First check whether the paper is in the middle of the label from the sensor, as shown in the figure

This blue sensor can be moved left and right to the middle of the label.

2: Check whether the print head is pressed tightly, as shown in the figure

As shown in the picture, if the print head is pressed tightly, the machine indicator light will show solid blue!

Three: no compression phenomenon

the buckle on the right side is not stuck in

or the nail hook on the left side is not stuck in