| 摘要 |
A method of controlling the conveyance of a web comprises a web measuring step of measuring the conveyance speed (V) and the tension force (T) of the web (2) during its conveyance, a slip amount calculation step of calculating the slip amount (W) of the web (2) relative to a guide roll (14) from the values of the conveying speed (V) and the tension force (T) of the web (2) measured in the web measuring step, and a web control step of controlling the tension force of the web (2) during its conveyance so that the slip amount (W) of the web (2) relative to the guide roll (14) calculated in the slip amount calculation step is equal to a preset target slip amount (W1). Consequently, the slip of the web is accurately controlled, whereby the lateral displacement of the web can be reduced.
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