• Profile picture of anthony

    anthony posted an update 8 years ago

    Rachel & Marty, I hope they can understand themself soon 🙂
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    Before I can start with my complete InMoov, I need to upgrade my UM2 filament spool-holder.
    I’ve ordered some COLORFABB_XT spools with 2.2kg filament 🙂
    Not sure if XT filament is the right choice for some mechanical parts.
    • Profile picture of Mindless
      Mindless replied 8 years, 1 month ago

      yep… Colorfabb is great stuff, iv tried every brand/type out there ,, i do a lot of printing,,, In Australia i use “Blueprinted” filaments which is pretty good quality for a cheap filament Colorfabb is hard to get here and its bloody expensive..
      I only use PLA you would surprised how tough the stuff when printed correctly – you wont have any…[Read more]

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Thanks for your information.
        I get lucky to live in the Netherlands, the shipping costs are free when I order one spool.
        And with the 2.2kg spools it’s 30% less in price.

        I’m sure I need to play with some settings (temps and max speed).
        I hope to start this evening with some tests 🙂

        I’ve used CollorFabb PLA for some time now and this prints…[Read more]

        • Profile picture of Mindless
          Mindless replied 8 years, 1 month ago

          Its worth having a go at trying other other filaments but iv found you really cant beat good quality PLA when its printed correctly,, its hard so its good for gears and moving parts It prints like a dream compered to other filaments,,, and it doesn’t destroy the planet,,,
          I’v been R&D on 3d printers full-time for about 4 years now, mainly on d…[Read more]

          • Profile picture of Marten de Groot
            Marten de Groot replied 8 years, 1 month ago

            CollorFabb PLA is good material anyway.
            XT can handle a higher temp when it’s printed, this part is a positive thing if InMoof stays for a long day in sunlight.
            So maybe I will use XT for some outside parts and all others with PLA 🙂

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    The new printed shaft fits well and it looks that it can handle the rotation.
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    So, the new hexagonal shaft / Small_Gear and Servo_adapter files are uploaded 🙂
    http://www.thingiverse.com/thing:1824042
    I will test this soon and will share a video later this week.
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    Instead of a DogBone shaft, I’ve designed a new small Wrist_Gear and servo-adapter and will use a 6mm hexagonal shaft.
    I hope the 6mm hexagonal shaft is strong enough 🙂
    Tomorrow I will print all parts and if it works fine, I will include these parts to the Wrist upgrade set @ Thingiverse.



  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    I\’ve uploaded all Wrist upgrade files to Thingiverse:
    http://www.thingiverse.com/thing:1824042
    Enjoy… and don\’t forget to share your results 🙂

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    Today I received my new Lenovo Thinkpad 8,3″ and the DogBone shaft 🙂
    Later this day, I hope to finish the last things for the new Wrist DogBone shaft.
    (I need to change some small things to makethe DogBone shaft fit between the small Wrist gear and to the servo DogBone adapter)
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    I’ve connect all fishing lines to the fingers and the servo’s.
    All runs more freely and looks OK for me, here the test video with a complete Arm/Hand/Fingers:
    • Profile picture of Perry
      Perry replied 8 years, 1 month ago

      That is awesome. No tensioning spring is the best feature! I guess you could add a tension spring like you had in your single finger tutorial.
      I think this is pretty innovative which begs the question what does the rest of your bot look like?

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Hi Perry,
        Yes for sure I will include the springs which I’m using with my Finger_Starter kit.
        This makes programming a closed position more easy and they are to safe the servo mechanical way 🙂

        • Profile picture of Perry
          Perry replied 8 years, 1 month ago

          Sounds like it is time to follow you on Thingiverse 🙂

          • Profile picture of Marten de Groot
            Marten de Groot replied 8 years, 1 month ago

            🙂
            I think after this weekend I will upload all files, which are needed to upgrade the Wrist part and this includes the new ServoBed for the small servo’s and the Wrist servo.
            I can’t see that these smaller servo’s can hold it for a longer period 🙂
            But so far it looks good and including the springs I think it’s safe enough to use them!

    • Profile picture of Gael Langevin
      Gael Langevin replied 8 years, 1 month ago

      Very nice Marten!
      It’s very interesting to see how you managed the wrist servo, I guess we could add a second servo for wrist abduction. That would be a great extra feature. (Hand Mini breakout Nervo Boards and Nervo boards would need to be transformed and all scripts and gestures as well though…)
      Will you test it running continuously full 10…[Read more]

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    Finally the new ServoBed is done and fits very well.
    For now I’m using a 98mm DogBone drive shaft from a tamiya RC truck.
    Later, I will order this one:
    https://www.rcplanet.com/Associated_Dogbone_108mm_SC8_2e_RTR_p/asc89576.htm
    • Profile picture of rodolfo rojas
      rodolfo rojas replied 8 years, 1 month ago

      Very nice work. I’m waiting to see the fingers and wrist working together. Fantastic

