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The Gear Claw

Discussion in 'Gear/Lever Systems' started by kram242, Jan 28, 2009.

  1. kram242

    kram242 Administrator Staff Member

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    This is a project I started when I saw a video with this machine in it.
    I thought hey I can make that. So I did and it works :D

    Right now I am using a motor from one of those Christmas deer that move their heads up and down, but I think it would be nice to have it move a little faster with a different motor, so that you can see the claw action better.
    I used hot-glue and bamboo for the axles just blobbed a little glue on the ends to keep the parts in place.





    I cut this out using a 1/16" end mill and that is what the code is setup of course you could scale it up and cut it with 1/8th bit as well.
    Here is the file



    Enjoy

    EDIT Here is the SketchUp plugin I used to make the gears Attached files [​IMG] GearClaw.wmv (2.9 MB)Â GearClaw.zip (528.8 KB)Â [​IMG] gear3.rb (7.7 KB)Â
     
  2. rcav8r

    rcav8r Moderator Staff Member

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    The possibilities really are endless, aren't they? :D
     
  3. kram242

    kram242 Administrator Staff Member

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    Only limited to the imagination :)
     
  4. kyyu

    kyyu Active Member

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    Mark, is there a plug-in you use to draw the gears?
     
  5. kram242

    kram242 Administrator Staff Member

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    Oh yeah sorry about that I did find a plug in for that.
    Here you go. I will add it to the Other SketchUp plugins thread as well.
    Attached files gear3.rb (7.7 KB)Â
     
  6. kyyu

    kyyu Active Member

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    Thanks Mark, I hope to make some motorized gadgets like this in the future.
     
  7. WW8S

    WW8S Member

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    That gear script is cheating! I just spent a dozen hours figuring out how to draw involute curves. It's interesting that it doesn't use the tooth pitch as an input parameter. But, I guess if you are drawing gears, you probably already know what kind of things to watch out for.
    Dave
     
  8. 7up

    7up Moderator Staff Member

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    Mark, when you have the time please explain you method of creating a gear using this script.

    Thanks
     
  9. kram242

    kram242 Administrator Staff Member

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    believe me I was happy to find that one too, after attempting to trace by hand :)
     
  10. kram242

    kram242 Administrator Staff Member

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    7up, here's a short video I made explaining how I used the script to create the gears for the claw
    Hope it helps
    Mark


    NOTE* You may have to right click on the video link and save it to your computer for it to work, I am having some problems with embedding these videos at the moment. Attached files gearclawtutorial.wmv (2.1 MB)Â
     
  11. 7up

    7up Moderator Staff Member

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    Hmmmm, I try the parameters you mention in the video and all I get is shown in pic 1. I try the default parameters and get what's in pic 2.

    I get the same results in both SU-6 and SU-7. I really like this script and have some cool ideas if I could get it to work.

    Anybody have any ideas? Attached files [​IMG] [​IMG] [​IMG]
     
  12. kram242

    kram242 Administrator Staff Member

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    That is weird!. Are you looking straight down or zoomed out? I have never seen that before.
    Maybe the file I uploaded is corrupt?
    Can someone else try this script out and let us know if it works for them?
    Thanks
    Mark
     
  13. 7up

    7up Moderator Staff Member

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    I am looking straight down "Top View" and I googled the script and d/l from another site and got the same results so I just stuck the the script you have posted back in my plugins.

    Its got me scratching my head. That is why I asked you to demonstrate. I thought I was doing something wrong...
     
  14. kram242

    kram242 Administrator Staff Member

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    Me too.
     
  15. WW8S

    WW8S Member

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    It works fine for me. I don't see any problems creating just about any gear. It will even do a 2 tooth gear! (has an odd through hole shape though)
    Dave
     
  16. 7up

    7up Moderator Staff Member

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    I got my problem solved. One of my other plugins was conflicting with the gear plugin. Not sure which one I just trashed a bunch that I seldom used and that done the trick.

    Maybe this will help in the future when plugin trouble appears again.

    Removing old unused plugins also cleared up some issues I was having with the PhlatscripT. I thought it was bugs in the script but it was conflicting plugins. Knowing this I will now test all new PhlatscripT updates with a clean SU plugin folder.
     
  17. kram242

    kram242 Administrator Staff Member

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    "Maybe this will help in the future when plugin trouble appears again."

    Great tip!, I have a ton of scripts I am always testing so this might also be an issue with me.
    I am going to have to run a clean plug ins folder for testing the new release from now on.
    Thanks 7up
    Mark
     
  18. 1fatdog

    1fatdog New Member

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    how do you get it to load in plugins? i downloaded an loaded the unfold tool successfully earlier (whitch is totally awsome :D :p :p :p) but i dont se the gears plugin (downloaded from two pages here. any help on what im missin'?
     
  19. 3DMON

    3DMON Moderator Staff Member

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    Look under the draw tab in Sketchup. Thats where mine shows up.
     
  20. 1fatdog

    1fatdog New Member

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    Awsome that's where it was. I figured it would be something simple. thanks for the reply... :D
     
  21. cemal

    cemal New Member

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    fantasic. love it.
    i wonder if your could add it to the useless machine idea.

    thanks for the gear plugin. :)

    can you tell me how to work out how far to place two gears. ie where do the gears touch.
     
  22. kram242

    kram242 Administrator Staff Member

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    Hi Cemal,

    Absolutely :D

    You can check out the gear claw tutorial video at about 1:16 to get and idea how I did the spacing. I really just made sure there was a little gap between the two so that it would run smooth with out being to tight or lose. I think around 1/16 to a light 1/8th inch.Really just as long as the gears are meshed you should be good.
    Mark and Trish
     

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