Embroidery machines are always misplaced! Help urgently!

Checked, does not mean there is no problem, because the mechanic's level problem will lead to this situation not being checked out. Don't blindly believe unless you know about machine maintenance and electrical appliances yourself.

Left and right dislocations, right posterior dislocations?

If the front and rear positions are good, then you should try to switch the left and right of the drive and the front and rear (XY direction). If the problem continues to appear after switching and the direction changes from left to right to front and back, then the drive is broken. If the direction does not change, the machine is damaged, or the left and right stepping motors are broken.

I once met one that the stepping motor in the X direction was broken, and the other that the stepping motor was not broken and the joint was well fastened from the outside. However, when the bedplate is opened, the connection part between the motor and the X transmission shaft is loose. Even once, the shaft of the motor was broken. ...

Give you a direction, as you see fit.

Embroidery machine is easy to repair but difficult to repair. Careful care will help you solve many seemingly difficult but simple faults.