Before replacing the stitch length adjustment knob, please note the following:
1. Do not replace parts while the sewing machine is powered on. Always turn off the power before operation.
2. Before replacing parts, it is best to consult the sewing machine's instruction manual or a professional technician to ensure your operating method is correct.
3. When replacing the stitch length adjustment knob, ensure the safety of your tools to avoid accidental injury or damage to sewing machine parts.
4. After replacing the parts, turn on the sewing machine to check its performance. Address any abnormalities promptly.
