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Table of contents
Safety rules for machine ...................................................................................................... 4
1. Specification..................................................................................................................... 8
1) Sewing machine .......................................................................................................................................................... 8
2) Clutch motor................................................................................................................................................................ 8
2. Installation ........................................................................................................................ 9
1) Installation of oil pan .................................................................................................................................................. 9
2) Installation of machine head..................................................................................................................................... 10
3) Lubrication ................................................................................................................................................................ 11
4) Adjustment of belt tension........................................................................................................................................ 12
5) Installation of belt cover ........................................................................................................................................... 12
3. Adjusting the machine ................................................................................................... 13
1) Inserting needle ......................................................................................................................................................... 13
2) Removing bobbin...................................................................................................................................................... 13
3) Inserting bobbin ........................................................................................................................................................ 14
4) Routing upper thread................................................................................................................................................. 14
5) Adjusting thread tension ........................................................................................................................................... 15
A. Adjusting the upper thread tension
B. Adjusting the lower thread tension
C. Adjusting the thread take up spring tension
6) Adjusting roller presser foot height and pressure .................................................................................................... 16
A. Adjusting the height of the presser foot
B. Adjusting the pressure of the presser foot
7) Rotating roller shaft .................................................................................................................................................. 17
8) Adjusting stitch length .............................................................................................................................................. 17
9) Adjusting timing of needle and feed dog ................................................................................................................. 18
10) Adjusting height of feed dog .................................................................................................................................. 18
11) Adjusting timing of needle and hook ..................................................................................................................... 19
A. Adjusting clearance between needle and edge of hook
B. Adjusting ascending level of needle bar
C. Adjusting height of needle bar
12) Adjusting clearance between hook and opener ..................................................................................................... 20
13) Exchanging needle width gauge set ....................................................................................................................... 20
4. Causes of Trouble and Troubleshooting....................................................................... 21
1) Sewing machine troubleshooting ............................................................................................................................. 21