| 摘要 |
A roll storage module comprises a storage roll (4) and a band roll (1). A band (3) extends between the storage and band rolls, the rolls being rotatable so that the band can be rolled around and unrolled from each roll. A storage roll motor (5) applies a rotational torque directly to the storage roll (4), a band roll motor (2) applies a rotational torque directly to the band roll (1). A control system (6) controls the motors (2,5) so as to cause the band (3) to roll on and unroll from the storage and band rolls (1,4) respectively in a determined manner. The control system includes a processor (6) for monitoring rotation of the band roll (1), and for calculating one or more parameters relating to the band (3) based on the monitored band roll rotation thereby to control the band and storage roll motors to rotate their respective rolls in the determined manner.
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