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PiCasso Design Challenge
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PiCasso Design Challenge
Blog PiCasso Design Challenge - POV Globe Blog 4
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Engagement
  • Author Author: dwinhold
  • Date Created: 12 Apr 2019 12:38 AM Date Created
  • Views 808 views
  • Likes 10 likes
  • Comments 7 comments
  • bearings
  • pov globe
  • picasso design challenge
  • dwinhold
  • power transfer
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PiCasso Design Challenge - POV Globe Blog 4

dwinhold
dwinhold
12 Apr 2019

Welcome to my 4th Blog of the POV Globe. The subject of this update isn't what I has planned on, it was to be about hooking up the motor and get the globe turning. Unfortunately the motor I have isn't powerful enough to get up to the speed I require. I will have to source out a stronger and faster motor for my next blog. This is just a very minor setback.

 

So this blog is about how I am getting the power to the Raspberry Pi and the LED's. Like I said in my last blog, I was wanting to run te power through a bearing. I had been given a great idea to use a slip ring by genebren and e14phil. Philippe mentioned about using an audio jack as a power transfer. I am still stuck on my original idea of using the bearings. I have attached a video below to prove that the bearings work. I ran power to the outer ring of the bearing and continued it from the inner ring to the positive wire of a fan. The negative is not ran through a bearing as I did a small mockup of the bigger picture. It works great and will be incorporated in my project.

 

Below is a video of the working model:

 

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Hope you enjoyed this update, next week should be the motor working.......

 

Dale Winhold

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Top Comments

  • ralphjy
    ralphjy over 6 years ago +5
    Nice to see it working. I have a stepper driven turntable that I built a while ago to try 3D scanning. I can probably come up with a new use for it if I can get power onto the turntable. I was thinking…
  • fmilburn
    fmilburn over 6 years ago +4
    Hi Dale Very innovative! Have you put an oscilloscope on it to see if there are hiccups that might bother the Pi? It seems to work quite well with the motor. Frank
  • balearicdynamics
    balearicdynamics over 6 years ago +3
    Just thinking about the solution, I see some serious potential issues using a power jack due to the speed you should reach with the globe. Instead, did you considered a couple of contact brush to transmit…
  • e14phil
    e14phil over 6 years ago

    I have never seen it work this well, Looks awesome Dale.

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  • ralphjy
    ralphjy over 6 years ago

    Nice to see it working.  I have a stepper driven turntable that I built a while ago to try 3D scanning.  I can probably come up with a new use for it if I can get power onto the turntable.  I was thinking of adding a slip ring like Gene used, but I guess I could also add an inner bearing and try your technique.  I'll need to dig it out of storage and measure the resistance of the  "lazy susan" bearing that I used.

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  • dwinhold
    dwinhold over 6 years ago in reply to fmilburn

    Hi Frank

    My next step is checking out the power with an oscilloscope, make sure there won't be any issues.

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  • dougw
    dougw over 6 years ago

    It might be feasible to look at wireless power transfer:

    The KLINGMAGON Subspace Probe

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  • balearicdynamics
    balearicdynamics over 6 years ago

    Just thinking about the solution, I see some serious potential issues using a power jack due to the speed you should reach with the globe. Instead, did you considered a couple of contact brush to transmit the power to the rotation? Maybe a copper ring and a fixed rotating wheel for every pole. And what about a coaxial motor?

     

    Enrico

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