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US 5,942,870 AGranted
Process and apparatus for positioning an object
AssigneeMannesmann Aktiengesellschaft
InventorsRolf Koschorrek, Stefan Elspass, Michael Hulsmann
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AssigneeMannesmann Aktiengesellschaft
InventorsRolf Koschorrek, Stefan Elspass, Michael Hulsmann
Estimating the term…
A process and apparatus for positioning an object being moved along a path to a destination using a pole changing three-phase induction motor having at least two fixed driving speeds. The object is initially accelerated along the path of movement to the highest driving speed of the motor, during which the acceleration curve is determined and stored. The acceleration data is then used to calculate the location along the path in advance of the destination at which the motor is switched off and braked until reaching the next lower driving speed, whereupon the motor is operated at the next lower driving speed for a predetermined path length. The motor is then again switched off and braked until its driving speed reaches zero closely proximate the destination, at which point a motor in a gear assembly attached to the motor is operated for final low speed positioning of the object at the destination with a high degree of accuracy. The calculation of the initial switch-off location using, in the preferred embodiment, the dynamically-determined acceleration curve results in rapid and highly accurate object positioning without the need for undesirable buffer paths.
A process for positioning an object at a preset destination by moving the object along a path to the destination through controlled operation of an electric motor and which is switchable between at least a highest driving speed and a next lower driving speed, comprising the steps of:
An apparatus for positioning an object at a preset destination by moving the object along a path to the destination through controlled operation of a pole changing three-phase induction motor having at least two fixed driving speeds comprising a highest driving speed and a next lower driving speed by advancing the object along the path toward the destination at the highest driving speed and, at a predetermined switch-off location in advance of the preset destination, switching off the motor and braking the movement of the object until the object is moving at the next lower driving speed, said apparatus comprising:
Dependencies are inferred from the claim text.