For the problem of 168 inline machine running, you can try the following methods:

　　First, check and adjust the fixing method

　　Check the fixing screws: first check whether the fixing screws of the internal machine are loose. If it is screw-fixed, you can try to tighten the screws to see if the running problem can be solved. Adjust the base of the machine: make sure the base of the inline machine is smooth and not wobbly or uneven. If necessary, adjust the support feet of the base or add shims to enhance stability.

　　II. Replace worn or damaged parts

　　Replace bearings and bushings: If the running problem of the inline machine is caused by worn bearings or bushings, consider replacing these parts. New bearings and bushings can provide better support and stability, reducing runout. Check and replace other critical parts: In addition to bearings and bushings, other parts that may affect runout, such as drive belts and gears, should be checked and replaced as needed.

　　Third, adjust the machine parameters

　　Adjust the tension: Improper tension setting of the inner thread machine may also lead to runout. According to the specific machine model and sewing material, adjust the appropriate tension setting to ensure the stability of the thread during the sewing process. Adjusting the stitch length and the stitch pattern: Adjust the density and uniformity of the stitch length and the stitch pattern according to the sewing requirements. Proper stitch length and stitching can reduce running phenomenon and improve sewing quality.

　　Precautions

　　Ensure the material is flat: During the sewing process, ensure that the material to be sewn is flat and wrinkle-free. Wrinkled material will easily lead to running and uneven sewing. Follow the protocol: Strictly follow the protocol of the inner thread machine to avoid improperly causing the machine to malfunction or damage.