Improving Accuracy Of Long Travel Linear Positioning Stages With Error Mapping

A linear encoder can be used to significantly improve the accuracy and repeatability of stepper or servo-motor positioning stages, but even the high-end linear encoders have linearity errors. To reduce these errors, a laser interferometer measures them and uses a motion controller with the capability to store a dynamic error map. Download PI’s blog article for more information on how to improve linear accuracy of long travel linear positioning stages with error mapping.