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IndustryArena Forum > CNC Electronics > CNC Machine Related Electronics > Connecting MPG to PC or G540 - I'm confused!
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  1. #41
    Join Date
    Feb 2008
    Posts
    521

    Re: Connecting MPG to PC or G540 - I'm confused!

    Quote Originally Posted by mactec54 View Post
    Opto-isolation is doing what is needed, you always want to isolate the computer from and outside devices. as for any cable needs you can get that in the UK
    No mention of opto - isolation on linked device! Signal CONDITIONING is not isolation! I suspect it cleans noisy signals.

  2. #42
    Join Date
    Jan 2005
    Posts
    15362

    Re: Connecting MPG to PC or G540 - I'm confused!

    Quote Originally Posted by kawazuki View Post
    No mention of opto - isolation on linked device! Signal CONDITIONING is not isolation! I suspect it cleans noisy signals.
    I believe there are 2 Opto chips on this Breakout Board, this is standard for any Breakout Board to be opto-isolated, in general any type of hardware connected to a computer should have Opto-isolation.

    If you are unsure contact the CNC4PC an email cost's you nothing
    Mactec54

  3. #43
    Join Date
    Jun 2005
    Posts
    1723

    Re: Connecting MPG to PC or G540 - I'm confused!

    If you got your board from cnc4pc download the manual and schematic they are all available

  4. #44
    Join Date
    Apr 2011
    Posts
    13

    Re: Connecting MPG to PC or G540 - I'm confused!

    I have a problem with the IMach3 pendant. I've tried plugging it in several USB ports but it still seems to conflict with the USB 485 for my VFD. When the pendant is plugged in and I start Mach3 I get an error stating VFD can't connect. Has anyone come across this before?

  5. #45
    Join Date
    Aug 2005
    Posts
    1091

    Re: Connecting MPG to PC or G540 - I'm confused!

    Presumably the pendant and RS-485 devices are installed as USB serial devices on the computer.
    Check if the USB serial port assigned Com port number for the RS-485 adapter has not changed.
    You can check that in the PC devices tab.
    Cheers
    Peter


    Sent from my iPhone using Tapatalk Pro
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com/store

  6. #46
    Join Date
    Apr 2011
    Posts
    13

    Re: Connecting MPG to PC or G540 - I'm confused!

    I can see the port that the USB 485 for the spindle is but the iMach3 pendant doesn't show a port number. I've looked in the device manager and there is no port that is showing up for the iMach3 pendant and when you go into Mach3 to configure it there is no place to assign it a port#. I gave the the 458 a different port number and I can get it to work thinking pendant was trying to use that port# by default but when I plug the pendant back in I get the same problem that the VFD can't see the port anymore.

  7. #47
    Join Date
    Aug 2005
    Posts
    1091

    Re: Connecting MPG to PC or G540 - I'm confused!

    Hi,
    The iMach pendant may be installing as a HID (human interface device), but it should be visible somewhere in the list of installed devices. That said it probably won’t help solve your problem.

    It may be that the plugin for the iMach is interfering with the Modbus functionality.
    Have you contacted the iMach people? They should be able to shed some light on what may be going on.
    Cheers
    Peter.


    Sent from my iPhone using Tapatalk Pro
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com/store

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