| 摘要 |
This invention concerns a control system and a method for a back-and-forth cable system. The cable system includes a running cable, a first pulley and a second pulley, the pulleys being located at both ends of a course for guiding the running cable. A controllable motor assembly drives of the pulleys and a carrier is connected to the running cable, for pulling or towing a boarder. The control system includes first and second tracking devices to generate first and second tracking signal indicative of the rotation of the pulleys. Two limit positions along the course are stored in storing means and a controller has inputs to receive the first and the second tracking signals and inverts rotation of the controllable motor assembly when the two positions of the carrier detected go beyond either one of the two limit positions.
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