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42690Re: Parker Hannifin CD20 drives with Mach3

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  • corey94945
    Nov 1 1:48 AM
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      The drives are connected to a backplane, but the data lines are just a
      straight passthru, there is no logic on the backplane just a couple of
      fuses and connectors to attach to power.


      --- In mach1mach2cnc@yahoogroups.com, Les Newell <lesnewell@h...> wrote:
      > Hi Corey,
      > Are you using a Parker drive rack or are you directly connecting to the
      > drives? The drives use 12V logic, not 5V. The Campbell board uses 5V.
      > You need to use an open collector buffer chip, something like a ULN2003
      > darlington driver should work.
      > Les
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