Hello

This is my first post, so be nice!

Im building a replacement for a valve on a radiator, with bluetooth and the like.

Im not sure the best way to go for the actual act of opening and closing the valve, my thinking is that the valve will have a cap that when tightened pushes the pin down and closes the valve.

So i started to research the best kind of motor to use, and im just lost! I need it to be able to turn CW and CCW on command, so my first thought was servos, but i think torque might be a problem.

Anyone done something similar in the past and could advise?

Any thoughts, or a better way to move the pin would be great.

Thanks.

 

I would go with a servo.

You could use a worm gear CW/CCW, attach a mount on the cap / spot weld, mount your worm gear assembly atop the mount your actuator ride along the worm gear back and forth which is connected to the lever with a spring, on one side of threaded stock and on the other side of the threaded stock is a roller to roll pressure atop the pull lever, holding it down, once down it resets to middle position, relaxing the spring.

 

There should be no problem with torque and servo's other than what?
It all depends on what the application demands.
It might be better to look into steppers as no feedback is required and the commands can be simple step/dir.
Something like this may work for you, there is another one similar on another site I visit.
http://bbs.homeshopmachinist.net/threads/60775-Stand-alone-Stepper-control-for-indexer
Max.