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  1. #11
    if your VFD manual has a manual remote control some thing like this -

    Click image for larger version. 

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    you could connect the BOB like this

    Click image for larger version. 

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    John

  2. #12
    What I've found on the Web so far is for the spindle control it is as follows:
    Com - GND
    AN1 - 0-10v
    X1 - pin 17
    However looking at your diagram X1 (FW) is used for on off relay.
    Here's what I have vfd end Click image for larger version. 

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    I'll try out your diagram, will getting the wires wrong do any damage to the vfd?

  3. #13
    looking at your photo of the terminals
    this is how I would connect to the VFD
    with the forward on/off control being BOB's the relay controlled by pin 17
    Click image for larger version. 

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    yes
    the relay switches the VFD on in the forward direction
    and is the simplest control with one switch
    depending on the parameters set for input X1


    you could have 3 switches
    one for on / off

    a second for forward that works in conjunction with the on /off switch

    the 3rd being reverse that works in conjunction with the on /off switch

    John
    Last edited by john swift; 19-05-2018 at 07:14 PM.

  4. #14
    Hmmm whilst attempting to set up the VFD I have hit another snag and I am guessing its noise interference or which ever its called with the data cables. I am getting intermittent stalling on the motors and in one case when moving one axis another was twitching (all when manually jogging)
    #BIGsigh

  5. #15
    from your photo

    Click image for larger version. 

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    its not clear what is connected to earth
    I suspect from the little I can see
    its just the metal enclosure and the screen on the cable connecting the stepper drivers to the chassis connectors to the motors

    does the motion controller have an ethernet connection to your PC ?


    John

  6. #16
    yeah as its all in a wooden box the wires from the drivers to the motors are the only things earthed for the shielding.
    If I ground everything would that help with the interference?

  7. #17
    ok had done some reading and going to ground my components tonight and replace some wires with shielded wiring and see if that works as I've just read a few threads in regards to this issue and it all boiled down to shielding and earthing component's.

  8. #18
    that will explain the problems

    I can not see an earth connection to the VFD

    John

  9. #19
    Just a thought, I've got enough shielded cable for replacing the external leads to the motors from the 4 pin plugs via the control box, how do I ground this part of the cable or is it shielded via the internal wires that connect the drivers to the 4 pin plugs as I grounded them? do I attach it to part of the cnc frame?

  10. The Following User Says Thank You to Palletlad For This Useful Post:


  11. #20
    with 4 pin connectors you would have to connect the earth / screen to the shell of the 4 pin chassis plug

    and then the cable screen to the shell of the 4 way inline socket

    John

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