Need Help! Problem when GND XGND and FDW are connected..


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Thread: Problem when GND XGND and FDW are connected..

  1. #1
    Member loundor's Avatar
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    Default Problem when GND XGND and FDW are connected..

    Hi everybody, I need some help about my cnc machine, I explain me:
    First, sorry for my very good and beautiful english!!

    So, I have a BoB STB5100 and a 2.2Kw spindle with VDF Y620-A
    the setup of the VFD are okay ,I can control the VFD in MACH3 ON/OFF and spindle frequency.

    The wire connection between VFD and BoB are:
    VFD To BoB

    XGND -> COM
    GND -> GND
    10V -> 10V
    AVI - > Vl1
    FWD -> FWD or Output#1

    Now my problem is, sometime (almost all the time) when a connect my BoB to MACH3 and the VFD is switched on, I get a communication error.. sometime that work but max 2min. When I just disconnect the Xgnd or FDW wire, thats work without problems (of course a can't turn on the spindle with mach3 but I can control the frequency speed).
    By the way when a make a bridge between XGND and FWD (means the FWD and XGND are not connect to the BoB), I have the same problem!
    I had tried to put some capacitor and diode as filter, change nothing.

    Some people know this problem??? thx

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  2. #2
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    Default Re: Problem when GND XGND and FDW are connected..

    hi
    also i am using this stb 5100 card
    unfortunately I can't manage the 10V output.
    measuring with the tester when I turn on the spindle I do not detect any 0-10v voltage.
    some idea?
    thank you



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Problem when GND XGND and FDW are connected..

Problem when GND XGND and FDW are connected..