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PCB drilling question

Discussion in 'Electronic Basics' started by [email protected], Jun 1, 2005.

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  1. Guest

    In commercial CNC setups, is the drill motor powered during the entire
    drilling operation (except tool changes) or is it cycled on/off at each
    hole location?
     

  2. When I saw that operation at a local board house, the
    drill spent as about much time in the stack as out. There
    was no pause to let the motor spin down and back up,
    and I doubt any shop would do it that way.
     
  3. Guest

    I doubt any shop would do it that way

    Me too. I foolishly went and bought a SSR with zero-crossing and
    snubber circuitry for motor control in my CNC setup then realized that
    even though X and Y speeds are slow at 20 IPM, it still probably didn't
    justify cycling the power on/off at hole locations.
     
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