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Thanks Rodolfo,
        Here a video from this complete setup:

        Tomorrow I will start to connect all the finger fishing-lines to the servo-pulley’s 🙂

        It looks good so far 😉

        • Profile picture of Perry
          Perry replied 8 years, 1 month ago

          Once again nice work. It would be great to have a printable shaft for the wrist as opposed to a dog bone. Just another part I would have to wait for when I want to try something late at night. I thought you had a different servo offset in your previous vid and didn’t need the universal joint functionality

          • Profile picture of Marten de Groot
            Marten de Groot replied 8 years, 1 month ago

            Thanks Perry,

            A printable shaft would be cool, I only think it’s not strong enough !
            And DogBone shafts are very basic parts which are used in RC cars.
            Most local dealers will selling them.

            About the servo, in the first test video I was using a “Low Profile” servo.
            For some reason, these servo’s will not run with a Arduino !
            For this reason I…[Read more]

          • Profile picture of Marten de Groot
            Marten de Groot replied 8 years, 1 month ago

            Check my last post, to see the full functional Arm/Hand/Fingers:

            I’ve connect all fishing lines to the fingers and the servo’s.All runs more freely and looks OK for me, here the test video with a complete Arm/Hand/Fingers:https://youtu.be/8xlMrEUZBTw[Read more]– Marten de Groot (@mdg_nl) October 7, 2016

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    The Servobed is updated, so tonight I can mount the Wrist servo and measure the distance between the small Wrist-Gear and the servo.
    To finish this Wrist update, I only need to print the servo link.
    Then it’s time to mount the Hand and all the fingers 🙂 (I can’t wait…)
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    I’ve decided to make new Wrist Gears to, so all the Finger-fishing lines are more in line with the servo’s !
    The Wrist servo will placed on the Finger servobed and with a axle it will be connected to the small Gear.
    When I’ve printed the Gears, I can start drawing the Servo part…
    Later I will share more pictures and if it works, I will share all…[Read more]

    • Profile picture of rodolfo rojas
      rodolfo rojas replied 8 years, 1 month ago

      I wish that works, it’s a great Idea

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Haha, my fingers are crossed 🙂

        The Wrist servo is blocking the complete way for all fishing-lines.
        With the servo placed on the servobed, it makes it full open.
        So this saves a lot of friction 🙂

        (printer is almost done with the last peace 🙂 )

    • Profile picture of Perry
      Perry replied 8 years, 1 month ago

      Hello Marten. I came to that exact same conclusion last night while assembling my tendons. They have been very finicky and I am not confident the spring system will hold up. The wrist rotation really plays with the tensions and geometries. I was thinking of a system where the lines ran through the centerline of the wrist. The servo can be moved…[Read more]

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    I’ve updated the info (included a “How To” for my Finger_Starter kit V2:
    http://www.thingiverse.com/thing:1794206
    And here a video without the spring:
    • Profile picture of Richard R
      Richard R replied 8 years, 1 month ago

      Awesome Marten… going to try these servo pulleys with my new inMoov I am currently building… good work man…

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Thanks Richard,
        Mechanical way it looks good enough for me.
        These pulley’s will need the full 180 degrees from a servo !
        Make sure your servo’s supporting this 180 degree turn.

        My next step is to see, if the smaller servo’s are strong enough for the complete InMoov Hand !
        I hope to find some spare-time tomorrow, during my work… 🙂

    • Profile picture of Gael Langevin
      Gael Langevin replied 8 years, 1 month ago

      Great Marten! I want to see when the pulley is set in the servo bed how the servos are acting. As I said in our email exchange, I have burned so many MG996 and MG995, that I do not trust those servos anymore. I never, yet burned a HK15298.
      Initially when I created the pulley and the servo bed it was for to solve a restriction rotation of 90…[Read more]

      • Profile picture of Marten de Groot
        Marten de Groot replied 8 years, 1 month ago

        Tomorrow and the next two day’s I have some spare time during the day 🙂
        First I need to finish my Wrist update, this will help a lot to run more freely !
        Yesterday evening/night I’ve printed the first parts and one needs a small modification to fit better.
        When this fits well, I can draw the servo part…

        I will do my best, to show a moving…[Read more]

  • Profile picture of Dominique

    Dominique posted an update 8 years, 1 month ago
  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    Here two pictures from all MG996R servo’s and All CS238MG servo’s, to see the difference in the total weights.
    The CS238MG servo’s saving a 161 gram of weight and they are placed more closer to the elbow !
    Both are a positive part, to safe a lot of friction to all arm and shoulder servo’s

    For the CS238MG it was necessary to redesign a simple…[Read more]

  • Profile picture of Marten de Groot

    Marten de Groot posted an update 8 years, 1 month ago

    So, all five Servo Pulley’s are done to 🙂
    Tomorrow evening (after work) it’s time to assembling all things together.
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