Six-Axis Precision Positioning System
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
The basic principle of this device is to provide all six degrees of freedom (X, Y, Z, pitch, roll, and yaw) by placing six 1-axis positioners in parallel (although mutually independent) with respect to base, rather than in series. Six precision linear actuators A, B, C, D, E, and F are fastened to base G as shown. Platform H is located relative to the linear actuators by balls J and preload springs K. The balls (or sphere-ended spacer rods) allow relative motion between platform H and the respective linear actuators, without requiring sliding motion, in all degrees of freedom except one per actuator.