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  • yellowsubmarine

    yellowsubmarine

    MemberDec 3, 2011

    Need help regarding building a mechanical robot

    Hello,
    The task that this robot is supposed to perform is: It has to carry some balls and move from the starting line to the finish line, drop the balls there and come back..All without use of any battery. Only by the use of mechanical potential energy(gravitational and elastic).
    Here is my idea. I want you to tell me if it is feasible, economical and executable. Or whether I'm idealising things too much..

    A mass kept at a height will fall and this is connected to a pulley. Thus, a string is pulled and this string is connected to the axle of the wheel of the robot. Thus the wheel turns and the robot moves forward. The mass falls on one side of a see-saw and the other side contains the box of balls. It will tilt( it is hinged) and all the balls will fall. For the coming back part, I want to use a torsional spring which has already stored energy and upon reaching the finish line, it gets activated and forces the robot to move in the opposite direction.

    Please give me suggestions, criticisms. Anything will do.
    Thank you, in advance.

    YellowSubmarine.
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Replies
  • Kaustubh Katdare

    AdministratorDec 4, 2011

    Thread moved to CE Robotics section 😀
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  • yellowsubmarine

    MemberDec 5, 2011

    Please reply, people...
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  • Ramani Aswath

    MemberDec 5, 2011

    Try something on these lines. The trolley can be at the top of an inclined track. This is kept here by a weight (just more than the trolley weight on the inclined plane) at the end of a string passing over a pulley at the track end and attached to the trolley. The trolley has a bin with a sideways sloping bottom with a door on the lower edge of the slope held by a latch and hinged along the top edge.
    Load the Balls on the trolley. The additional weight of the balls will make the trolley go down the track.

    When it reaches the bottom a trigger or pin lifts the latch, the balls slide down and out sideways pushing the top hinged door open. The trolley reverses by the now raised counterweight coming down. Once the trolley reaches the top position the door can be latched and the next cycle started.
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  • yellowsubmarine

    MemberDec 7, 2011

    Ok, Sir, thank you.
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  • jobinvcm

    MemberDec 17, 2011

    got a small problem are you intending it to be fully automatic.
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  • yellowsubmarine

    MemberDec 19, 2011

    Yeah. I'm not allowed to touch the thing after triggering it at the start.
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  • yellowsubmarine

    MemberJan 2, 2012

    Can you please tell me how to fix an axle to the L-clamp(which is fixed to the chassis), such that it is able to rotate, but not move sideways?
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  • Ramani Aswath

    MemberJan 2, 2012

    yellowsubmarine
    Can you please tell me how to fix an axle to the L-clamp(which is fixed to the chassis), such that it is able to rotate, but not move sideways?
    I am not quite sure if this is what you are loooking for.
    Try using a stepped axle with the central portion having a diameter larger than the hole in the clamp. The length of this portion will be the distance between the holes in the clamp minus the thickness of two washers and a small clearance to allow free rotation without much lateral play.
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