1. Line fault: When there is a problem with the line of the sewing machine, it usually causes the sewing machine to lose power and thus be unable to feed the fabric forward.
2. Wear of machine gears: The gears inside the sewing machine are responsible for driving the sewing machine to work. When the gears are worn, it will seriously affect the working efficiency of the sewing machine.
3. Wrong adjustment of the presser foot height: The presser foot of the sewing machine is responsible for fixing the fabric. If there is a problem with the height adjustment of the presser foot, the sewing machine will be unable to feed the fabric forward.
