| 摘要 |
A method of controlling the speed of the output of a V-belt drive having an output driven pulley driven by a V-belt from an input driver pulley wherein the rotational speed of the driver pulley is determined, the ratio of the effective belt drive diameters of the driver and driven pulleys are determined and the effective belt to drive diameter of at least one of the pulleys is adjusted to provide a preselected speed of the drive output.
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