This manual introduces the operation methods of DDL-9000B sewing machine, including installation, oiling, needle installation, shuttle insertion, shuttle oil amount adjustment, threading, thread tension, bobbin winding, pressure foot pressure, stitch length, pick-up spring and pick-up amount adjustment, needle stop position adjustment, pedal pressure and stroke, pedal adjustment, pedal operation, needle and shuttle relationship, single-touch manual reverse sewing, pick-up rod position adjustment, fixed knife, feed dog height and inclination adjustment, feed motion, thread release mechanism, micro-lift foot, shrinking method, transmission conversion spring mechanism (DDL-9000B-S, -M) and other contents.
