I have my Velleman K8200 sinds 4 years.
Since this week when I press the home button, it no longer returns to its starting position on the y-axis. He centers it and if I press the home button every time, as a test, the x-axis goes nicely to its home, but the y-axis moves up a bit until I finally reach the other side.
Looks like he keeps forgetting the home position.
Never had it before.