G-Rex & Spindle Control???


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Thread: G-Rex & Spindle Control???

  1. #1
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    Default G-Rex & Spindle Control???

    I'm contemplating dumping my noisy wood router and getting a spindle
    and VFD for my cnc, but I thought that I heard that the G100 doesn't
    allow for spindle control with Mach3? Is this the case, or am I
    delusional?

    Are there any other limitations with the G100 that I should be aware
    of for the future as well? I know there's some question about 3D
    stuff also?

    System: G100, G203v's, Mach 3.

    Thanks,

    Don

    Don Williams
    D.E.Williams Guitars

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  2. #2
    Member phomann's Avatar
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    Hi Don,

    The G100 does cater for spindle control. It produces a 0-5V analog voltage from the speed setting in Mach3. The voltage that is output is a proportion to the maximum spindle speed. As an example.

    Max spindle speed is 2000rpm.
    Mach3 commanded speed 500rpm

    G100 voltage output = 500rpm/2000rpm *5V = 1.25V

    The G100 generated analog voltage outputs are NOT isolated. So you need to be careful as to how you use it with a VFD or motor controller. Some of these have the 0V reference for the 0-10V control input at around 10V below the mains voltage.

    If this is the case, it will cause a lot of excitement and damage if you connect the G100 to it.

    I produced a DigiSpeed, the DC-03 that was designed to interface the G100 to VFDs and DC motor controllers.
    http://homanndesigns.com/store/index...products_id=21

    The DC-03 will take a 0-5Vdc analog voltage and produce an ISOLATED 0-10Vdc control voltage suitable for VFDs and DC motor controllers.

    It also has an optional DC/DC converter that is useful as some DC motor controllers can only supply 1-2 mA for the control voltage supply. VFDs can usually supply 10-20mA for ther control voltage supply.

    I hope this helps,


    Cheers,


    Peter.

    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com


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    Thanks much...



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G-Rex & Spindle Control???

G-Rex & Spindle Control???