Mechatronic sensor system for robots and automated machines

Abstract

Flex-Picker robots, as well as many automated multi-axis machines, operate under overall "open loop" control. The exact position in space of the end effecter or tool head is not sensed directly. The software controlling the robot or automated machine makes a calculated estimate of where the tool-head should be. This is often achieved by monitoring sensors on axes that track linear translation and rotations of shafts or gears. For low precision applications this system is appropriate. However positional errors can occur. This method may not be suitable for high precision robots and automated machine tools. There exists a need for a sensor system that is capable of acquiring the exact spatial coordinates of the tool point or end effectors directly