y axis Inconsistency

  • I have a problem with my Cr 6 SE printer. I have this printer for about 4 months. The first prints were surprisingly good. For about a month now, the consistency of the y axis has decreased rapidly. I have not changed anything, hardware or software. At first the printouts may have been fine, but now the problem occurs on maybe 3 out of 4 attempts. What confuses me is that the shift is different each time. I have tried to print an object several times in a row, and the result (strange y-shift) was different each time. Do you have any suggestions on how I can fix the problem?
    Thank you