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