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    Re: 2018 Robogames Mech Warfare Final Results

    Happy to see this still going on! Looks great guys!
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    Re: For sale 18 MX-64T 14 AX-12A

    I still have 6 MX-64T servos that I will now sell for $180 each and my heavily used 14 AX-12A servos for $15 each.

    Please email [email protected] directly if you are interested in purchasing...
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    For sale 18 MX-64T 14 AX-12A

    I am selling my lightly used 18 MX-64T servos for $200 each and my heavily used 14 AX-12A servos for $15 each.

    MX-64T servos were purchased in late 2012. They have been used in my quad walker....
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    Re: OKQ1: 4DOF MX Quad Mech

    For what purpose? Taking to dynamixels? I am sure you could use any language that has a serial communication library. ROS supports C++, python and Lisp.
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    Re: OKQ1: 4DOF MX Quad Mech

    Yes the packet pictured is close to 170hz then it is to 200hz. The rate seemed to vary quite a bit when I was doing that initial test. It is much more stable now after I made a few more tweaks on...
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    Re: OKQ1: 4DOF MX Quad Mech

    After a few tweaks I am able to successfully read the goal position from OKQ1's 16 servos at 200hz!

    6115
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    Re: OKQ1: 4DOF MX Quad Mech

    Did a large rewrite of my class that handles sending dynamixel packets to my Arbotix_m making it much more efficient.

    Was able to read positions from my 16 servos at 50hz. Tried it at 100hz and...
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    Re: OKQ1: 4DOF MX Quad Mech

    I have been writing my own package named atmega_ros to interface with an Arbotix-m board and by extension dynamixel servos. My package is basically becoming a clone of the already available...
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    Re: OKQ1: 4DOF MX Quad Mech

    I have tested up to 30hz. I believe it is possible to get higher.

    Still have some intermittent hiccups in my Arbotix-M firmware that I need to diagnose.
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    Re: OKQ1: 4DOF MX Quad Mech

    Made some more good progress the last few weeks and also found some time for a much needed vacation.

    My focus has still been interfacing ROS with my hardware. I have written a sync read function...
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    Re: OKQ1: 4DOF MX Quad Mech

    Continuing to make progress on OKQ1 and ROS. This last week I have been focusing on communicating with hardware and cleaning up my ROS packages.

    Below is a video of my testing set up. You can see...
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    Re: OKQ1: 4DOF MX Quad Mech

    Yes you! Thank you for the kind words. Yes I have been very happy with the MX servos and they perform great. I never took the tracking/autotarget much past a prototype.

    The plan at the moment is...
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    Re: OKQ1: 4DOF MX Quad Mech

    Inspired by KevenO's and R3n33's ROS progress with their hexapods I am continuing work on OKQ1. Over the last few nights I have worked a bit with odometry to get my simulated robot to walk in...
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    Re: OKQ1: 4DOF MX Quad Mech

    All four legs...


    http://youtu.be/R67bsDe8hYE
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    Re: OKQ1: 4DOF MX Quad Mech

    I was able to hack up my existing AVR gait and IK code enough to get a visulization of a single leg walking working tonight.


    http://youtu.be/6x0UgOJ4gJU
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    Re: OKQ1: 4DOF MX Quad Mech

    I am interested! Always great to see how different people have solved (or tried to solve) walking locomotion.
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    Re: OKQ1: 4DOF MX Quad Mech

    Nothing yet. Just simulating so far.

    I am considering two options. First being the USB2AX and the second is using an arbotix-m running some custom ROS firmware.
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    Re: OKQ1: 4DOF MX Quad Mech

    Wow its been almost exactly a year from my last post! Time sure does slip away when you are busy...

    Over the last few months I have been slowly learning ROS. After running through the tutorials...
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    Re: OKQ1: 4DOF MX Quad Mech

    Found some time this weekend to get OKQ1 back up and walking.

    I have made a few improvements that simplify the gait and motion engines and have started to iron out the controller communication...
  20. Thread: biped NUKE

    by Upgrayd
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    Re: biped NUKE

    According to Github I did that 2 years ago!

