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Thread: LIDAR-lite 360 Mirror Scanner

  1. Re: LIDAR-lite 360 Mirror Scanner

    Quote Originally Posted by jwatte View Post
    Right -- you'd spin the whole mirror/post setup, using a lazy Susan type bearing (or slip ring.)
    Apparently, the "nicer" lazy Susan bearings are called "slew bearings."
    Yes, like this one:

    Click image for larger version. 

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    It's a full ceramic bearing, so it should be quite light, and REALLY smooth, with an internal diameter of 60mm which should be plenty wide for the LIDAR Lite. They do tend to get rather pricey, though. This one is US$400. Not really sure how you'd attach anything though. LOL.

    I found it here.

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    Re: LIDAR-lite 360 Mirror Scanner

    Quote Originally Posted by tigakub View Post
    I've actually been knocking this idea around in my head for the past week, too. Here's a crude (really crude) mock up to illustrate what I'm thinking:

    Attachment 6035

    Or maybe a belt instead of gears?
    Very nice! Thank you this helps a lot

    And look what I found.. http://www.trossenrobotics.com/120mm_bearing There is a 140mm version too. Much cheaper than $400 and has the ability to attach a mirror pretty easily. I think I'm going to order one today! :: Ordered
    Last edited by r3n33; 06-15-2015 at 10:57 AM.
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  3. Re: LIDAR-lite 360 Mirror Scanner

    Quote Originally Posted by r3n33 View Post
    Very nice! Thank you this helps a lot

    And look what I found.. http://www.trossenrobotics.com/120mm_bearing There is a 140mm version too. Much cheaper than $400 and has the ability to attach a mirror pretty easily. I think I'm going to order one today! :: Ordered
    Excellent! I didn't think to look closer to home. Lol, I want one now.

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    Re: LIDAR-lite 360 Mirror Scanner

    Quote Originally Posted by tigakub View Post
    Excellent! I didn't think to look closer to home. Lol, I want one now.
    Neither did I but google is my friend and put the Trossen result nice and close to the top for me =) After doing a little modeling of your suggestion I decided to get the 140mm version. There were not a lot of dimension/specifications given on the bearing so I wanted to play it safe. I didn't want to end up with something too small that I couldn't use.
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    Re: LIDAR-lite 360 Mirror Scanner

    Well thanks to everyone's input I've put together "model B" and I'm really happy with the results. I wasn't going for looks here.. Just wanted a quick test. The base isn't as sturdy as I'd like and doesn't house the electronics or anything fancy. Yet?
    I used the 140mm bearing from Trossen and reused the motor and mirror. The mirror holder used was the quickest thing I could model because I was anxious to start testing and just holds the mirror with (strong) double sided tape.

    Thanks again everybody for the help

    So here is the model as it turnd out:

    Click image for larger version. 

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    The printed and assembled parts (slightly different looks [taller base posts, upside down gear] due to revised parts):

    Click image for larger version. 

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    And here is a video of it in action doing a pretty fast scan:

    Last edited by r3n33; 06-21-2015 at 12:50 AM.
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    Re: LIDAR-lite 360 Mirror Scanner

    That is awesome. Totally awesome.

  7. #17

    Re: LIDAR-lite 360 Mirror Scanner

    Looks great. It is amazing how quickly you an take an idea like that and come up with a working version!

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    Re: LIDAR-lite 360 Mirror Scanner

    That's more like it! Great work, I'm also impressed of your skills and your fast prototyping.
    Awesome!
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  9. #19

    Re: LIDAR-lite 360 Mirror Scanner

    A belt has less backlash but more risk of slip. Seems easier to get to run smoothly and quietly, though.

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    Re: LIDAR-lite 360 Mirror Scanner

    Thank you, thank you, and thank you

    Once I had the picture in my mind putting together the parts was a fairly easy process. Regardless of the relative difficulty of the tasks such praise from you all is very much appreciated. This was a fun mini-project that taught me a few things along the way and resulted in a base system in which I can perform experiments. There are some little things I'd like to do to improve the design but I'm not expecting to have to disassemble mine any time soon so if anyone wants the 3D models or Sketchup source let me know please.

    Now I'm off to figure out what I'll do with this thing plus play with scan rates, different ranges, data smoothing, considering ROS , etc.
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