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IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > Current setting for TB6560 3-axis board (eBay)
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  1. #1
    Join Date
    May 2010
    Posts
    0

    Current setting for TB6560 3-axis board (eBay)

    I just have my 3-axis board from eBay ( ) in hand. The chipset is TB6560. I will be using this board for my mini cnc router. Lowest current setting for this board is 1.5A (using dip switches).

    Unfortunately my steppers are 1A and I have to set it in the board. The board shipped with 0.22 ohm registor (red-red-silver-gold), which you can see from the image. It has a DIP switch for current setting but I think I need to replace the registors for having lower current setting (1A).

    Somebody having knowledge on this board please advice.

    By the way, I also attached the config doc, which I received from the seller.


    Thank you in advance.
    Attached Thumbnails Attached Thumbnails TB6560.jpg  
    Attached Files Attached Files

  2. #2
    Join Date
    Jun 2008
    Posts
    467

    Post

    Leaveme,

    .5 ohm resistor for 1 amp output.

    JoeyB
    A doughnut a day keeps the doctor away.

  3. #3
    Join Date
    May 2010
    Posts
    0
    Hi JoeyB,

    Thank you for yor help.
    Do you mind to share the calculation...I mean the way you calculated it.
    Also appreciate your opinion about the dip switch setting.

    Dip settings are like this:
    current - sw1-sw2
    ------------------
    100%----on---on
    75%-----on---off
    50%-----off---on
    25%-----off---off

    I suppose my setting will be 50% for .5 ohm. Am I right?

    regards

  4. #4
    Join Date
    Jan 2011
    Posts
    8

    tb6560 Current Setting

    According to the TB6560 spec sheet the current at 100% is 0.5/Resitance. For 0.22 resistors this is .5/.22 = 2.27 amps.

  5. #5
    Join Date
    Jun 2011
    Posts
    0
    Sorry lost the info... machine crashed

  6. #6
    Join Date
    Nov 2012
    Posts
    0
    I'm sorry for digging this old thread but I have a similar question.

    I bought this driver (TB6560AHQ -> 1.5-3A 3.5A Peak ... I'm still saving money to buy 3 geckodrivers) to drive three Nema 23 stepers wired as Bipolar series. They require 2.1A but the closest setting that I have is 75% which outputs 2.25A.

    Will it hurt the steppers if I set the current to 75%? If I can't, what should be the resistor value to output the 2.1A that I need?

    Thanks!

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