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  1. Open source crab robot simulator, now in Java on Github

    Updated my 2010 code to run in Java so it's more accessible, repackaged it on Github.

    Teach your crab to walk by learning from my example?

    Still looking for an 18 servo shield for Arduino so I...
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    Re: 3DOF palettizing robot running on Arduino

    https://www.youtube.com/watch?v=nYONZPmyZyg
    Training software synchronizes with the real machine. I'll be rolling out this software later to all my other robots, including hexapods, stewart...
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    Re: 3DOF palettizing robot running on Arduino

    Updated the thingiverse files. Easier assembly and maintenance. Add bill of materials.
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    Re: 3DOF palettizing robot running on Arduino

    Updated video with quieter drivers.

    https://www.youtube.com/watch?v=ObzyILAJFGQ
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    Re: 3DOF palettizing robot running on Arduino

    Looks like I've calculated the gearing wrong. 45 teeth on the big gear, 9 teeth on the small gear, ratio is 5:1, not 9:1. at 50cm reach the circumference is 2*r*pi or 314. the stepper motors are...
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    Re: 3DOF palettizing robot running on Arduino

    The grip on the pen is very tight. If the arm comes down too far it smashes the pen into the table, potentially damaging the table, the pen, or the arm. Ideally the pen holder keeps the pen from...
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    Re: 3DOF palettizing robot running on Arduino

    jwatte - the original post on my site includes the result picture close up.

    th232 - I just switched to a arduino+RAMPS controller with 1/16th microstepping and the precision is great, plus all the...
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    Re: 3DOF palettizing robot running on Arduino

    Writing "HELLO WORLD!" had to create the gcode by hand. :P


    https://www.youtube.com/watch?v=y1-ZIk8nOSQ
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    Re: 3DOF palettizing robot running on Arduino

    Part files: http://www.thingiverse.com/thing:280263

    Firmware: https://github.com/MarginallyClever/arm3

    More info:...
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    Re: 3DOF palettizing robot running on Arduino

    Yes, backlash is a serious problem. I guess I should say that the motors and the gearing and the electronics can - in theory - achieve as much as 1/20th mm precision. I'm working up to it. I'd be...
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    3DOF palettizing robot running on Arduino

    5449
    50cm reach. 0.05mm precision at full extension. Max load untested.

    I used an UNO and two Adafruit motor shield v2. Limit switches so the software can home on demand. Understands GCODE...
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    Question(s) Re: My Delta Robot

    Hi!

    I understand you're looking for code to drive your Delta robot? I wrote some OSS based on the trossen tutorials.

    Here you go: https://github.com/i-make-robots/Delta-Robot
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    Re: what do you use for universal joints?

    tician -

    For delta robots like (http://bit.ly/ZCeFUu) I don't have to worry about the 3rd degree so I'm looking seriously at some magnetic ball joints (http://bit.ly/19DK6li). Don't know what...
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    Re: what do you use for universal joints?

    I'm looking for....
    - 2 degree of freedom with at least +/-45 degrees range of motion. +/-90 would be fantastic.
    - 1kg weight limit
    - M3 mating
    - off the shelf availability and/or bulk pricing....
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    what do you use for universal joints?

    I've been using heim joints on my stewart platform

    http://www.youtube.com/watch?v=rhuM6Cnn5Pk

    and my delta robots

    http://www.youtube.com/watch?v=7AchUoL9qdo

    but they limit the range of...
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    Project Several projects at once

    Not sure if this should be a contest entry or not... Anyways, here's a few things I've been working on.

    An open source hexapod that I also put on Instructables:
    ...
  17. Re: Arduino controlling position of L12 Firgelli Actuator

    I might have done that at some point, I'm not sure. Will that destroy the board?
  18. Re: Arduino controlling position of L12 Firgelli Actuator

    I'm sorry but I'm not having any success with that method.

    I have a duemilanova.
    digital pin 3 is connected to the yellow wire on the actuator.
    12v+ (from a laptop power supply) is connected to...
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    Contest Entry Re: Summer of Projects: Project #3, DIY CNC

    I hope this helps you with your project:

    http://www.instructables.com/id/How-to-wire-an-arduino-based-3-axis-CNC-machine/

    I've been solving the same challenge from the other direction. I'm...
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    Contest Entry my personal hexapod SPIDEE-1

    http://www.youtube.com/watch?v=J3ySNng9vsg


    I started with Alibre and paper designs, then moved to plastic, and the latest version is aluminum (no video yet). I have released all the...
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