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Draw control between paper machine sections regulates

  • A.the small speed difference that sets the web tension
  • B.the absolute speed of the fastest section only
  • C.the torque of the slowest section independently
  • D.the temperature of the drying cylinders

Answer: A

A fraction of a per cent of speed difference stretches the sheet and sets the tension, so the adjustment is fine and the measurement must be finer still. Load cells or dancer rolls close the loop in the more demanding positions.

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