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Precise transport positioning apparatus using a closed loop controlled, non-direct drive or friction drive system with absolute positioning encoder
Precise transport positioning apparatus using a closed loop controlled, non-direct drive or friction drive system with absolute positioning encoder
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机译:使用带有绝对定位编码器的闭环控制,非直接驱动或摩擦驱动系统的精确运输定位设备
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摘要
An apparatus for positioning a workpiece carrier with respect to a workstation can include a workpiece carrier movable relative to the workstation and having an encoder strip, at least one encoder reader located at the workstation for generating a signal in response to interaction with at least one encoder strip, and a drive engaging the workpiece carrier for moving the carrier relative to the workstation, the drive responsive to the signal from the encoder reader. The encoder reader can be selected from a group consisting of an optical encoder reader, a magnetic encoder reader, and any other absolute positioning encoder reader. A closed loop feedback control system can be provided for receiving the signal from the encoder reader, and for generating an output signal in response to the signal from the encoder reader in accordance with a program stored in memory. The encoder reader can be used for generating a signal corresponding to at least one of a position identification signal, a workpiece carrier identification signal, and a workpiece configuration identification signal.
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