Patent ID: 6205881
Filing Date: 2001-03-27
Classification: B23Q,H01L,Y10S,Y10T

Abstract:
A control device for controlling a drive of a substrate container transfer device including at least two substrate container transfer mechanisms operating separately from one another, the control device being adapted to respond to at least one state of the mechanisms, the mechanisms being adapted to he positioned in different states, comprising:means for receiving a drive force, said means for receiving a drive force being fixedly connected to a hollow drive shaft, wherein a force exerted on said means for receiving a drive force is passed onto said drive shaft;first and second means for power delivery displaceable an said drive shaft, which operate separately from one another and each of which being assigned to one of the mechanisms, said first and second means for power delivery being adapted to selectively receive said force passed onto said drive shaft;means for power transmission, which operate in settings different from one another, a first setting preventing power transmission from said means for receiving the drive force to said means for power delivery, a second setting transmitting the drive force to said first means for power delivery and a third setting transmitting the drive force to said second means for power delivery, said drive shaft being in selective communication with said means for power transmission in each of said first, second and third settings; andsignal-receiving means at said means for power transmission for receiving a control signal dependent on the state of the mechanisms for producing the various settings of said means for power transmission, the signal receiving means being connected to a signal generator to generate control signals for the power transmission,a device for signal transmission, of which a first signal represents a power transmission from said means for receiving the drive force to said means for power delivery and a second signal represents an interruption in the power transmission, said first signal preventing a change in a state of a mechanism which has been put into operation, operation, and said second signal allowing a change in the the device for signal transmission being coupled to a blocking device to prevent or allow a change in state of the mechanism, wherein at least one mechanism state comprises an aligned and coupled state with respect to a reference location, the aligned and coupled state being determined for an aligned mechanism for the transfer of items by the aligned mechanismwherein at least one alignment and coupling means for assuming the aligned and coupled states is fastened on a mobile base, on which said blocking device prevents or allows a movement away from said reference location on the basis of said first and second signals,and wherein the means for power transmission comprises a control shaft which is mounted axially displaceably in the interior of a hollow shaft and, depending on the displacement of the control shaft, engages drivers into said first and second means for power delivery for the purposes of power transmission, and drivers which are locked by a fixed part of the control device for the purpose of preventing power transmission.