Deviation of the x-axis when engraving

Hi I have a problem, when engraving sometimes and not always suddenly the x-axis deviates as shown in the picture below, I am completely confused I appreciate anyone who can guide me.

engraving speed : 250 mm/sec
line interval (mm) : 0.150
overscanning: 8mm

Problem solved, x-axis motor stepper had a problem :neutral_face: