A: Observe whether the paper core has obvious deformation, whether it has become an obvious ellipse, if so, it can be replaced;

Observe whether the paper core has scrap burrs, clean it up and then try whether it is OK, if it still does not work, it may be deformed, and it can be returned;

Check whether the printer's unwinding reel is deformed or whether there is debris adhering to the shaft, if you can replace or clean the reel;

If so, replace the shrapnel, if not, the inner diameter of the paper core may be too large, and one or two labels can be affixed to the inner wall.

6.Q: Why is there a crackling electric spark when printing?

A: When printing, place the machine on a conductive platform as much as possible, and if there is no condition, you can install an electrostatic elimination device on the printer;

Ground the printer.