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.
This manual provides step‑by‑step instructions for installing the DDL‑9000B sewing machine, adjusting needle height, presser foot pressure, feed mechanism and other critical settings. Safety warnings and oil‑filling procedures are included to ensure reliable operation.
Detailed sections cover needle and presser foot installation, oil level checks, thread tension adjustment, feed‑dog height, and troubleshooting tips for common issues during use and maintenance. This manual is written in Chinese.
| Maximum stitching speed | 5,000 st/min |
|---|---|
| Feed speed | 300 st/min |
| Maximum needle size | 14 mm |
Set the feed speed to 300 stitches per minute as specified for the machine.