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Thread: Dumb question, not "robot" related but robotics component related.

  1. Dumb question, not "robot" related but robotics component related.

    Hi everyone. My name's Lawrence.
    I have a question related to robotics components. The reason I'm coming here is because I used to hang out with some dudes who were into Robotics; they could basically make anything to accomplish any task. I know you dudes are all pretty much engineering geniuses, so perhaps you can help.

    I'm into luthiery/guitar building and repair.
    One thing I find myself regularly needing is some sort of small, remotely actuated internal 'jack' that I can use to raise collapsed archtops, support reglued braces, etc. I come to find out that a company already makes a product for that task but man, they're charging a lot for what amounts to a small, hand-cranked scissor jack. I imagine I could build something at least as good for cheaper, for for the same cost but better.

    Here's the link to what I'm talking about.
    http://www.stewmac.com/shop/Tools/Sp...ssor_Jack.html

    What I need is to figure out what standard, off the shelf robotics components could be used to achieve that same, basic task. Basically, the idea is a simple, small, remotely actuated jack.

    Anyone have any ideas?

    Thanks.

    LT

  2. Re: Dumb question, not "robot" related but robotics component related.

    Crap. Posted this in the wrong forum. Meant to post it in general. If a mod could move it, it would be appreciated.

    Sorry. Dumb new guy

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    Re: Dumb question, not "robot" related but robotics component related.

    Jack style lift like the one you posted is extremly strong for its size. Making something comparable out of motors and then fabricating a frame for it will most likely cost 2X-3X as much.
    You actually need a pretty strong motor/actuator for something like this. And size is an issue here.

    But if you want to build something your self a custom setup. Hydraulic/air type system would work best in this case, small cylinders and with manifolds and seperate controls your not limited to how many you can have.
    This would be costly.

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    Re: Dumb question, not "robot" related but robotics component related.

    Using a flexible shaft is probably the cheapest way to do that task, and unless there were major upsides to having a remotely controlled motor that does the jacking (Which I don't think you'd want, because you wouldnt be able to "feel" how tight it is). I'd say your best bet is mimicking their design. You could probably make one for a bit cheaper, but much more time consuming.

  5. Re: Dumb question, not "robot" related but robotics component related.

    OK, so electromechanicals are out.

    Can anyone think of off-the-shelf components (gears/linkages/screws) that might allow me to use some sort of sideset thumbscrew to create a vertical jacking action? I actually have a full Taig micro lathe/mill setup, but I'm away from it right now, so I'm trying to keep it standardized.

    Elegance and stupid-simplicity are OK.
    Last edited by DomoArigato; 09-09-2011 at 09:20 PM.

  6. Re: Dumb question, not "robot" related but robotics component related.

    Think a Machinist jack, but with some sort of side-control.

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    Re: Dumb question, not "robot" related but robotics component related.

    Hi Domo,

    How about an alternative? You could use a bicycle pump - similar to this one, for under $10 to $20. I selected a foot operated pump with a gauge and valve-stem lever; might be able to utilize the lever in maintaining pressure <shrugs>. Just need to make a suitable bladder to inflate inside whatever you're working on.

    Regards

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    Re: Dumb question, not "robot" related but robotics component related.

    Your not going to find a 5 dollar solution. Just buy the jack and call it a day.

    Really think about the amount of stress involved.

    I'll leave you with this.
    When you work on your car do you use a tire pump to raise your car?

    No its a screw type device since its able to handle the force needed!
    Last edited by Quantum; 09-10-2011 at 03:07 AM.

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    Re: Dumb question, not "robot" related but robotics component related.


    http://www.youtube.com/watch?v=bBuv7...layer_embedded

    @Quantum: Think. You know better. Unless you've never heard of an air jack or air brakes, which I seriously doubt you're that uninformed.

    You can just as easily over torque a screw/scissor jack as over inflate a bladder. I'm not into sensationalism so I'm not going to post any links, but just doing a search on "tire explosion kill" will find numerous links on just how powerful - and, unfortunately, deadly - air pressure can be.

    Regards

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    Re: Dumb question, not "robot" related but robotics component related.

    Stobs the guy is trying to make something under 90 bucks.

    I agree with you point on over torque things.

    He wants the most control possible and force needed. Jack fits the solution.

    A bladder is sloppy as you cant control the point your expanding as a jack can.
    Last edited by Quantum; 09-10-2011 at 07:28 PM.

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