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Re: Parker Hannifin CD20 drives with Mach3

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  • corey94945
    Les, thank you very much for your help. I m heading to Radio Shack over lunch, if they don t have it I ll get it from one of the mail-order places. I can t
    Message 1 of 6 , Nov 1, 2005
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      Les,
      thank you very much for your help. I'm heading to Radio Shack over
      lunch, if they don't have it I'll get it from one of the mail-order
      places. I can't wait to have this mill perform its first wiggle.

      cheers,
      c

      --- In mach1mach2cnc@yahoogroups.com, Les Newell <lesnewell@h...> wrote:
      >
      > In that case you need to find some way of buffering the signals. A
      > ULN2003 is easy to use. Get the data sheet from here
      > <http://www.jaycar.com.au/images_uploaded/ULN2003.PDF> to see what I am
      > talking about (usual warning - you may have to cut and paste the link).
    • art
      ... If the motors chatter when the step/dir lines are disconnected, the I suspect one thing, either they are 12 volt (or 24Volt) inputs (many parker s are).
      Message 2 of 6 , Nov 1, 2005
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        Hi c:

        > move. I know they are live because if I disconnect the step and
        > direction wires to the controller with everything powered up, the
        > motors chatter. But, Mach cannot make the motors move. The manual
        > for the controllers says that they expect a "low-going transition" for
        > step and direction signals. It also says that "the input should
        > remain low for not less than 5us and not more than 30us" Max step
        > rate is 50kHz in half-step mode which is how they are jumpered.

        If the motors chatter when the step/dir lines are disconnected, the I
        suspect one thing,
        either they are 12 volt (or 24Volt) inputs (many parker's are). Youd need to
        make a 24 volt level shifter to run them. (I dumped a few parkers years ago
        due to poor performance due to this issue..)

        Regards,
        Art
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