It senses mechanically th closed or open position ofyour vanes. E

 

[Boncuk]

Hi cimbri,

your circuit should be similar to the one attached. Limit switches interrupt motor ground connection if the max position in either direction has been reached.

Boncuk

 

[Jon Wilder]

Here ya go -

 

[cimbri]

thank

you verey much for quick reply

 

[Boncuk]

you verey much for quick reply

Sorry, I mixed the signal nets for the limit switches. The L/H switch is max closed and the R/H limit switch is for max open.

So the switches must close diagonally for operation.

Boncuk