Hello Gianluca,

> Each time a "learning" is finished and the PEC is
> on, the corrections performed by the PEC are bigger then the ones I
> performed during the learning procedure, and the referencing star
> moves a lot in the field of view following the wrong inputs of the
> PEC.

It helps if you make the "rate 1" parameter as small as possible,
meaning that during the learning period you make longer corrections
with smaller speed.

Michael