Results 1 to 8 of 8

Thread: AX-12 Cables

  1. #1
    Join Date
    Feb 2010
    Location
    Northern, VA (Fredericksburg)
    Posts
    104
    Images
    10
    Rep Power
    38

    AX-12 Cables

    Greetings,

    I was looking at buying some wire and connectors to build up some new cables for my AX-12's and was surprised to find Trossen didn't carry any thing. Does anyone else do this? Maybe Trossen would start to carry some stuff if there was enough interest? (Andrew/Alex??)

    My main concern is buying wire, I looked at some nice ribbon cable I think would work well.

    http://www.newark.com/molex/88803-00...-5m/dp/35M3458

    but its about 100.00 bucks for 100 ft, and I realistically only need 10-20 ft.

    Anyone else have any thoughts/ideas?

    Cheers,
    Scott

  2. #2

    Re: AX-12 Cables

    The standard AX plugs are crimp not IDC. Ribbon cable is not so easy to crimp by hand and not easily available in heavier gauge and more flexible versions. You would have to carefully route the cable to make sure it always bent in the right direction. If you want to use ribbon, then the coloured stuff splits quite easily between colors, so get any width from surplus or broken equipment and split it.

    The biggest issue in making connectors is the crimping. You need a very small crimp tool and have to get exactly the right pressure to ensure a high quality crimp. Sometimes even a good crimp will distort the pin, making later intermittent problems.

    I make my own cables for prototypes and development, but use Robotis cables on final robots wherever possible.

  3. #3
    Join Date
    Feb 2010
    Location
    Northern, VA (Fredericksburg)
    Posts
    104
    Images
    10
    Rep Power
    38

    Re: AX-12 Cables

    When I make my own I will most likely just solder the wire to the sockets, as I just can't justify paying 100 - 200 bucks for the crimp tool. I have made some cables before, not a production quantity for sure, but they were usually in the 20-40 pin style and had multiple requirements for shielding and jackets etc. I can't imagine that these tiny three pin's would be to difficult.

    As far as the wire goes, currently I am just prototyping and testing the servo's so I don't need to worry about the wires bending much, but I can see how that could become an issue if they were going through multiple bends in a small area. Does anyone use shielded wires? If so how do you ground the shield after the first servo?

    Cheers,
    Scott

  4. #4
    Join Date
    May 2008
    Posts
    2,228
    Images
    155
    Rep Power
    132

    Re: AX-12 Cables

    When making AX cables -- you really want them to be something like stranded silicone wire so that they can bend a lot and not break, regular wire degrades fast on a moving robot.

    The connectors and pins are quite cheap at Digikey. You *can* crimp them without an expensive tool. The $10 crimpers from Radio Shack, or even a pair of pliers will suffice. Give yourself a few spare pins to learn on, and you should have no problem. Many of my bots have custom wiring harnesses in them -- since I can't buy an off-the-shelf 3' long AX cable.

    -Fergs

  5. #5
    Join Date
    Feb 2010
    Location
    Northern, VA (Fredericksburg)
    Posts
    104
    Images
    10
    Rep Power
    38

    Re: AX-12 Cables

    Thanks Fergs, that is more what I was thinking :*)

    -Scott

  6. #6
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,317
    Images
    27
    Rep Power
    283

    Re: AX-12 Cables

    Just placed an order today for 500 crimp pins from digikey (along with ~$200 in other parts). Hopefully this cheap-ish crimper will work, but I should know for certain in ~4 days. As the project the 3-pin connectors are currently intended for will be stationary and connected over significant distances, I plan to buy the cheapest 3/4-conductor cable I can find.. When I do start with the actual replacement cables for the AX-12+, I think I will probably be going with Jon Hylands' recommendation (or maybe this or this).



    EDIT: Had suggested a $25 250-ft pull box of 4-wire phone cable from RadioShack, but that's not gonna happen with ~$72 shipping.
    Last edited by tician; 03-15-2011 at 06:52 PM.
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    [git][mech][hack]
    gives free advice only on public threads

  7. #7
    Join Date
    Feb 2010
    Location
    Northern, VA (Fredericksburg)
    Posts
    104
    Images
    10
    Rep Power
    38

    Re: AX-12 Cables

    I think I will probably be going with Jon Hylands' recommendation
    In this post Jon Hyland says to use 20 AWG but what I read on Digi Key was that the connectors are for 22-28 AWG. Can anyone elaborate on this?

    Also, thanks for all the help guys :*)

    Cheers,
    Scott

  8. #8
    Join Date
    Sep 2010
    Location
    ಠ_ಠ
    Posts
    2,317
    Images
    27
    Rep Power
    283

    Re: AX-12 Cables

    I'm guessing the 22-28 AWG rating is not absolute. Looking at the dimensions in the datasheet, it may be possible for 20 AWG wire (with its diameter of 0.812mm) to be properly secured in the crimp opening. I'll give it a try when I get the parts and see how large a wire I can fit in the pin.
    Please pardon the pedantry... and the profanity... and the convoluted speech pattern...
    "You have failed me, Brain!"
    [git][mech][hack]
    gives free advice only on public threads

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Trouble with AX-12+ cables & connectors
    By Pi Robot in forum DYNAMIXEL & Robot Actuators
    Replies: 3
    Last Post: 07-10-2010, 08:55 PM
  2. Question(s) RX-64 4-pin connector cables
    By dsahm in forum Arbotix, Microcontrollers, Arduino
    Replies: 2
    Last Post: 07-24-2009, 01:26 PM
  3. Question(s) Extending servo cables
    By Dementedwombat in forum Robotics General Discussion
    Replies: 8
    Last Post: 01-24-2009, 09:09 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •