stupid question regarding a KATO N scale motor

Carl Sowell Mar 13, 2022

  1. Carl Sowell

    Carl Sowell TrainBoard Supporter

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    Hi my name is Carl and I am a trainaholic and have been model railroad involved since I was 6 years old.
    I know where to solder a grey / orange motor wires when the motor is still in the cage and loco. However, I have pulled one out of my parts box and need to wire it for a decoder. I think I have read somewhere that the bottom of a motor will be painted white, that may be a pipe dream(?). So my question is how to tell which side is up and which side is down. I can put a battery to turn the shaft but I have no clue which direction a KATO motor should turn to go forward.

    Any help is appreciated, please. BTW this is in a KATO SD-90/43, also there is no paint of any color on this motor.
     
    Doug Gosha likes this.
  2. Doug Gosha

    Doug Gosha TrainBoard Member

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    I visualize which direction the gears on the wheels are going, when the loco is going forward, and so, the gears driving those are going the opposite and gears driving those would be going the same direction as the wheel gears and so on until you get to the worm gear. Then you can determine which direction the spiral on the worm needs to be traveling (forward or backward) to turn the worm gear in the correct direction and which direction the worm needs to be turning to make the spiral travel in the correct direction. The motor shaft needs to turn in the same direction.

    Clear? :D

    Doug
     
    Carl Sowell likes this.
  3. Carl Sowell

    Carl Sowell TrainBoard Supporter

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    Doug,

    Yep, clear as mud !! Actually I do understand, I just had not thought of it that way. Thanks for comment.
     
    Doug Gosha likes this.
  4. Sumner

    Sumner TrainBoard Member

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    Carl Sowell and Mr. Trainiac like this.
  5. Doug Gosha

    Doug Gosha TrainBoard Member

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    You DCC guys and your cheating.

    :D

    Doug
     
    Shortround likes this.
  6. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Changing CV29 also changes the light behavior.
     
    Carl Sowell likes this.
  7. CSX Robert

    CSX Robert TrainBoard Member

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    Good point. Most decoders will also let you remap the functions to account for the lighting.
     
    Carl Sowell likes this.
  8. woodone

    woodone TrainBoard Member

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    You can change the direction in CV 29, But the best way is to reverse the motor leads.
    A year from now you will have a problem with the loco, do a decoder reset and can not figure out why it runs backwards, and will not remember that you change CV 29 way back when.
     
    Doug Gosha likes this.
  9. DCESharkman

    DCESharkman TrainBoard Member

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    Well the only stupid question, is the one un-asked!
     
  10. MetraMan01

    MetraMan01 TrainBoard Member

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    I’ve done this. It sucks. It’s actually on my to do list to take apart and redo the soldering and get it the right way.


    Sent from my iPhone using Tapatalk
     

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