DA-9270
iv
CONTENTS
1. NAMES OF MAJOR PARTS...................... 01
2. MACHINE SPECIFICATIONS..................... 01
3. WORK TABLE AND MOTOR .................... 02
4. INSTALLATION............................................. 03
4-1. Installing the machine head ............... 03
4-2. Ground wire connections ................... 04
4-3. Installing the pulley cover .................. 05
4-4. Belt tension adjustment...................... 06
4-5. Cotton stand......................................... 06
4-6. Lubrication............................................ 07
4-7. Checking the machine pulley
rotating direction ................................. 08
5. PREPARATION BEFORE SEWING ........... 08
5-1. Needles and threads............................ 08
5-2. Installing the needles .......................... 08
5-3. Threading the lower threads.............. 09
5-4. Threading the upper threads ............. 09
6. SEWING ......................................................... 10
6-1. Sewing .................................................. 10
7. THREAD TENSION...................................... 11
7-1. Adjusting the thread tension ............. 11
7-2. Presser foot pressure adjustment ..... 11
7-3. Adjusting the stitch length................. 12
7-4. Puller feed adjustment (Machines
with puller) ........................................... 12
8. CLEANING..................................................... 14
8-1. Daily cleaning ....................................... 14
8-2. Changing the lubricating oil
(every three months)........................... 14
9. STANDARD ADJUSTMENTS ................... 15
9-1. Needle bar height adjustment ........... 15
9-2. Needle and looper timing
adjustment............................................ 16
9-3. Timing of loopers running clear of
needles .................................................. 17
9-4. Needle guard adjustment ................... 17
9-5. Feed dog height adjustment .............. 18
9-6. Upper thread take-up thread
guide adjustment................................. 19
9-7. Upper thread arm thread guide
adjustment............................................ 19
9-8. Thread release shaft adjustment ....... 19
9-9. Lower thread take-up timing
adjustment............................................ 19
9-10. Installing the lapper............................. 20
9-11. Puller height adjustment
(Machines with puller) ........................ 20
9-12. Puller device timing adjustment
(Machines with puller) ........................ 20
10.TROUBLESHOOTING ................................. 21
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