| 摘要 |
Apparatus for positioning and holding a tool ( 3 ) relative to a workpiece ( 35 ) comprising a carriage ( 1 ) for conveying the tool over the surface of the workpiece ( 35 ) and means ( 7, 9, 11, 13 ) for holding the carriage ( 1 ) onto the surface of the workpiece ( 35 ), the holding means being selectively switchable between a low grip state in which the carriage ( 1 ) is held against the workpiece surface whilst remaining capable of movement relative thereto and a high grip state in which the carriage ( 1 ) is held substantially fixedly to the workpiece surface for the tool ( 3 ) in use to operate thereon. Such an arrangement provides a robot capable of "crawling" over a workpiece ( 35 ) and carrying out precise manufacturing operations thereon.
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