DA-927A, DA-928A
CONTENTS
1. NAMES OF MAJOR PARTS ...... 1
2. MACHINE SPECIFICATIONS .....
2
3. TABLE AND MOTOR .................
3
3-1. Table processing diagram ............................... 3
3-2. Motor ............................................................... 4
4. INSTALLATION .......................... 5
4-1. Installing the machine head ............................ 5
4-2. Ground wire connections ................................ 7
4-3. Installing the pulley cover ................................ 7
4-4. BeIt tension adjustment .................................. 8
4-5. Assembling the cotton stand ........................... 8
4-6. Lubrication....................................................... 9
4-7. Checking the machine pulley
rotating direction ........................................... 10
5. PREPARATION BEFORE
SEWING ...................................
11
5-1. Needles and threads ..................................... 11
5-2. Installing the needles .................................... 11
5-3. Threading the lower threads ......................... 12
5-4. Threading the upper threads ......................... 12
6. SEWING ................................... 13
6-1. Sewing .......................................................... 13
7. THREAD TENSION .................... 14
7-1. Adjusting the thread tension ......................... 14
7-2. Presser foot pressure adjustment ................. 14
7-3. Adjusting the stitch length ............................. 15
8. CLEANING ................................. 16
8-1. Daily cleaning ................................................ 16
8-2. Changing the lubricating oil
(every three months) ..................................... 16
9. STANDARD ADJUSTMENTS .... 17
9-1. Needle bar height adjustment ....................... 17
9-2. Adjusting the looper rocking movement and
forward-back movement ................................ 18
9-3. Needle and looper timing adjustment ............ 19
9-4. The clearance between the needles and
loopers ........................................................... 20
9-5. Needle guard adjustment .............................. 21
9-6. Feed dog height adjustment .......................... 22
9-7. Upper thread take-up guide adjustment ........ 22
9-8. Adjusting the upper thread guide .................. 23
9-9. Tension release shaft adjustment ................. 23
9-10. Lower thread take-up timing adjustment ..... 23
9-11. Installing the lapper ..................................... 24
10. TROUBLESHOOTING .............. 25
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