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IndustryArena Forum > CNC Electronics > Spindles / VFD > what is the easiest way to tell mach that the vfd/spindle is running or not?
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  1. #1
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    what is the easiest way to tell mach that the vfd/spindle is running or not?

    I am planning on just manually turning the the spindle on and off but I am concerned with how finicky the vfd can be sometimes. What is the easiest way to tell mach that the spindle is running or not? The only thing I am concerned about is the spindle faulting out for some reason and the machine just keeps going because it does not know the spindle has stopped. I am using a hitachi wj200vfd with the ebay special 2.2kw

    I'm not really interested in controlling the spindle with mach I do not really need that I just want to be safe and not end up with a machine crash scenario because of a faulted spindle.

  2. #2
    Community Moderator Jim Dawson's Avatar
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    Dec 2013
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    5014

    Re: what is the easiest way to tell mach that the vfd/spindle is running or not?

    That drive has a relay that can be programmed for many purposes, one of those being Drive Fault. Just wire the relay into your E-stop circuit and if the drive faults it will trip the E-stop.
    Jim Dawson
    Sandy, Oregon, USA

  3. #3
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
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    23761

    Re: what is the easiest way to tell mach that the vfd/spindle is running or not?

    Another couple of outputs that I used was at-zero-speed to indicate if the spindle was running, e.g. start the coolant pump etc.
    The other was up-to-speed in order for the Sxxx block to carry on to the next instruction.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

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