The best check for the machine is to power up, install a probing pin, jog to the center of motion for all axes, then grab the tip of the probing pin and try to shift it in all possible directions — it should be steady, any aspect of movement should be investigated.
https://carbide3d.com/hub/docs/maintenance/
If the machine checks out mechanically, then the question is if the geometry is drawn accurately — if it is, then the toolpaths may be looked into
and feeds and speeds checked out: