275C Restore factory settings
275C Zero point calibration of spindle motor
275C Switching between Chinese and English
275C Pressure foot height adjustment
275C Quick adjustment of needle stop position
275C Lift the presser foot to loosen the wire
275C Speed lock
275C Quick adjustment of upper stop needle po
275C Adjustment of forward needle pitch a
275C Front and rear seam setting
275C Positioning of the wire cutting and pre
275C Piece count adjustment
275C Pattern sewing settings and usage
275C Rear step lift presser foot switch
275C Analysis of the quality of electronic kn
275C Bottom line clamp adjustment
275C Zero point correction of reverse sewing
275C Analysis of the quality of the reverse s
275C Knife pressure adjustment
275C Test the thread cutting tool stroke
275C Dialer switch