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  1. #11
    BTW I think nominal voltage is 15v not 24v. You will probably need to use one of stepper outputs to start inverter, if it takes 5v then you could directly connect if not you will need relay or something similar.

    Poslano sa mog MI 5 koristeći Tapatalk

  2. #12
    A small relay so that you dont burn BOB output

    Poslano sa mog MI 5 koristeći Tapatalk

  3. #13
    I have decided that the board is duff, as after having a fiddle with it this morning, the spindle will turn on/off intermittently with nothing being changed.

    I have emailed the seller and am awaiting a response.

  4. #14
    Noddy how did you get the speed control working on this board?
    Mine turns on and off via the relay OK but I can't figure out how to get 0-10V out of it?


  5. #15
    Might be worth considering RS485 two wire solution for the VFD. That is the way mine works, same BOB as yours.

  6. #16
    Thanks for the fast reply Chaz!
    I didn't realise RS485 was an option. Are you running a separate cable from your PC for this?
    I'd like to just have a single cable if possible, but I'll look into it more if I can't get this working.

    I've set it up as shown in the manual with a potentiometer making a voltage divider. It works well which means I've got my VFD set up correctly to accept a -10V input.
    Click image for larger version. 

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    I don't understand how to get a 10V signal from the BOB though.
    Click image for larger version. 

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    I'm not measuring any voltage across the two "0-10V Spindle Speed Output Connector Inverter" pins.
    Do I need to feed it 10V from the VFD? Is the PWM port involved some how?

    Any help would be appreciated.

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #17
    Ye, i didnt wire mine but from the PC it goes via a cheap USB to RS485 dongle thing. Two wires to the drive, that's it. You then use either Matty Zee or one other dudes Mach3 plugin to make it work.

    The BOB isnt used at all in this method.
    Last edited by Chaz; 21-05-2017 at 09:35 PM.

  8. #18

  9. The Following User Says Thank You to carl1961 For This Useful Post:

  10. #19
    Thanks Carl, I couldn't find nay info last time I looked.
    I tried and failed getting it to work with RS485.
    Works great now!

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