Laser-cut Mechanical Claw

If you are worrying about what kind of trick want to show for Halloween this year, or your kids are asking for toys from you, this instructables may help you: to make a movable mechanical claws, the joint of the claws are movable, and its movement are the extension from your finger movement. you can use it to take cool poses, selfie, scratching, picking nose, or give your friends a hand haha... okay, I know that's not funny.

anyway, you may see some projects on instructables and youtube with similiar mechanism and which are awesome, but it maybe hard to replicate one of those. In order to let anyone can make one, we keep material lists simple, and with a lot of picture to help you assembling.

To complete this projects you needs:

  • 3 mm MDF board L 600 mm, H 450 mm
  • A bunch of rubber band (at least 15)
  • Fishing line

    Tools:

  • Laser cutter - find nearby Makerspace/Fablab
  • Hammer

    Time:

  • 20-30 mins for laser cutting (depends on the laser cutter you use)
  • 1-3 hrs for assembling

    Ok, so let's get started!

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  • 3 mm ???(MDF board) ? 600 mm * ? 450 mm
  • ????? (?????)
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  • ????? -??????Makerspace / Fablab ??
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  • ????: ?20~30 mins (??????????)
  • ????: 1~3 Hrs

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    Step 1: Cut the file ???????

    Laser-cut Mechanical Claw

    The claws is designed by inkscape, an powerful illustrating software, if you want to modified the file please use the .svg file attached above and editing it in inkscape, but if you simply want to enjoy building the claws, the prepared .pdf file is recommended, noticed that the import .svg file generate from inkscape to other software like Illustrator may generate some problem like changed dimension, so if you do so please check the dimesion or other setting as you cut.

    Also, you need to find a place to cut it out, there are a bunch of spaces could help you to do that, for our example, we are fortunate enough to have the place like Fablab Taipei. In fact, the entire designing and prototyping process is done and supported by fablab. we shared it and want to see how you gonna play with it!

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    Laser-cut Mechanical Claw
    M_Claw.svg247 KB
    Laser-cut Mechanical Claw
    M_Claw.pdf96 KB

    Step 2: Fingers ??????

    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
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    Laser-cut Mechanical Claw
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    Laser-cut Mechanical Claw
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    There are a lot of little parts for the fingers, and honestly speaking, the assemble process is a little bit complicate - which are the result of under concept of using the most of laser cutter, otherwise, it should be good as well to use some wooden rod as the joint.

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    Step 3: Palm ?????

    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
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    Laser-cut Mechanical Claw
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    The parts is simpler than fingers, if you find it hard to assemble some of the parts, please use wax to smooth the joints, or using the hammer to force it, SUDO!

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    Step 4: Combination ???????

    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw

    The only thing you need to notice, is that keep the finger bending forward as the normal hands do as you put the fingers into the slots, there is a spike in the middle slots of the finger which restrict the bending direction, you need to keep it on top when you assemble it.

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    Step 5: Finish it ????????

    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
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    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
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    The rubber band working like a tendon for the claws, it provide the pulling forces, as long as you hook the rubber band as the pictures, and put the fishing thread though the hole we designed, and choose a rings according to your fingers, we made it!

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    Step 6: Play it ??

    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw
    Laser-cut Mechanical Claw

    Now you can play it, modify it, improve it, and most of all, you have something to show your friends on halloween!

    Surely you can combine it with your awesome costume, my last year halloween costume - for you referecne.

    Alright, thanks again for browsing into my instructables, looking forward to see what you made!

    This projects is a group project design and modified by: Xintian, Mac Yu and Ted Hung.

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    This projects is a group project design and modified by: Xintian Chu, Mac Yu and Ted Hung, at Fablab Taipei.

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