Im doing a project in which a certain lid has to automatically close when the power goes out , I am well aware that this issue can be resolved using backup power battery or super capacitors but I want a more simpler approach , what I thought was that if we put a counter weight at the other end of the lid when the light goes out the servo motor will go to rest position along with the weight due to counter weight but for that I need detent torque of servo so that i can make the counter weight equal to detent torque . Ive done my research and as it appears that no servo data sheet has detent torque specification especially the ones that can handle 10kg/cm torque . The issue is that servo motors do have torque when they are not energized and that is certainly appears as the detent torque so how do i calculate this detent torque for any servo .
Also im well aware that using stepper motor can resolve this issue but for a certain reason i want to use servo motor .
You will have to define for me what "detent torque" is. In the meantime, how hot does your servo get while it is holding the lid open for a long period of time?
Paul
DustSky00:
a certain lid has to automatically close when the power goes out ,
Hold the lid in position with a clutch. When power fails the clutch releases and the counterweight pulls the lid closed.
Servos are designed to move and hold things when powered. They are not intended to hold things against external forces when unpowered. That's probably why they don't publish any figures for the torque required.
Steve