1. Skipped Stitches:

– Check the needle condition and replace it if it is dull or bent. Ensure the needle is properly installed and the thread is correctly threaded.

2. Uneven Tension:

– Adjust the thread tension dial to find the correct balance. If the stitches are too tight or loose, re-thread the machine and adjust the tension settings.

3. Fabric Puckering:

– Check the tension and stitch length. For lightweight fabrics, reduce the tension and lengthen the stitch slightly.

4. Machine Jamming:

– Ensure the bobbin is correctly inserted and the machine is properly threaded. Clean out any lint or debris from the bobbin area and throat plate.