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BOE-BOT 10 inch Round Platform. I live in Australia. — Parallax Forums

BOE-BOT 10 inch Round Platform. I live in Australia.

EzsynnEzsynn Posts: 119
edited 2009-01-30 20:38 in Robotics
The idea of using Acrylic Plastic failed because it chips easily and it is heavy What else Could I use? I don't want to use Plywood because of the weight.
Is there any no conductive material to make a strong round Platform?
And does anyone have any designs on contact touch sensors that fit on the edge of the platform?
Any Ideas? smilewinkgrin.gif

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BWIN ON DA POWAH WIFIN U!!!

Post Edited (Ezsynn) : 1/31/2009 5:06:41 AM GMT

Comments

  • ZootZoot Posts: 2,227
    edited 2009-01-29 13:45
    Lexan, Delrin.... also any hobby shop or Michael's or Hobby Lobby will have model aircraft plywood -- which comes in 4"x12" sheets (or so) in thicknesses from 3/8" or so down to very very thin. Very light, easy to work.

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    When the going gets weird, the weird turn pro. -- HST

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  • kwinnkwinn Posts: 8,697
    edited 2009-01-29 14:28
    A one inch thick sheet of foam insulation with a thin sheet of plastic or wood glued (with silicone sealant) to the top and bottom makes a very light rigid structure, and is non conductive. I have used it with a wood door skin, sheet lexan, and arborite as top and bottom laminations.
  • UghaUgha Posts: 543
    edited 2009-01-29 14:34
    Expanded PVC is good as well.

    The weight was too high for the servos I presume?

    If that's the case, you can always use different servos or motors.
  • WhitWhit Posts: 4,191
    edited 2009-01-29 17:07
    Expanded PVC is also called Sintra (brand name, I think). Check it out here - http://www.solarbotics.com/construction_materials/

    Also at craft stores they have craft plywood. Small pieces in diffent thicknesses. I think it would work well too.

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Steph LindsaySteph Lindsay Posts: 767
    edited 2009-01-29 17:58
    Hi Ezsynn,

    The book Robot Programmer's Bonanza has a modified Boe-Bot on the cover with a round base.· The base is ringed by an ingenious DIY contact sensor.

    This book is about the free RobotBASIC simulation software, which is great fun to play with, and has an entire chapter on porting your simulator-developed sensor algorithms to a real Boe-Bot with Parallax sensors.· The directions for making the contact sensor bumper-skirt are in that chapter.

    -Stephanie Lindsay

    Editor, Parallax ZInc.
  • kwinnkwinn Posts: 8,697
    edited 2009-01-29 18:38
    Couldn't tell from the picture on the Robot Programmers Bonanza books cover what kind of sensor that was around the base, but the requirement for a sensor around the entire base was how I came up with the styrofoam/wood laminate base in the first place. I bought a bicycle inner tube and built the base to fit the center of the tube, removed the valve innards, and connected it to a pressure switch so no matter where the tube was contacted the switch closed. Had to modify it slightly later so air could be pumped in to re-inflate the tube occasionally. Oh well, you rarely get it perfect the first time.
  • P!-RoP!-Ro Posts: 1,189
    edited 2009-01-30 01:03
    You can find 8" round bases here:

    http://www.budgetrobotics.com/shop/?cart=730188&cat=5&

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    PG
  • GWJaxGWJax Posts: 267
    edited 2009-01-30 01:14
    Ezsynn said...
    The idea of using Acrylic Plastic failed because it chips easily and it is heavy What else Could I use? I don't want to use Plywood because of the weight.
    Is there any no conductive material to make a strong round Platform?
    And does anyone have any designs on contact touch sensors that fit on the edge of the platform?
    Any Ideas? smilewinkgrin.gif

    Ezsynn, a little FYI for you, when cutting Acrylic you must use a 6T blade, This will help so you don't chip or crack the plastic even Lexan you would use this blade as well.
    If weight is your concern, use very thin acrylic and brace it off with aluminum 90' corner rods or use what the guys posted above.

    Jax

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    If a robot has a screw then it must be romoved and hacked into..

    Post Edited (GWJax) : 1/30/2009 1:21:08 AM GMT
  • EzsynnEzsynn Posts: 119
    edited 2009-01-30 20:38
    Steph Lindsay (Parallax) said...
    Hi Ezsynn,

    The book Robot Programmer's Bonanza has a modified Boe-Bot on the cover with a round base. The base is ringed by an ingenious DIY contact sensor.

    This book is about the free RobotBASIC simulation software, which is great fun to play with, and has an entire chapter on porting your simulator-developed sensor algorithms to a real Boe-Bot with Parallax sensors. The directions for making the contact sensor bumper-skirt are in that chapter.

    -Stephanie Lindsay

    Editor, Parallax ZInc.

    Yo, I already know that cause I've got the book. I was going to make it until I saw the budget and the book had no instructions on how to build it so, I might as well design my own.

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    BWIN ON DA POWAH WIFIN U!!!
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