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using a usb hub for jrks

Discussion in 'SimTools compatible interfaces' started by bsft, Feb 28, 2012.

  1. bsft

    bsft

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    Hello all, I am looking at using a usb hub to give me more ports, however as most feed off one usb and then go to 4, would this be a slow down in data transfer?
    I am planning to use my 2 jrks on the hub. Yes I can connect it to a USB 2.0 port.
    Any advice?
    Thanks, David.
    bsft, Feb 28, 2012
    #1
  2. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, JRK, SimforceGT, 6DOF
    Well its the way mines setup dont notice any difference to having them hooked direct
    eaorobbie, Feb 28, 2012
    #2
  3. bsft

    bsft

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    is it a powered or non powered hub please?
    bsft, Feb 28, 2012
    #3
  4. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    My Motion Simulator:
    2DOF, DC motor, JRK, SimforceGT, 6DOF
    non powered as jrks only source about 50milamps to run its mircocontroller.
    eaorobbie, Feb 28, 2012
    #4
  5. bsft

    bsft

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    Ok , thanks for that.
    :cheers:
    bsft, Feb 28, 2012
    #5
  6. gazz

    gazz Member

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    My Motion Simulator:
    Arduino
    can someone tell me what these 'jrks' are?
    i keep seeing them referenced, but it's like it part of a seceret code i dont know yet (shall i get my left nipple out and wiggle my right hand under my legs when you tell me :)
    gazz, Mar 1, 2012
    #6
  7. eaorobbie

    eaorobbie Well-Known Member SimTools Developer Gold Contributor

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    20,452Coins
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    My Motion Simulator:
    2DOF, DC motor, JRK, SimforceGT, 6DOF
    mmm should i test ya, mmmm might get shot for this :lol: :lol:

    Well the JRK is Pololu Jrk 12v12 USB Motor Controller with Feedback ,

    http://www.pololu.com/catalog/product/1393

    I discovered them awhile back and started to play with them to drive a wiper moter, inital had them hooked to a pololu serial servo controller to drive the cards by rc signal, which in turn xsim could drive the serial card through uso commands.
    But not long after they popped up here by Frakk and the question was asked, eventually I shared what i had found with all and eventually removed the serial servo controller by finially working out how to communicate to through their usb ports and bingo Jrks just start breeding. So now there is an easy off the shelf item that ya can wire a motor to plus a pot and fix it into a sim and calibrated it and start playing. An quick start to simming I call it. But always fun and rewarding to make your own, Im currently building a second for fun with the arduino. Still being able to jump on me jrk system and go for a drive and think.

    By the way Bsft ya can daisy chain the JRKs together to use one port. Havent tried thou.

    I use my hub as a safety device, any power surges that may happen when reversing polaritys and emf feed from free spinning motor is caught by the hub which blows and leaves my usb port on the laptop thats running the jrks and xsim safe.
    eaorobbie, Mar 1, 2012
    #7