Rotary Encoder Calibration

Abstract

Manufacturer of an encoder gives an information about maximum error level of the measured position and the magnitude of the angle deviation for each single position is unknown. The calibration provides an error map which can be used for correction of actual measured angle value. Hence, the measurement accuracy for each position is significantly increased. Presented method provides on-axis self-calibration and does not require any external angle standard. It is based on the interpolation of correct angle position for each count of the encoder.