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Thread: Stepper Motor wiring datasheet unclear

  1. #1
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    Stepper Motor wiring datasheet unclear

    EDIT: ******
    got it to work:
    for 57STH76-2808S the bipolar serial connections are:
    [blue+redwhite / green+blackwhite]
    for reasons i dont understand yet
    [red+bluewhite / black+greenwhite] also works - does it mean it makes no difference if i connect the outer or inner coil ends?
    ******

    hi
    (first post - so i cant post links directly)

    i bought 3 "M57STH76-2808S" 8 wire stepper motors - and i cant figure out the colors to connect, to get it in bipolar serial mode
    ##link in second post!
    as you can see the little ' symbols are missing on the color index..
    now the real problem:
    i could just assume they are down the row (A,A',C',C,etc.), but! - i looked up the "neighbor" motors:
    ##link in second post!
    and you will see they have it both ways: some lists go +,-,-,+ and some +,-,+,-.. you see the problem.
    now for some reason the motors came with 2x2 wires already connected - namely [black+greenwhite] and [red+bluewhite] which doesnt add up whith the data sheet (either way) as they connect the outer coils (is this a problem by the way? all graphics show always the 'closer' coil wires connected)
    i know i could find out by wiring different combinations and find out, but this is the first time i have a stepper motor in front of me, and there are 100 other things like mach3, driver etc that could be wrong - i just dont know yet, so i can not test it this way.
    if anyone knows this motor, or has a solution - please help.
    thanks!

    ps: i have a 30v 8A power supply and 3 of these motors - is bipolar serial the right answer - i read the last days a lot about ohms law, but still cant figure out if this is the right mode for me considering the power supply (i will need rather low rpm - as they are going to be connected to a belt/pulley setup)
    the controller is a Toshiba-TB6560AHQ (i know...)
    Last edited by atair; 03-24-2012 at 10:29 AM.


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    Serial mode is...

    A AC C
    B BD D


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    yes it is - but the problem are the colors..


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    A Blue&White
    A Blue
    C Red&white
    C Red

    B Gren&White
    B Green
    D Black&White
    D Black

    Blue to red...thats one winding

    Green to Black....second winding


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    thanks!
    can you tell me also the + / -?
    and how do you know which is which?


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    - is the singular colours.


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    unfortunately its not always with this company:
    http://www.motioncontrolproducts.com...TH56-3008B.pdf
    here the "-" switches between blue and red-white..
    as is said, some others are "-" with singular color - but not all, and in my datasheet the information is missing

    and my motors came with blue-redwhite and black-greenwhite connected (twisted together) - as it is would be ok according to the datasheet above.
    but to make this even more complicated, the only other motor with the id M57STH76-2808* in this case, one with 2 shafts:
    http://www.motioncontrolproducts.com...76-2808D-1.pdf
    is as suggested above: all singular colors are "-"

    to not lose track -this is mine: http://www.motioncontrolproducts.com...TH76-2808S.pdf


    confusing!


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    unfortunately its not always with this company:
    Then you have a problem then.

    Best contact Motion Control because all roads lead to them,seems that any data sheet from other sites links/refers to this company for the PDF.


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    i tried it the hard way now - and [blue+redwhite] [green+blackwhite] at least give some response..

    X AXIS: enable pin 5V, direction 0,8V?
    motor running in mach3, but it turns only in one direction!

    Y AXIS: enable pin 5V, direction 5V
    is locked (jumps a bit on reset), but does not move

    Z AXIS: enable 0,8V, direction 5V
    nothing.. i can rotate it by hand.


    - mach3 settings are tripple checked with the manuals form TB6560AHQ
    - lpt is onboard, 2004 athlon xp..
    Last edited by atair; 03-23-2012 at 09:28 PM.


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    it was the lpt port..
    i got a pci 5v card today:
    DELOCK 89004 and set the port according to the device manager resources...

    now everything works, but still have two options (both work)
    [blue+redwhite / green+blackwhite]
    for reasons i dont understand yet
    [red+bluewhite / black+greenwhite] also works - does it mean it makes no difference if i connect the outer or inner coil ends?


  • #12
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    Both works because they result in the same current flow direction through the coils.

    You should try bipolar parallel. It will almost certainly give you better performance.


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