Currently I am trying to rotate a piece of steel >90 degrees without any power input. The piece of steel is attached on the wall. A servo is also attached on the steel.

This question addresses turning the piece of steel if the servo fails to work. A battery is not supposed to be used. Generally like a servo may do it with power the rotation should be performed without power whilst in this case the rotation has to take place only once. The trigger is a toggle switch that will drop,if pushed, a weight on the right side (see picture) in order to rotate the piece of steel. This rotation has only to be performed once. Doing this currently the required rotation >90 degree does not take place.

The remaining questions are:

  1. Where has the weight to tip the steel ideally so that the piece of steel can be moved/rotated with the least amount of force? I was thinking that the edge of on the right side of the steel would be most beneficial location to tip with the weight. Am I right?
  2. What weight must ‘the object’ be in order to move a 8cm x 2cm x 4cm piece of steel >90 degrees. Hereby I have to know the required force on the steel in order to rotate it.

Do I think too naively and have any mistake on my thoughts?

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closed as unclear what you're asking by Wasabi, Algo, Nick Alexeev, Trevor Archibald Sep 23 '15 at 19:15

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ are you allowed to use gravity as a power source? $\endgroup$ – ratchet freak Sep 23 '15 at 16:42
  • $\begingroup$ @ratchet freak yes I am $\endgroup$ – Sathees Sep 23 '15 at 16:43
  • $\begingroup$ Is there some sort of input mechanism to tell the piece when to rotate (a button or something)? When should it rotate? $\endgroup$ – Wasabi Sep 23 '15 at 17:04
  • $\begingroup$ The trigger is not determined yet..so therefore free to design...I was thinking of a button as well. As long as it may work without any power a button can be utilized $\endgroup$ – Sathees Sep 23 '15 at 17:07
  • $\begingroup$ I'm putting this on hold as it essentially asks us to design your solution for you. I suggest you narrow the scope of the question once you have identified a potential design either on your own or through other means such as our chatroom. For example, determining the weight you would need to tip the steel with a certain type of movement would be on-topic, provided you could show the design and point to a variable in it you needed to determine. $\endgroup$ – Trevor Archibald Sep 23 '15 at 19:24