Automatic Fabric Sensor System (Automatic Presser Foot Pressure)
The thickness of the fabric is automatically detected and the presser foot pressure is automatically adjusted with an internal sensor while sewing, to insure that your fabric is fed smoothly. The fabric sensor system works continuously while sewing. This function is useful for sewing heavyweight fabrics, or quilting.
Touch 
, and then set [Automatic Fabric Sensor System] to [ON].
