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News New higher Voltage / Amperage JRK's!!!

Discussion in 'Ready, set, go - Start your engines' started by Brett Horton, Apr 20, 2018.

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  1. Brett Horton

    Brett Horton Active Member

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    • Informative Informative x 3
    • Like Like x 1
    Brett Horton, Apr 20, 2018
    #1
  2. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    24v 27 amps is still a bit weak in comparison to what dimension engineering is offering. but its almost double the original. this should be a nice upgrade should someone decide to go this route. good find, especially with the 40% off.
    • Agree Agree x 1
    bruce stephen, Apr 20, 2018
    #2
  3. AussieSim

    AussieSim Member

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    Is there a guide as to which G2 to buy ?

    My interest would be for a small wiper motor and separately for a rear traction loss actuator.
    AussieSim, Apr 20, 2018
    #3
  4. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    IMHO you will get better bang for your buck with a sabertooth 2x32.
    bruce stephen, Apr 20, 2018
    #4
  5. titomaky

    titomaky Member Gold Contributor

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    ¿Cuál es la diferencia entre popolu e IBT2?
    titomaky, Apr 21, 2018
    #5
  6. Milton

    Milton Well-Known Member Gold Contributor

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    JRK comparancy.JPG
    Milton, Apr 22, 2018
    #6
  7. Milton

    Milton Well-Known Member Gold Contributor

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    Question for everyone, what do you recommend?

    I notice that the "Quantity Available" shows me that the 24v21 and the 24v13 are the most popular items.

    FYI: I have the 12v12.
    Milton, Apr 22, 2018
    #7
  8. Milton

    Milton Well-Known Member Gold Contributor

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    My power supply output is 12V at 47 Amp Maximum with 575 Watts Maximum

    Attached Files:

    Milton, Apr 22, 2018
    #8
  9. bruce stephen

    bruce stephen Hammer doesnt fix it, must be electrical

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    do your motors support24volt?
    bruce stephen, Apr 22, 2018
    #9
  10. Milton

    Milton Well-Known Member Gold Contributor

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    Yes! they actually can operate from 12v to 24v but I do not have 24v power supply
    Milton, Apr 22, 2018
    #10
  11. Milton

    Milton Well-Known Member Gold Contributor

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    i am thinking to go with the 18v27 because of the Higher Amps... is that a good decision?

    JRK comparancy 2.JPG
    Milton, Apr 22, 2018
    #11
  12. Nick Moxley

    Nick Moxley Well-Known Member

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    Yes Morton you want the 18v27

    and here's some info for the guys curious on the differences between the old and new, https://www.pololu.com/docs/0J73/1.2

    Ive got a pair coming for myself after a long discussion with support and sales, We'll see what there all about.
    • Like Like x 2
    Nick Moxley, Apr 28, 2018
    #12
  13. Milton

    Milton Well-Known Member Gold Contributor

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    I got mine already here are some pictures next to the JRK 12v12 and the new JRK 18v27

    image1.JPG

    image2.JPG
    image3.JPG
    • Like Like x 3
    • Informative Informative x 1
    Milton, Apr 28, 2018
    #13
  14. Archie

    Archie Eternal tinkerer

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    Hi Guys,

    Can anyone confirm if these 18v27's still run at 12V but cope with the higher Amperage??

    The specs only state a MAX which makes me think 12V would work fine..?
    Archie, May 1, 2018
    #14
  15. Archie

    Archie Eternal tinkerer

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    Never mind. Should have Google'd first :)

    From Pololu site: This version offers a wide 6.5 V to 30 V operating range and can deliver continuous output currents up to 27 A without a heat sink.
    Archie, May 1, 2018
    #15
  16. Nick Moxley

    Nick Moxley Well-Known Member

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    AND if we do need to cool them , you cool from the bottom side mosfets. ;)
    Nick Moxley, May 1, 2018
    #16
  17. Archie

    Archie Eternal tinkerer

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    So tempted to get these and some new motors.

    My 50:1 worm drive gears have started to slip. I can be sat in my seat with the power off and moving in the seat will cause the motors to drop to the floor :( . Just likes the 25:1's do... In fairness, they have been hammered for the best part of two years! :)
    • Informative Informative x 1
    Archie, May 2, 2018
    #17
  18. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    I have mentioned a number of time that 50:1s can be back driven after they are broken in.

    So far 60:1s on my rig still can't be back driven even after years of use.
    • Like Like x 1
    noorbeast, May 2, 2018
    #18
  19. Archie

    Archie Eternal tinkerer

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    Yeah. Thinking 60:1's are the way to go.

    Apologies @noorbeast - Must have missed that post, it's good to know it's not a design flaw and more an expectation :)

    Anyway, as you were, I don't want to hijack this JRK thread with my musings... :D
    Archie, May 2, 2018
    #19
  20. Archie

    Archie Eternal tinkerer

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    • Like Like x 1
    Archie, May 2, 2018
    #20
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