HEIDENHAIN

 3 / 3 
Definition of error types

Position error within one signal period

The position error within one signal period is determined by the signal period of the encoder, as well as the quality of the graduation and its scanning. At any measuring position, it does not exceed ± 2 % of the signal period, and for the LC absolute linear encoders it is typically ± 1 %. The smaller the signal period, the smaller the position error within one signal period.

 Signal period of the scanning signals
Max. position error u within one signal period
LF4 µmApprox. ± 0.08 µm
LC20 µmApprox. ± 0.2 µm
LS20 µmApprox. ± 0.2 µm
LB40 µmApprox. ± 0.8 µm