Abstract
The structure of a flexible microprocessor-based controller for a low-cost robot for component handling is described. The robot demonstrates three degrees of freedom within cylindrical coordinate motion. One axis uses end-stop pneumatic actuation with the remaining two axes being actuated by specially designed hydropneumatic drives. By using hydropneumatic actuation and incremental encoder feedback, point-to-point positioning is provided through a real-time closed-loop control algorithm designed and implemented within the controller structure. Interactive programming aids have also been implemented within the control structure to allow operatives to describe robot handling tasks by using a shop floor oriented language. Both hardware and software for the controller have been developed in a modular form to increase its flexibility allowing the modules produced to be used for the control of other work-handling systems.
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