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A printing press drive train requires

  • A.the highest possible speed with no coordination
  • B.one-quadrant operation without any speed control
  • C.torque proportional to the square of the web speed
  • D.exact register between successive printing units

Answer: D

Each colour must be laid within a fraction of a millimetre of the last, so the units run in exact and trimmable angular relationship. Electronic line shaft control has replaced the mechanical shaft and its gearing entirely.

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