Methods and apparatus for distance sensing used in combination with a linear actuator

摘要

A system and method for measuring a distance to a target work surface to precisely position a tool assembly coupled to an actuator. The method includes measuring a distance to a work surface using a distance sensor, moving the tool assembly into an approach position, the approach position being adjacent to a location on the work surface. The tool assembly is then moved from the approach position to the location on the work surface pursuant to a soft landing procedure. The soft landing procedure may include determining that the tool assembly has moved into soft contact with the target work surface. Methods also include topologically mapping a work surface, comparing map data to predefined data, and adjusting a positioning routine. Additionally, methods include optimizing actuator movements to timely measure distances from a distance sensor to a location on a work surface with minimal actuator movement.

主权项

1. A method for positioning a tool assembly in relation to a location on a work surface, the tool assembly being mechanically coupled to an actuator, the method comprising:
generating, by a distance sensor, an output signal representative of a distance between the distance sensor and the location on the work surface; generating a control signal based upon the output signal; and moving, using the actuator and in response to the control signal, the tool assembly to a desired position relative to the location on the work surface.