S9 axis issue and blur

Could be any or all:

1. Loose laser mouting.
2. Xaxis trolley rollers no snug on the track.
3. One or both gantry trolleys loose in the rails.
4. One or both gantry belts not snug.
5. Frame not square.
6. Overshoot during acceleration and or deceleration.

If you find one item in this list needed fixing, don’t stop. There is a fair chance there is more. These are precision positioning machines. “Good enough” is not good enough here.