X axis studdering / hesitating

Having an issue with my x-axis studdering or hesitating. Check the belt tension and it seems fine and all the bearings look like they are rolling fine. Any ideas on this one to check? Using the LCD controller doesn’t seem to be going smoothly across the axis and back. I rolled it to 320 and it looks like every 20 or 30 mm it hesitates for literally a microsecond and then continues. It seems it is the primary reason the print is off.

Solved. X axis motor pully was slipping. Screws came a little loose