    I basically cut and past the kinematics and gait portions of the darwin framework and had it running on the original Beagle Bone SBC.
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    Re: OKQ1: 4DOF MX Quad Mech

    Hello all. I am not dead! Just very very busy with work and new found interest in other hobbies.

    I received an early version of the Arbotix-M a while back. I have mounted it on OKQ1 and rewrote...
  22. Sticky: Re: MW 2013+ Ruleset Additions and Changes Discussion

    RFID Game Elements:

    This is a fantastic idea that opens up a lot of game design space. Simply attaching RFID tags to the underside of mechs that are read by readers around the arena adds no...
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    Re: Overloading MX-64: Am I doing the math wrong?

    My MX-64 quad has been able to stand for over an hour without issue.
    Is your software continually sending goal position commands even when no movement is required?
    I recall having similar issues...
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    Re: Transponder schematic questions

    The header labeled 'I' is 'Indicator' is the output for the LED board.
    The header labeled 'H' is 'Hit' is the output to a user’s controller.

    Pin out for all the headers is Gnd->5v->signal...
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    Re: Transponder schematic questions

    You are probably looking at the schematic for the 2012 board.

    We were rushed to get it done in time so I just used a standard linear regulator symbol and wired it up to match the actual component.
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    Re: ROBOT FIGHTING LEAGUE coming to tv

    The random people as operators and fake explosions on hits are just silly. Not to mention that the show is an hour long with only 10 min of real robot fighting content.

    I can appreciate the...
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    Re: ROBOT FIGHTING LEAGUE coming to tv

    Links to a computer generated advertisement and a two minute video that managed to have zero content. Amazing.
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    Re: OKQ1: 4DOF MX Quad Mech

    It was no so much that I was having trouble. It is more about knowing achievable improvements were possible over the results I was seeing.
    I would't call adding a 'real' CPU to a realtivly simple...
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    Re: OKQ1: 4DOF MX Quad Mech

    Running out of time fast!

    I have completed the conversion from floating point to fixed point math. That was difficult and took much longer then I would have liked. But in the long run I learned a...
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    Question(s) Re: ScorpionX MX-64T Robot Turret

    You have far too many changes and variables floating around here to really tell what is going on.

    What I would do:
    - Disassemble your turret and work with just a single servo connected to the...
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    Question(s) Re: phantom ax12 stopped working

    You have not provided enough information for anyone to help you.
    What code did you upload and where did you get it?
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    Re: 3D printed turret

    I have no idea what exactly I am looking at. Perhaps add some other views or descriptions?
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    Re: Funding for Mech Warfare

    The Robogames assigns the competitor's pit area. MechWarfare organizers have no influence over this.

    Basically any group outside Combots just has to just work with whatever is given to them.
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    Re: Pre-qualification + wifi setup

    I do not believe that we have written any hard rules for the pre-qualification.

    Ideally the video should show your robot walking around, shooting, transmitting video and wirelessly controlled...
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    Question(s) Re: controlling 6 ax-12a's with an arduino Mega

    Looks like you probably have communication collisions.

    You are sending individual packets to the servos but not dealing with the individual status packets the servos return.

    Three possible...
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    Re: Battery re-charging: Removable or in-place?

    Having an easily replaceable battery is a must. We run matches back to back and if you are in the finals you will be playing in very quick succession without much time to charge up a single battery.
  37. Project Re: A modified PhantomX to add another degree of freedon running Phoenix software.

    Why send NUMSERVOS*2 individual packets over just sending a single sync write or broadcast packet?
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    Re: Mech Warfare MWScore Scoring System

    Gertlex,

    It had something to do with incorrect packets or how python on windows handled strings. I can not recall exactly.

    I belive that the changes jwatte made correctly address the problem.
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    Re: target panel mounting question

    It would be best to post a picture or drawing of what you are describing. If you have any doubts you want to have it cleared up now.
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    Re: Mech Warfare MWScore Scoring System

    Cool! I will incorporate the changes whenever I get some time to look it over. I added the socket server score broadcast last minute last year just to see if I could get such a thing to work.

    Good...
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