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Thread: Safety trim wiring in parallel

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  1. #1
    Senior Member Esser's Avatar
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    Default Re: Safety trim wiring in parallel

    This is for the brand “safety trim”. It’s a controller that slows down the speed of the trim motor in faster flight. It also has runway protection etc. It’s wiring diagrams have a lot of the wires wired in parallel. So you would have two wires attach to the red and two to the black on the motor. And I’m not sure with a 18-22 butt splice if I can put two 20 gauge wires in One end.
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  2. #2
    Administrator DesertFox4's Avatar
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    Default Re: Safety trim wiring in parallel

    TCW Technologies, one of our great site sponsors, makes this safety device.
    Learn more about it here:
    http://www.tcwtech.com/safety_trim.html#features


    DesertFox4
    Admin.
    7 Super Sport
    912 ULS Tri-gear


  3. #3
    Senior Member jiott's Avatar
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    Default Re: Safety trim wiring in parallel

    OK, now I see what you are talking about.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  4. #4
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    Default Re: Safety trim wiring in parallel

    Josh, What model trim contoller do you have? Sounds like you might have a dual axis controller and harness for single axis use. Should have 10 wires for single axis and 14 for dual axis - none doubled up.

    On current single axis models - #3 (yellow) should go to red (+) on the servo and #4 (also yellow) should go to black (-) on the servo.

    Greg

  5. #5
    Senior Member Esser's Avatar
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    Default Re: Safety trim wiring in parallel

    It is single axis model ST-1-12v-2sp-HD

    Here are pictures of my install instructions from TCW and kiyfox. Note pins 4,12 3,11 7,15 1,9

    I just noticed that there is s note that says these parallel connections are for servos rated for more than 5 Amps. So why is the Servo itself a 22awg wire?
    Attached Images Attached Images
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    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  6. #6
    Senior Member Esser's Avatar
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    Default Re: Safety trim wiring in parallel

    I don’t know why my pictures are posting so small. Hope you can still see
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  7. #7
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    Default Re: Safety trim wiring in parallel

    Your servo is likely rated for way less than 5 amps, hence 22 ga wire. If so this is the wiring diagram currently being used:

    http://www.tcwtech.com/Installation%...20st-1-12v.pdf

    Greg

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