My Kity 613 has terrible blade drift. So bad it renders the machine utterly useless for some of the primary things I got it for: in particular re-sawing, and cutting accurate thin veneers.
After masses of fiddling and finagling with the set-up, I temporarily achieved a very minor improvement. Maybe I just need (another!) new blade?
I had to adjust a screw to get the bed of the table flat. Initially I shimmed it with a thin slice of wood. Then I managed to adjust the nuts/bolt, to get the correct level without the shim.
The fence also needed a slight adjustment. It was out a whisker. Maybe a millimetre, at the far end? I adjusted and corrected that.
But, despite all these things, and setting up the top wheel tilt and tension, to get the blade running in the correct position; and adjusting all the guide bearings, etc, it still drifts like hell, and – when working at its best – results in a concave bowed cut.
Exasperating!